SDI-12-LB -- SDI-12 to LoRaWAN Converter User Manual

The Dragino (% style="color:blue" %)**SDI-12-LB**(%%) is a (% style="color:blue" %)**SDI-12 to LoRaWAN Converter **(%%)designed for Smart Agriculture solution.

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SDI-12 (Serial Digital Interface at 1200 baud) is an asynchronous [[serial communications>>url:https://en.wikipedia.org/wiki/Serial_communication]] protocol for intelligent sensors that monitor environment data. SDI-12 protocol is widely used in Agriculture sensor and Weather Station sensors.

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SDI-12-LB has SDI-12 interface and support 12v output to power external SDI-12 sensor. It can get the environment data from SDI-12 sensor and sends out the data via LoRaWAN wireless protocol.

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The LoRa wireless technology used in SDI-12-LB allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.

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SDI-12-LB is powered by (% style="color:blue" %)**8500mAh Li-SOCI2 battery**(%%), it is designed for long term use up to 5 years.

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Each SDI-12-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.

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[[image:image-20230201084414-1.png||height="464" width="1108"]]

== 1.2 Features ==

* LoRaWAN 1.0.3 Class A

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* Ultra-low power consumption

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* Controllable 3.3v, 5v and 12v output to power external sensor

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* SDI-12 Protocol to connect to SDI-12 Sensor

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* Monitor Battery Level

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* Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865

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* Support Bluetooth v5.1 and LoRaWAN remote configure.

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* Support wireless OTA update firmware

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* Uplink on periodically

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* Downlink to change configure

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* 8500mAh Battery for long term use

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== 1.3 Specification ==

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(% style="color:#037691" %)**Micro Controller:**

* MCU: 48Mhz ARM

* Flash: 256KB

* RAM: 64KB

(% style="color:#037691" %)**Common DC Characteristics:**

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* Supply Voltage: 2.5v ~~ 3.6v

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* Support current: 5V 300mA

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12V 100mA

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* Operating Temperature: -40 ~~ 85°C

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(% style="color:#037691" %)**LoRa Spec:**

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* Frequency Range, Band 1 (HF): 862 ~~ 1020 Mhz

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* Max +22 dBm constant RF output vs.

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* RX sensitivity: down to -139 dBm.

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* Excellent blocking immunity

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(% style="color:#037691" %)**Current Input Measuring :**

* Range: 0 ~~ 20mA

* Accuracy: 0.02mA

* Resolution: 0.001mA

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(% style="color:#037691" %)**Voltage Input Measuring:**

* Range: 0 ~~ 30v

* Accuracy: 0.02v

* Resolution: 0.001v

(% style="color:#037691" %)**Battery:**

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* Li/SOCI2 un-chargeable battery

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* Capacity: 8500mAh

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* Self-Discharge: <1% / Year @ 25°C

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* Max continuously current: 130mA

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* Max boost current: 2A, 1 second

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(% style="color:#037691" %)**Power Consumption**

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* Sleep Mode: 5uA @ 3.3v

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* LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm

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== 1.4 Connect to SDI-12 Sensor ==

[[image:1675212538524-889.png]]

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== 1.5 Sleep mode and working mode ==

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(% style="color:blue" %)**Deep Sleep Mode: **(%%)Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life.

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(% style="color:blue" %)**Working Mode: **(%%)In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode.

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== 1.6 Button & LEDs ==

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[[image:1675212633011-651.png]]

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(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)

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|=(% style="width: 167px;" %)**Behavior on ACT**|=(% style="width: 109px;" %)**Function**|=(% style="width: 231px;" %)**Action**

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|(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:109px" %)Send an uplink|(% style="width:231px" %)(((

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If sensor is already Joined to LoRaWAN network, sensor will send an uplink packet, (% style="color:blue" %)**blue led** (%%)will blink once.

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Meanwhile, BLE module will be active and user can connect via BLE to configure device.

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|(% style="width:167px" %)Pressing ACT for more than 3s|(% style="width:109px" %)Active Device|(% style="width:231px" %)(((

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(% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:#037691" %)**OTA mode**(%%) for 3 seconds. And then start to JOIN LoRaWAN network.

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(% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.

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Once sensor is active, BLE module will be active and user can connect via BLE to configure device, no matter if device join or not join LoRaWAN network.

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|(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:109px" %)Deactivate Device|(% style="width:231px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means SDI-12-LB is in Deep Sleep Mode.

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== 1.7 Pin Mapping ==

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[[image:1675213198663-754.png]]

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== 1.8 BLE connection ==

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SDI-12-LB support BLE remote configure.

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BLE can be used to configure the parameter of sensor or see the console output from sensor. BLE will be only activate on below case:

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* Press button to send an uplink

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* Press button to active device.

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* Device Power on or reset.

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If there is no activity connection on BLE in 60 seconds, sensor will shut down BLE module to enter low power mode.

== 1.9 Mechanical ==

[[image:image-20230201090139-2.png]]

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[[image:image-20230201090139-3.png]]

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[[image:image-20230201090139-4.png]]

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= 2. Configure SDI-12 to connect to LoRaWAN network =

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== 2.1 How it works ==

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The SDI-12-LB is configured as (% style="color:#037691" %)**LoRaWAN OTAA Class A**(%%) mode by default. It has OTAA keys to join LoRaWAN network. To connect a local LoRaWAN network, you need to input the OTAA keys in the LoRaWAN IoT server and activate the SDI-12-LB. It will automatically join the network via OTAA and start to send the sensor value. The default uplink interval is 20 minutes.

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== 2.2 Quick guide to connect to LoRaWAN server (OTAA) ==

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Following is an example for how to join the [[TTN v3 LoRaWAN Network>>url:https://console.cloud.thethings.network/]]. Below is the network structure; we use the [[LPS8v2>>url:https://www.dragino.com/products/lora-lorawan-gateway/item/228-lps8v2.html]] as a LoRaWAN gateway in this example.

