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

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 **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 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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**Micro Controller:**

* MCU: 48Mhz ARM

* Flash: 256KB

* RAM: 64KB

**Common DC Characteristics:**

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* Supply Voltage: 2.5v ~~ 3.6v

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* Operating Temperature: -40 ~~ 85°C

**LoRa Spec:**

* 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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**Current Input Measuring :**

* Range: 0 ~~ 20mA

* Accuracy: 0.02mA

* Resolution: 0.001mA

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**Voltage Input Measuring:**

* Range: 0 ~~ 30v

* Accuracy: 0.02v

* Resolution: 0.001v

**Battery:**

* 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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**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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**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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**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]]

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

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|=(% style="width: 167px;" %)**Behavior on ACT**|=(% style="width: 117px;" %)**Function**|=(% style="width: 225px;" %)**Action**

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|(% style="width:167px" %)Pressing ACT between 1s < time < 3s|(% style="width:117px" %)Send an uplink|(% style="width:225px" %)(((

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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:117px" %)Active Device|(% style="width:225px" %)(((

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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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)))

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|(% style="width:167px" %)Fast press ACT 5 times.|(% style="width:117px" %)Deactivate Device|(% style="width:225px" %)(% style="color:red" %)**Red led**(%%) will solid on for 5 seconds. Means PS-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 **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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**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-20230131134744-2.jpeg]]

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

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**Register the device**

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[[image:1675213652444-622.png]]

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**Add APP EUI and DEV EUI**

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[[image:1675213661769-223.png]]

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**Add APP EUI in the application**

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[[image:1675213675852-577.png]]

**Add APP KEY**

[[image:1675213686734-883.png]]

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**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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**Green led** will fast blink 5 times, device will enter **OTA mode** for 3 seconds. And then start to JOIN LoRaWAN network. **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.

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

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

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==== **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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**Parameter: **aa: ASCII value of SDI-12 sensor address in downlink or HEX value in AT Command)

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**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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==== **aM!,aMC!, aM1!- aM9!, aMC1!- aMC9!** ====

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**aM! **: Start Non-Concurrent Measurement

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**aMC! **: Start Non-Concurrent Measurement – Request CRC

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**aM1!- aM9! **: Additional Measurements

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**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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**aa**: SDI-12 sensor address.

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**bb**: 0: no CRC, 1: request CRC

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**cc**: 1-9: Additional Measurement, 0: no additional measurement

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**dd**: delay (in second) to send **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"]]

==== **aC!, aCC!, aC1!- aC9!, aCC1!- aCC9! ** ====

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**aC!** : Start Concurrent Measurement

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**aCC!** : Start Concurrent Measurement – Request CRC

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**aC1!- aC9!** : Start Additional Concurrent Measurements

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**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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**aa**: SDI-12 sensor address.

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**bb**: 0: no CRC, 1: request CRC

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**cc**: 1-9: Additional Measurement, 0: no additional measurement

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**dd**: delay (in second) to send **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"]]

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(% style="display:none" %) (%%)

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==== **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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**aa**: SDI-12 sensor address.

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**bb**: 0: no CRC, 1: request CRC

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**cc**: 1-9: Additional Measurement, 0: no additional measurement

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**dd**: delay (in second) to send **aD0!** to get return.

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

[[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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**aa **: total SDI-12 command length

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**xx **: SDI-12 command

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**bb **: Delay to wait for return

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**cc **: 0: don't uplink return to LoRaWAN, 1: Uplink return to LoRaWAN on FPORT=100

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**Example: **AT+CFGDEV =0RC0!,1

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**0RC0! **: SDI-12 Command,

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**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"]]

=== 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)

**Example:**

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]]

=== 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.

* ** AT Command:**

**AT+COMMANDx=var1,var2,var3,var4.**

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**var1**: SDI-12 command , for example: 0RC0!

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**var2**: Wait timeout for return. (unit: second)

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**var3**: Whether to send //addrD0!// to get return after var2 timeout. 0: Don't Send //addrD0! //; 1: Send //addrD0!//.

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**var4**: validation check for return. If return invalid, SDI-12-LB will resend this command. Max 2 retries.