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[[image:image-20230201090528-5.png||height="465" width="1111"]]

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The LPS8V2 is already set to connected to [[TTN network >>url:https://console.cloud.thethings.network/]], so what we need to now is configure the TTN server.

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(% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from SDI-12-LB.

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Each SDI-12-LB is shipped with a sticker with the default device EUI as below:

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[[image:image-20230201152430-20.jpeg]]

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You can enter this key in the LoRaWAN Server portal. Below is TTN screen shot:

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(% style="color:blue" %)**Register the device**

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[[image:1675213652444-622.png]]

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(% style="color:blue" %)**Add APP EUI and DEV EUI**

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[[image:1675213661769-223.png]]

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(% style="color:blue" %)**Add APP EUI in the application**

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[[image:1675213675852-577.png]]

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(% style="color:blue" %)**Add APP KEY**

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[[image:1675213686734-883.png]]

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(% style="color:blue" %)**Step 2**(%%): Activate on SDI-12-LB

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Press the button for 5 seconds to activate the SDI-12-LB.

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(% style="color:green" %)**Green led**(%%) will fast blink 5 times, device will enter (% style="color:blue" %)**OTA mode** (%%)for 3 seconds. And then start to JOIN LoRaWAN network. (% style="color:green" %)**Green led**(%%) will solidly turn on for 5 seconds after joined in network.

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[[image:1675213704414-644.png]]

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== 2.3 SDI-12 Related Commands ==

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User need to configure SDI-12-LB to communicate with SDI-12 sensors otherwise the uplink payload will only include a few bytes.

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=== 2.3.1 Basic SDI-12 debug command ===

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User can run some basic SDI-12 command to debug the connection to the SDI-12 sensor. These commands can be sent via AT Command or LoRaWAN downlink command.

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If SDI-12 sensor return value after get these commands, //SDI-12-LB// will uplink the return on FPORT=100, otherwise, if there is no response from SDI-12 sensor. //SDI-12-LB// will uplink NULL (0x 4E 55 4C 4C) to server.

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The following is the display information on the serial port and the server.

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[[image:image-20230201091027-6.png]]

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[[image:image-20230201091027-7.png||height="261" width="1179"]]

==== (% style="color:blue" %)**al! ~-~- Get SDI-12 sensor Identification**(%%) ====

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* AT Command: AT+ADDRI=aa

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* LoRaWAN Downlink(prefix 0xAA00): AA 00 aa

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(% style="color:#037691" %)**Parameter: **(%%)aa: ASCII value of SDI-12 sensor address in downlink or HEX value in AT Command)

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(% style="color:blue" %)**Example : **(%%)AT+ADDRI=0 ( Equal to downlink: 0x AA 00 30)

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The following is the display information on the serial port and the server.

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[[image:image-20230201091257-8.png]]

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[[image:image-20230201091257-9.png||height="225" width="1242"]]

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==== (% style="color:blue" %)**aM!,aMC!, aM1!- aM9!, aMC1!- aMC9!**(%%) ====

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(% style="color:red" %)**aM! **(%%): Start Non-Concurrent Measurement

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(% style="color:red" %)**aMC! **(%%): Start Non-Concurrent Measurement – Request CRC

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(% style="color:red" %)**aM1!- aM9! **(%%): Additional Measurements

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(% style="color:red" %)**aMC1!- aMC9!**(%%) : Additional Measurements – Request CRC

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* AT Command : AT+ADDRM=0,1,0,1

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* LoRaWAN Downlink(prefix 0xAA01): 0xAA 01 30 01 00 01

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Downlink：AA 01 aa bb cc dd

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(% style="color:#037691" %)**aa**(%%): SDI-12 sensor address.

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(% style="color:#037691" %)**bb**(%%): 0: no CRC, 1: request CRC

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(% style="color:#037691" %)**cc**(%%): 1-9: Additional Measurement, 0: no additional measurement

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(% style="color:#037691" %)**dd**(%%): delay (in second) to send (% style="color:#037691" %)__**aD0!**__(%%) to get return.

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The following is the display information on the serial port and the server.

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[[image:image-20230201091630-10.png]]

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[[image:image-20230201091630-11.png||height="247" width="1165"]]

==== (% style="color:blue" %)**aC!, aCC!, aC1!- aC9!, aCC1!- aCC9! **(%%) ====

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(% style="color:red" %)**aC!**(%%) : Start Concurrent Measurement

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(% style="color:red" %)**aCC!** (%%): Start Concurrent Measurement – Request CRC

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(% style="color:red" %)**aC1!- aC9!**(%%) : Start Additional Concurrent Measurements

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(% style="color:red" %)**aCC1!- aCC9!**(%%) : Start Additional Concurrent Measurements – Request CRC

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* AT Command : AT+ADDRC=0,1,0,1

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* LoRaWAN Downlink(0xAA02): 0xAA 02 30 01 00 01

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Downlink: AA 02 aa bb cc dd

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(% style="color:#037691" %)**aa**(%%): SDI-12 sensor address.

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(% style="color:#037691" %)**bb**(%%): 0: no CRC, 1: request CRC

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(% style="color:#037691" %)**cc**(%%): 1-9: Additional Measurement, 0: no additional measurement

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(% style="color:#037691" %)**dd**(%%): delay (in second) to send (% style="color:#037691" %)__**aD0!**__(%%)__ __to get return.

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The following is the display information on the serial port and the server.

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[[image:image-20230201091954-12.png]]

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[[image:image-20230201091954-13.png||height="203" width="1117"]]

==== (% style="color:blue" %)**aR0!- aR9!, aRC0!- aRC9!**(%%) ====

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Start Continuous Measurement

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Start Continuous Measurement – Request CRC

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* AT Command : AT+ADDRR=0,1,0,1

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* LoRaWAN Downlink (0xAA 03): 0xAA 03 30 01 00 01

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Downlink: AA 03 aa bb cc dd

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(% style="color:#037691" %)**aa**(%%): SDI-12 sensor address.

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(% style="color:#037691" %)**bb**(%%): 0: no CRC, 1: request CRC

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(% style="color:#037691" %)**cc**(%%): 1-9: Additional Measurement, 0: no additional measurement

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(% style="color:#037691" %)**dd**(%%): delay (in second) to send (% style="color:#037691" %)__**aD0!**__(%%) to get return.

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The following is the display information on the serial port and the server.

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[[image:image-20230201092208-14.png]]

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[[image:image-20230201092208-15.png||height="214" width="1140"]]

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=== 2.3.2 Advance SDI-12 Debug command ===

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This command can be used to debug all SDI-12 command.

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LoRaWAN Downlink: A8 aa xx xx xx xx bb cc

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(% style="color:#037691" %)**aa **(%%): total SDI-12 command length

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(% style="color:#037691" %)**xx **(%%): SDI-12 command

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(% style="color:#037691" %)**bb **(%%): Delay to wait for return

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(% style="color:#037691" %)**cc **(%%): 0: don't uplink return to LoRaWAN, 1: Uplink return to LoRaWAN on FPORT=100

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(% style="color:blue" %)**Example: **(%%) AT+CFGDEV =0RC0!,1

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(% style="color:#037691" %)**0RC0! **(%%): SDI-12 Command,

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(% style="color:#037691" %)**1 **(%%): Delay 1 second. ( 0: 810 mini-second)

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Equal Downlink: 0xA8 05 30 52 43 30 21 01 01

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The following is the display information on the serial port and the server.

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[[image:image-20230201092355-16.png]]

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[[image:image-20230201092355-17.png||height="426" width="1135"]]

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=== 2.3.3 Convert ASCII to String ===

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This command is used to convert between ASCII and String format.

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AT+CONVFORM ( Max length: 80 bytes)

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(% style="color:blue" %)**Example:**

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1) AT+CONVFORM=0, string Convert String from String to ASCII

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[[image:1675214845056-885.png]]

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2) AT+CONVFORM=1, ASCII Convert ASCII to String.

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[[image:1675214856590-846.png]]

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=== 2.3.4 Define periodically SDI-12 commands and uplink. ===

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AT+COMMANDx & AT+DATACUTx

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User can define max 15 SDI-12 Commands (AT+COMMAND1 ~~ AT+COMMANDF). On each uplink period (TDC time, default 20 minutes), SDI-12-LB will send these SDI-12 commands and wait for return from SDI-12 sensors. SDI-12-LB will then combine these returns and uplink via LoRaWAN.

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* (% style="color:blue" %)**AT Command:**

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(% style="color:#037691" %)**AT+COMMANDx=var1,var2,var3,var4.**

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(% style="color:red" %)**var1**(%%): SDI-12 command , for example: 0RC0!

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(% style="color:red" %)**var2**(%%): Wait timeout for return. (unit: second)

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(% style="color:red" %)**var3**(%%): Whether to send //addrD0!// to get return after var2 timeout. 0: Don't Send //addrD0! //; 1: Send //addrD0!//.

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(% style="color:red" %)**var4**(%%): validation check for return. If return invalid, SDI-12-LB will resend this command. Max 3 retries.

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(% style="color:red" %)**0 **(%%) No validation check;

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(% style="color:red" %)**1** (%%) Check if return chars are printable char(0x20 ~~ 0x7E);

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(% style="color:red" %)**2**(%%) Check if there is return from SDI-12 sensor

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(% style="color:red" %)**3** (%%) Check if return pass CRC check ( SDI-12 command var1 must include CRC request);

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Each AT+COMMANDx is followed by a (% style="color:blue" %)**AT+DATACUT**(%%) command. AT+DATACUT command is used to take the useful string from the SDI-12 sensor so the final payload will have the minimum length to uplink.

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(% style="color:blue" %)**AT+DATACUTx**(%%) : This command defines how to handle the return from AT+COMMANDx, max return length is 100 bytes.

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(% border="1" style="background-color:#f7faff; width:436px" %)

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|(% style="width:433px" %)(((

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**AT+DATACUTx=a,b,c**

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**a**: length for the return of AT+COMMAND

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**b**: 1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.

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**c**: define the position for valid value.

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For example, if return from AT+COMMAND1 is “013METER TER12 112T12-00024895<CR><LF>” , Below AT+DATACUT1 will get different result to combine payload:

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(% border="1" cellspacing="4" style="background-color:#f7faff; width:510px" %)

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|=(% style="width: 164px;" %)**AT+DATACUT1 value**|=(% style="width: 344px;" %)**Final Result to combine Payload**

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|(% style="width:164px" %)34,1,1+2+3|(% style="width:344px" %)0D 00 01 30 31 33

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|(% style="width:164px" %)34,2,1~~8+12~~16|(% style="width:344px" %)0D 00 01 30 31 33 4D 45 54 45 52 54 45 52 31 32

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|(% style="width:164px" %)34,2,1~~34|(% style="width:344px" %)0D 00 01 30 31 33 4D 45 54 45 52 20 20 20 54 45 52 31 32 20 31 31 32 54 31 32 2D 30 30 30 32 34 38 39 35 0D 0A

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* (% style="color:blue" %)** Downlink Payload:**

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(% style="color:blue" %)**0xAF**(%%) downlink command can be used to set AT+COMMANDx or AT+DATACUTx.

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(% style="color:red" %)**Note : if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**

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Format: ** (% style="color:#037691" %)AF MM NN LL XX XX XX XX YY(%%)**

Where:

* (% style="color:#037691" %)**MM **(%%): the AT+COMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,

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* (% style="color:#037691" %)**NN **(%%): 1: set the AT+COMMAND value ; 2: set the AT+DATACUT value.

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* (% style="color:#037691" %)**LL **(%%): The length of AT+COMMAND or AT+DATACUT command

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* (% style="color:#037691" %)**XX XX XX XX **(%%): AT+COMMAND or AT+DATACUT command

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* (% style="color:#037691" %)**YY **(%%): If YY=0, SDI-12-LB will execute the downlink command without uplink; if YY=1, SDI-12-LB will execute an uplink after got this command.

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(% style="color:blue" %)**Example:**

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[[image:image-20230201094129-18.png]]

(% style="color:blue" %)**Clear SDI12 Command**

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The AT+COMMANDx and AT+DATACUTx settings are stored in special location, user can use below command to clear them.

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* (% style="color:#037691" %)**AT Command:**

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(% style="color:#4f81bd" %)**AT+CMDEAR=mm,nn** (%%) mm: start position of erase ,nn: stop position of erase

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Etc. AT+CMDEAR=1,10 means erase AT+COMMAND1/AT+DATACUT1 to AT+COMMAND10/AT+DATACUT10

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* (% style="color:#037691" %)** Downlink Payload:**

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(% style="color:#4f81bd" %)**0x09 aa bb**(%%) same as AT+CMDEAR=aa,bb

(% style="color:blue" %)**command combination**

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Below shows a screen shot how the results combines together to a uplink payload.

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[[image:1675215745275-920.png]]

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If user don't want to use DATACUT for some command, he simply want to uplink all returns. AT+ALLDATAMOD can be set to 1.

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(% style="color:blue" %)**AT+ALLDATAMOD**(%%) will simply get all return and don't do CRC check as result for SDI-12 command. AT+DATACUTx command has higher priority, if AT+DATACUTx has been set, AT+ALLDATAMOD will be ignore for this SDI-12 command.

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(% style="color:#4f81bd" %)**For example: **(%%) as below photo, AT+ALLDATAMOD=1, but AT+DATACUT1 has been set, AT+DATACUT1 will be still effect the result.

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[[image:1675215782925-448.png]]

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If AT+ALLDATAMOD=1, (% style="color:#4f81bd" %)**FX,X**(%%) will be added in the payload, FX specify which command is used and X specify the length of return. for example in above screen, F1 05 means the return is from AT+COMMAND1 and the return is 5 bytes.

(% style="color:blue" %)**Compose Uplink**

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(% style="color:#4f81bd" %)**AT+DATAUP=0**

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Compose the uplink payload with value returns in sequence and send with **__A SIGNLE UPLINK__**.

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Final Payload is **__Battery Info+PAYVER + VALID Value from RETURN1 + Valid Value from RETURN2 + … + RETURNx__**

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Where PAYVER is defined by AT+PAYVER, below is an example screen shot.

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[[image:1675215828102-844.png]]

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(% style="color:#4f81bd" %)**AT+DATAUP=1**

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Compose the uplink payload with value returns in sequence and send with **__Multiply UPLINKs__**.

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Final Payload is __**Battery Info+PAYVER + PAYLOAD COUNT + PAYLOAD# + DATA**__

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1. Battery Info (2 bytes): Battery voltage

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1. PAYVER (1 byte): Defined by AT+PAYVER

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1. PAYLOAD COUNT (1 byte): Total how many uplinks of this sampling.

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1. PAYLOAD# (1 byte): Number of this uplink. (from 0,1,2,3…,to PAYLOAD COUNT)

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1. DATA: Valid value: max 6 bytes(US915 version here, Notice*!) for each uplink so each uplink <= 11 bytes. For the last uplink, DATA will might less than 6 bytes

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[[image:1675215848113-696.png]]

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(% style="color:red" %)**Notice: the Max bytes is according to the max support bytes in different Frequency Bands for lowest SF. As below:**

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* For AU915/AS923 bands, if UplinkDwell time=0, max 51 bytes for each uplink ( so 51 -5 = 46 max valid date)

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* For AU915/AS923 bands, if UplinkDwell time=1, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).

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* For US915 band, max 11 bytes for each uplink ( so 11 -5 = 6 max valid date).

601

* For all other bands: max 51 bytes for each uplink ( so 51 -5 = 46 max valid date).

602

603

(% style="color:red" %)**When AT+DATAUP=1, the maximum number of segments is 15, and the maximum total number of bytes is 1500;**

604

605

(% style="color:red" %)**When AT+DATAUP=1 and AT+ADR=0, the maximum number of bytes of each payload is determined by the DR value.**

606

607

608

== 2.4 Uplink Payload ==

609

610

=== 2.4.1 Device Payload, FPORT~=5 ===

611

612

613

Include device configure status. Once SDI-12-LB Joined the network, it will uplink this message to the server.

614

615

Users can also use the downlink command(0x26 01) to ask SDI-12-LB to resend this uplink.

616

617

(% border="1" cellspacing="4" style="background-color:#f7faff; width:420px" %)

618

|(% colspan="6" style="width:434px" %)**Device Status (FPORT=5)**

Example parse in TTNv3

623

624

[[image:1675215946738-635.png]]

625

626

627

(% style="color:#037691" %)**Sensor Model**(%%): For SDI-12-LB, this value is 0x17

628

629

(% style="color:#037691" %)**Firmware Version**(%%): 0x0100, Means: v1.0.0 version

630

631

(% style="color:#037691" %)**Frequency Band**:

*0x01: EU868

*0x02: US915

*0x03: IN865

*0x04: AU915

*0x05: KZ865

*0x06: RU864

*0x07: AS923

*0x08: AS923-1

*0x09: AS923-2

*0x0a: AS923-3

*0x0b: CN470

*0x0c: EU433

*0x0d: KR920

*0x0e: MA869

(% style="color:#037691" %)**Sub-Band**:

663

664

AU915 and US915:value 0x00 ~~ 0x08

665

666

CN470: value 0x0B ~~ 0x0C

667

668

Other Bands: Always 0x00

669

670

671

(% style="color:#037691" %)**Battery Info**:

672

673

Check the battery voltage.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

=== 2.4.2 Uplink Payload, FPORT~=2 ===

681

682

683

There are different cases for uplink. See below

684

685

* SDI-12 Debug Command return: FPORT=100

686

687

* Periodically Uplink: FPORT=2

688

689

(% border="1" cellspacing="4" style="background-color:#f7faff; width:500px" %)

690

|=(% style="width: 90px;" %)(((

691

**Size(bytes)**

692

)))|=(% style="width: 80px;" %)**2**|=(% style="width: 90px;" %)**1**|=(% style="width: 240px;" %)**Length depends on the return from the commands**

693

|(% style="width:93px" %)**Value**|(% style="width:83px" %)(((

Battery(mV)

&

Interrupt_Flag

)))|(% style="width:91px" %)[[PAYLOAD_VER>>||anchor="H3.6Setthepayloadversion"]]|(% style="width:212px" %)(((

698

If the valid payload is too long and exceed the maximum support.

699

Payload length in server,server will show payload not provided in the LoRaWAN server.

700

)))

701

702

[[image:1675216282284-923.png]]

703

704

705

=== 2.4.3 Battery Info ===

706

707

708

Check the battery voltage for SDI-12-LB.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

=== 2.4.4 Interrupt Pin ===

716

717

718

This data field shows if this packet is generated by (% style="color:#037691" %)**Interrupt Pin**(%%) or not. [[Click here>>||anchor="H3.2SetInterruptMode"]] for the hardware and software set up. Note: The Internet Pin is a separate pin in the screw terminal. See [[pin mapping>>||anchor="H1.7PinMapping"]].

**Example:**

Ex1: 0x0B45:0x0B&0x80= 0x00 Normal uplink packet.

723

724

Ex2: 0x8B49:0x8B&0x80= 0x80 Interrupt Uplink Packet.

725

726

727

=== 2.4.5 Payload version ===

728

729

The version number of the payload, mainly used for decoding. The default is 01.

730

731

732

=== 2.4.6 Decode payload in The Things Network ===

733

734

735

While using TTN network, you can add the payload format to decode the payload.

736

737

[[image:1675216779406-595.png]]

738

739

740

There is no fix payload decoder in LoRaWAN server because the SDI-12 sensors returns are different. User need to write the decoder themselves for their case.

741

742

SDI-12-LB TTN Payload Decoder: [[https:~~/~~/github.com/dragino/dragino-end-node-decoder>>url:https://github.com/dragino/dragino-end-node-decoder]]

743

744

745

== 2.5 Uplink Interval ==

746

747

748

The SDI-12-LB by default uplink the sensor data every 20 minutes. User can change this interval by AT Command or LoRaWAN Downlink Command. See this link:

749

750

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H4.1ChangeUplinkInterval>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/#H4.1ChangeUplinkInterval]]

751

752

753

== 2.6 Examples To Set SDI commands. ==

754

755

=== 2.6.1 Examples 1 ===

756

757

758

COM port and SDI-12 sensor communication converted to SDI-12-LB and SDI-12 sensor communication.

759

760

[[image:image-20230222143809-1.png||height="564" width="729"]]

761

762

763

(% style="color:blue" %)**1) The AT+COMMANDx command is applied to the red arrow part, and sends the SDI12 command to the SDI12 sensor:**

764

765

a. Send the first command and get the first reply：

766

767

(% style="color:#037691" %)**AT+COMMANDx=1I!,0,0,1**

768

769

b. Send the second command and get the second reply：

770

771

(% style="color:#037691" %)**AT+COMMANDx=2I!,0,0,1**

772

773

c. Send the third command and get the third reply：

774

775

(% style="color:#037691" %)**AT+COMMANDx=3I!,0,0,1**

776

777

d. Send the fourth command and get the fourth reply：

778

779

(% style="color:#037691" %)**AT+COMMANDx=4I!,0,0,1**

780

781

e. Send the fifth command plus the sixth command, get the sixth reply：

782

783

(% style="color:#037691" %)**AT+COMMANDx=1M!,2,1,1**

784

785

f. Send the seventh command plus the eighth command, get the eighth reply：

786

787

(% style="color:#037691" %)**AT+COMMANDx=2M!,2,1,1**

788

789

g. Send the ninth command plus the tenth command, get the tenth reply：

790

791

(% style="color:#037691" %)**AT+COMMANDx=3M!,1,1,1**

792

793

h. Send the eleventh command plus the twelfth command, get the twelfth reply：

794

795

(% style="color:#037691" %)**AT+COMMANDx=4M!,1,1,1**

796

797

798

(% style="color:blue" %)**2) The AT+DATACUTx command is applied to the green arrow part, receiving and cut out data from the SDI12 sensor：**

799

800

a. The first reply, all 34 characters: ”113TRUEBNERSMT100038220303182331<CR><LF>”

801

802

Cut out all characters: (% style="color:#037691" %)**AT+ALLDATAMOD=1 or AT+DATACUTx=34,2,1~~34**;

803

804

b. The sixth reply, all 31 characters：”1+19210+1.04+0.00+22.49+11.75<CR><LF>”

805

806

Cut out all characters: (% style="color:#037691" %)**AT+ALLDATAMOD=1 or AT+DATACUTx=31,2,1~~31**;

807

808

c. The eighth reply, all 31 characters：”2+18990+1.08+0.00+22.24+11.80<CR><LF>”

809

810

Cut out all characters: (% style="color:#037691" %)**AT+ALLDATAMOD=1 or AT+DATACUTx=31,2,1~~31**;

811

812

d. The tenth reply, all 15 characters：”3-2919.8+24.0<CR><LF>”

813

814

Cut out all characters: (% style="color:#037691" %)**AT+ALLDATAMOD=1 or AT+DATACUTx=15,2,1~~15**;

815

816

e. The twelfth reply, all 25 characters：”4+30.8+22.84+4.7+954.38<CR><LF>”

817

818

Partial cut, the cut sensor address and the first two parameters：(% style="color:#037691" %)**AT+DATACUTx=25,2,1~~12, cut out the character field ” 4+30.8+22.84”**.

819

820

821

== 2.7 Frequency Plans ==

822

823

824

The SDI-12-LB uses OTAA mode and below frequency plans by default. If user want to use it with different frequency plan, please refer the AT command sets.

825

826

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20Frequency%20Band/]]

827

828

829

== 2.8 Firmware Change Log ==

830

831

832

**Firmware download link:**

833

834

[[https:~~/~~/www.dropbox.com/sh/qrbgbikb109lkiv/AACBR-v_ZhZAMengcY7Nsa1ja?dl=0>>https://www.dropbox.com/sh/qrbgbikb109lkiv/AACBR-v_ZhZAMengcY7Nsa1ja?dl=0]]

835

836

837

= 3. Configure SDI-12-LB via AT Command or LoRaWAN Downlink =

838

839

840

Use can configure SDI-12-LB via AT Command or LoRaWAN Downlink.

841

842

* AT Command Connection: See [[FAQ>>||anchor="H7.FAQ"]].

843

* LoRaWAN Downlink instruction for different platforms: See [[IoT LoRaWAN Server>>http://wiki.dragino.com/xwiki/bin/view/Main/]] section.

844

845

There are two kinds of commands to configure SDI-12-LB, they are:

846

847

* (% style="color:blue" %)**General Commands**.

848

849

These commands are to configure:

850

851

* General system settings like: uplink interval.

852

* LoRaWAN protocol & radio related command.

853

854

They are same for all Dragino Device which support DLWS-005 LoRaWAN Stack. These commands can be found on the wiki:

855

856

[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/>>http://wiki.dragino.com/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]

857

858

859

* (% style="color:blue" %)**Commands special design for SDI-12-LB**

860

861

These commands only valid for SDI-12-LB, as below:

862

863

864

== 3.1 Set Transmit Interval Time ==

865

866

867

Feature: Change LoRaWAN End Node Transmit Interval.

868

869

(% style="color:blue" %)**AT Command: AT+TDC**

870

871

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)

872

|=(% style="width: 156px;" %)**Command Example**|=(% style="width: 137px;" %)**Function**|=**Response**

873

|(% style="width:156px" %)AT+TDC=?|(% style="width:137px" %)Show current transmit Interval|(((

874

30000

875

OK

876

the interval is 30000ms = 30s

877

)))

878

|(% style="width:156px" %)AT+TDC=60000|(% style="width:137px" %)Set Transmit Interval|(((

879

OK

880

Set transmit interval to 60000ms = 60 seconds

881

)))

882

883

(% style="color:blue" %)**Downlink Command: 0x01**

884

885

886

Format: Command Code (0x01) followed by 3 bytes time value.

887

888

If the downlink payload=0100003C, it means set the END Node's Transmit Interval to 0x00003C=60(S), while type code is 01.

889

890

* Example 1: Downlink Payload: 0100001E ~/~/ Set Transmit Interval (TDC) = 30 seconds

891

* Example 2: Downlink Payload: 0100003C ~/~/ Set Transmit Interval (TDC) = 60 seconds

892

893

== 3.2 Set Interrupt Mode ==

894

895

896

Feature, Set Interrupt mode for GPIO_EXIT.

897

898

(% style="color:blue" %)**AT Command: AT+INTMOD**

899

900

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:510px" %)

901

|=(% style="width: 156px;" %)**Command Example**|=(% style="width: 187px;" %)**Function**|=(% style="width: 165px;" %)**Response**

902

|(% style="width:156px" %)AT+INTMOD=?|(% style="width:187px" %)Show current interrupt mode|(% style="width:165px" %)(((

903

0

904

OK

905

the mode is 0 = Disable Interrupt

906

)))

907

|(% style="width:156px" %)AT+INTMOD=2|(% style="width:187px" %)(((

908

Set Transmit Interval

909

0. (Disable Interrupt),

910

~1. (Trigger by rising and falling edge)

911

2. (Trigger by falling edge)

912

3. (Trigger by rising edge)

913

)))|(% style="width:165px" %)OK

914

915

(% style="color:blue" %)**Downlink Command: 0x06**

916

917

Format: Command Code (0x06) followed by 3 bytes.

918

919

This means that the interrupt mode of the end node is set to 0x000003=3 (rising edge trigger), and the type code is 06.

920

921

* Example 1: Downlink Payload: 06000000 ~/~/ Turn off interrupt mode

922

* Example 2: Downlink Payload: 06000003 ~/~/ Set the interrupt mode to rising edge trigger

923

924

== 3.3 Set the output time ==

925

926

927

Feature, Control the output 3V3 , 5V or 12V.

928

929

(% style="color:blue" %)**AT Command: AT+3V3T**

930

931

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:474px" %)

932

|=(% style="width: 154px;" %)**Command Example**|=(% style="width: 201px;" %)**Function**|=(% style="width: 116px;" %)**Response**

933

|(% style="width:154px" %)AT+3V3T=?|(% style="width:201px" %)Show 3V3 open time.|(% style="width:116px" %)(((

0

OK

)))

|(% style="width:154px" %)AT+3V3T=0|(% style="width:201px" %)Normally open 3V3 power supply.|(% style="width:116px" %)(((

OK

default setting

)))

|(% style="width:154px" %)AT+3V3T=1000|(% style="width:201px" %)Close after a delay of 1000 milliseconds.|(% style="width:116px" %)(((

942

OK

943

)))

944

|(% style="width:154px" %)AT+3V3T=65535|(% style="width:201px" %)Normally closed 3V3 power supply.|(% style="width:116px" %)(((

OK

)))

(% style="color:blue" %)**AT Command: AT+5VT**

949

950

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:470px" %)

951

|=(% style="width: 155px;" %)**Command Example**|=(% style="width: 196px;" %)**Function**|=(% style="width: 114px;" %)**Response**

952

|(% style="width:155px" %)AT+5VT=?|(% style="width:196px" %)Show 5V open time.|(% style="width:114px" %)(((

0

OK

)))

|(% style="width:155px" %)AT+5VT=0|(% style="width:196px" %)Normally closed 5V power supply.|(% style="width:114px" %)(((

OK

default setting

)))

|(% style="width:155px" %)AT+5VT=1000|(% style="width:196px" %)Close after a delay of 1000 milliseconds.|(% style="width:114px" %)(((

961

OK

962

)))

963

|(% style="width:155px" %)AT+5VT=65535|(% style="width:196px" %)Normally open 5V power supply.|(% style="width:114px" %)(((

OK

)))

(% style="color:blue" %)**AT Command: AT+12VT**

968

969

(% border="1" cellspacing="4" style="background-color:#f7faff; color:black; width:443px" %)

970

|=(% style="width: 156px;" %)**Command Example**|=(% style="width: 199px;" %)**Function**|=(% style="width: 83px;" %)**Response**

971

|(% style="width:156px" %)AT+12VT=?|(% style="width:199px" %)Show 12V open time.|(% style="width:83px" %)(((

0

OK

)))

|(% style="width:156px" %)AT+12VT=0|(% style="width:199px" %)Normally closed 12V power supply.|(% style="width:83px" %)OK

976

|(% style="width:156px" %)AT+12VT=500|(% style="width:199px" %)Close after a delay of 500 milliseconds.|(% style="width:83px" %)(((

OK

)))

(% style="color:blue" %)**Downlink Command: 0x07**

981

982

Format: Command Code (0x07) followed by 3 bytes.

983

984

The first byte is which power, the second and third bytes are the time to turn on.

985

986

* Example 1: Downlink Payload: 070101F4 **~-~-->** AT+3V3T=500

987

* Example 2: Downlink Payload: 0701FFFF **~-~-->** AT+3V3T=65535

988

* Example 3: Downlink Payload: 070203E8 **~-~-->** AT+5VT=1000

989

* Example 4: Downlink Payload: 07020000 **~-~-->** AT+5VT=0

990

* Example 5: Downlink Payload: 070301F4 **~-~-->** AT+12VT=500

991

* Example 6: Downlink Payload: 07030000 **~-~-->** AT+12VT=0

992

993

== 3.4 Set the all data mode ==

994

995

996

Feature, Set the all data mode.

997

998

(% style="color:blue" %)**AT Command: AT+ALLDATAMOD**

999

1000

(% border="1" cellspacing="4" style="background-color:#f7faff; width:437px" %)

1001

|=**Command Example**|=**Function**|=**Response**

1002

|AT+ALLDATAMOD=?|Show current all data mode|(((

0

OK

)))

|AT+ALLDATAMOD=1|Set all data mode is 1.|OK

1007

1008

(% style="color:blue" %)**Downlink Command: 0xAB**

1009

1010

Format: Command Code (0xAB) followed by 1 bytes.

1011

1012

* Example 1: Downlink Payload: AB 00 ~/~/ AT+ALLDATAMOD=0

1013

* Example 2: Downlink Payload: AB 01 ~/~/ AT+ALLDATAMOD=1

1014

1015

== 3.5 Set the splicing payload for uplink ==

1016

1017

1018

Feature, splicing payload for uplink.

1019

1020

(% style="color:blue" %)**AT Command: AT+DATAUP**

1021

1022

(% border="1" cellspacing="4" style="background-color:#f7faff; width:510px" %)

1023

|=(% style="width: 154px;" %)**Command Example**|=(% style="width: 266px;" %)**Function**|=**Response**

1024

|(% style="width:154px" %)AT+DATAUP =?|(% style="width:266px" %)Show current splicing payload for uplink mode|(((

0

OK

)))

|(% style="width:154px" %)AT+DATAUP =0|(% style="width:266px" %)(((

1029

Set splicing payload for uplink mode is 0.

)))|(((

OK

)))

|(% style="width:154px" %)AT+DATAUP =1|(% style="width:266px" %)Set splicing payload for uplink mode is 1 , and the each splice uplink is sent sequentially.|OK

1034

|(% style="width:154px" %)AT+DATAUP =1,20000|(% style="width:266px" %)(((

1035

Set splicing payload for uplink mode is 1, and the uplink interval of each splice to 20000 milliseconds.

1036

)))|OK

1037

1038

(% style="color:blue" %)**Downlink Command: 0xAD**

1039

1040

Format: Command Code (0xAD) followed by 1 bytes or 5 bytes.

1041

1042

* Example 1: Downlink Payload: AD 00 ~/~/ AT+DATAUP=0

1043

* Example 2: Downlink Payload: AD 01 ~/~/ AT+DATAUP =1

1044

* Example 3: Downlink Payload: AD 01 00 00 14 ~/~/ AT+DATAUP =1,20000

1045

1046

This means that the interval is set to 0x000014=20S

1047

1048

1049

== 3.6 Set the payload version ==

1050

1051

1052

Feature, Set the payload version.

1053

1054

(% style="color:blue" %)**AT Command: AT+PAYVER**

1055

1056

(% border="1" cellspacing="4" style="background-color:#f7faff; width:437px" %)

1057

|=(% style="width: 158px;" %)**Command Example**|=(% style="width: 192px;" %)**Function**|=**Response**

1058

|(% style="width:158px" %)AT+PAYVER=?|(% style="width:192px" %)Show current payload version|(((

1

OK

)))

|(% style="width:158px" %)AT+PAYVER=5|(% style="width:192px" %)Set payload version is 5.|OK

1063

1064

(% style="color:blue" %)**Downlink Command: 0xAE**

1065

1066

Format: Command Code (0xAE) followed by 1 bytes.

1067

1068

* Example 1: Downlink Payload: AE 01 ~/~/ AT+PAYVER=1

1069

* Example 2: Downlink Payload: AE 05 ~/~/ AT+PAYVER=5

1070

1071

= 4. Battery & how to replace =

1072

1073

== 4.1 Battery Type ==

1074

1075

1076

SDI-12-LB is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>https://www.dropbox.com/sh/w9l2oa3ytpculph/AAAPtt-apH4lYfCj-2Y6lHvQa?dl=0]]. The battery is un-rechargeable battery with low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter.

1077

1078

1079

The discharge curve is not linear so can’t simply use percentage to show the battery level. Below is the battery performance.

1080

1081

[[image:1675234124233-857.png]]

1082

1083

1084

Minimum Working Voltage for the SDI-12-LB:

1085

1086

SDI-12-LB: 2.45v ~~ 3.6v

1087

1088

1089

== 4.2 Replace Battery ==

1090

1091

1092

Any battery with range 2.45 ~~ 3.6v can be a replacement. We recommend to use Li-SOCl2 Battery.

1093

1094

And make sure the positive and negative pins match.

1095

1096

1097

== 4.3 Power Consumption Analyze ==

1098

1099

1100

Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.

1101

1102

Instruction to use as below:

1103

1104

(% style="color:blue" %)**Step 1:**(%%) Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from: [[https:~~/~~/www.dropbox.com/sh/zwex6i331j5oeq2/AACIMf9f_v2qsJ39CuMQ5Py_a?dl=0>>https://www.dropbox.com/sh/zwex6i331j5oeq2/AACIMf9f_v2qsJ39CuMQ5Py_a?dl=0]]

1105

1106

(% style="color:blue" %)**Step 2:**(%%) Open it and choose

* Product Model

* Uplink Interval

* Working Mode

And the Life expectation in difference case will be shown on the right.

1113

1114

1115

[[image:1675234155374-163.png]]

1116

1117

1118

The battery related documents as below:

1119

1120

* [[Battery Dimension>>https://www.dropbox.com/s/ox5g9njwjle7aw3/LSN50-Battery-Dimension.pdf?dl=0]],

1121

* [[Lithium-Thionyl Chloride Battery datasheet, Tech Spec>>https://www.dropbox.com/sh/d4oyfnp8o94180o/AABQewCNSh5GPeQH86UxRgQQa?dl=0]]

1122

* [[Lithium-ion Battery-Capacitor datasheet>>https://www.dropbox.com/s/791gjes2lcbfi1p/SPC_1520_datasheet.jpg?dl=0]], [[Tech Spec>>https://www.dropbox.com/s/4pkepr9qqqvtzf2/SPC1520%20Technical%20Specification20171123.pdf?dl=0]]

1123

1124

[[image:image-20230201145019-19.png]]

1125

1126

1127

=== 4.3.1 Battery Note ===

1128

1129

1130

The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.

1131

1132

1133

=== 4.3.2 Replace the battery ===

1134

1135

1136

You can change the battery in the SDI-12-LB.The type of battery is not limited as long as the output is between 3v to 3.6v. On the main board, there is a diode (D1) between the battery and the main circuit. If you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so there won't be voltage drop between battery and main board.

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The default battery pack of SDI-12-LB includes a ER26500 plus super capacitor. If user can't find this pack locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the battery life for high frequency use (update period below 5 minutes)

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= 5. Remote Configure device =

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== 5.1 Connect via BLE ==

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Please see this instruction for how to configure via BLE: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]]

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== 5.2 AT Command Set ==

= 6. OTA firmware update =

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Please see this link for how to do OTA firmware update.

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[[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/>>url:http://wiki.dragino.com/xwiki/bin/view/Main/Firmware%20OTA%20Update%20for%20Sensors/]]

= 7. FAQ =

== 7.1 How to use AT Command to access device? ==

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See: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]

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== 7.2 How to update firmware via UART port? ==

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See: [[http:~~/~~/wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H1.LoRaSTv4baseHardware]]

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== 7.3 How to change the LoRa Frequency Bands/Region? ==

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You can follow the instructions for [[how to upgrade image>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]].

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When downloading the images, choose the required image file for download.

= 8. Order Info =

(((

(% style="color:blue" %)**Part Number: SDI-12-LB-XXX**

)))

(((

XXX: The default frequency band

)))

(((

(% style="color:red" %)**AS923**(%%): LoRaWAN AS923 band

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(% style="color:red" %)**AU915**(%%): LoRaWAN AU915 band

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(% style="color:red" %)**EU433**(%%): LoRaWAN EU433 band

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(% style="color:red" %)**EU868**(%%): LoRaWAN EU868 band

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(% style="color:red" %)**KR920**(%%): LoRaWAN KR920 band

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(% style="color:red" %)**US915**(%%): LoRaWAN US915 band

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(% style="color:red" %)**IN865**(%%): LoRaWAN IN865 band

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(% style="color:red" %)**CN470**(%%): LoRaWAN CN470 band

)))

= 9. Packing Info =

(% style="color:#037691" %)**Package Includes**:

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* SDI-12-LB SDI-12 to LoRaWAN Converter x 1

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(% style="color:#037691" %)**Dimension and weight**:

* Device Size: cm

* Device Weight: g

* Package Size / pcs : cm

* Weight / pcs : g

= 10. Support =

* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.

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* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:http://../../../../../../D:%5C%E5%B8%82%E5%9C%BA%E8%B5%84%E6%96%99%5C%E8%AF%B4%E6%98%8E%E4%B9%A6%5CLoRa%5CLT%E7%B3%BB%E5%88%97%5Csupport@dragino.com]]

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Wiki source code of SDI-12-LB -- SDI-12 to LoRaWAN Converter User Manual