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**0 ** No validation check;

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**1** Check if return chars are printable char(0x20 ~~ 0x7E);

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**2** Check if there is return from SDI-12 sensor

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**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 **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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**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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)))

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

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|AT+DATACUT1 value|Final Result to combine Payload

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|34,1,1+2+3|0D 00 01 30 31 33

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|34,2,1~~8+12~~16|0D 00 01 30 31 33 4D 45 54 45 52 54 45 52 31 32

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|34,2,1~~34|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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* ** Downlink Payload:**

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**0xAF** downlink command can be used to set AT+COMMANDx or AT+DATACUTx.

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**Note : if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.**

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Format: ** AF MM NN LL XX XX XX XX YY**

Where:

* MM: the AT+COMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,

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* NN: 1: set the AT+DATACUT value ; 2: set the AT+DATACUT value.

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* LL: The length of AT+COMMAND or AT+DATACUT command

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* XX XX XX XX: AT+COMMAND or AT+DATACUT command

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* YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN will execute an uplink after got this command.

Example:

**AF 03 01 07 30 4D 43 21 01 01 01 00**: Same as AT+COMMAND3=**0MC!**,** 1**,** 1**,** 1**

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**AF 03 02 06 10 01 05 06 09 0A 00**: Same as AT+DATACUT3=**16**,**1**,**5+6+9+10**

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**AF 03 02 06 0B 02 05 07 08 0A 00**: Same as AT+DATACUT3=**11**,**2**,**5~~7+8~~10**

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**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.

* ** AT Command:**

**~ 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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* ** Downlink Payload:**

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**~ 0x09 aa bb** same as AT+CMDEAR=aa,bb

**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:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.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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**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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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:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]

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If AT+ALLDATAMOD=1, **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.

**Compose Uplink**

**AT+DATAUP=0**

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:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]

**AT+DATAUP=1**

Compose the uplink payload with value returns in sequence and send with Multiply UPLINKs.

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:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]]

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**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).

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

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*** When AT+DATAUP=1, the maximum number of segments is 15, and the maximum total number of bytes is 1500;**

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**~ When AT+DATAUP=1 and AT+ADR=0, the maximum number of bytes of each payload is determined by the DR value.**

1.

11. Uplink Payload

Uplink payloads have two types:

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* Distance Value: Use FPORT=2

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* Other control commands: Use other FPORT fields.

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The application server should parse the correct value based on FPORT settings.

1.

11.

111. Device Payload, FPORT=5

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

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

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|(% colspan="6" %)**Device Status (FPORT=5)**

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|**Size (bytes)**|**1**|**2**|**1**|**1**|**2**

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Example parse in TTNv3

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]]

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**Sensor Model**: For SDI-12-LB, this value is 0x17

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**Firmware Version**: 0x0100, Means: v1.0.0 version

**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

**Sub-Band**:

AU915 and US915:value 0x00 ~~ 0x08

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CN470: value 0x0B ~~ 0x0C

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Other Bands: Always 0x00

**Battery Info**:

Check the battery voltage.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

1.

11.

111. Uplink Payload, FPORT=2

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There are different cases for uplink. See below

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* SDI-12 Debug Command return: FPORT=100

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* Periodically Uplink: FPORT=2

|(((

**Size**

**(bytes)**

)))|**2**|**1**|**Length depends on the return from the commands**

|**Value**|(((

Battery(mV)

&

Interrupt_Flag

)))|[[PAYLOAD_VER>>path:#Probe_Model]]|(((

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

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

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)))

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]]

1.

11.

111. Battery Info

Check the battery voltage for SDI-12-LB.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

1.

11.

111. Interrupt Pin

This data field shows if this packet is generated by **Interrupt Pin** or not. [[Click here>>path:#Int_mod]] for the hardware and software set up. Note: The Internet Pin is a separate pin in the screw terminal. See [[pin mapping>>path:#pins]].

Example:

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

752

753

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

1.

11.

111. Payload version

1.

11.

111. Decode payload in The Things Network

767

768

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

769

770

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]]

771

772

773

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.

下面的解码生成超链接放进去.

function Decoder(bytes, port) {

if(port==5)

{

var freq_band;

var sub_band;

var sensor;

if(bytes[0]==0x17)

sensor= "SDI12-LB";

var firm_ver= (bytes[1]&0x0f)+'.'+(bytes[2]>>4&0x0f)+'.'+(bytes[2]&0x0f);

if(bytes[3]==0x01)

freq_band="EU868";

else if(bytes[3]==0x02)

freq_band="US915";

else if(bytes[3]==0x03)

freq_band="IN865";

else if(bytes[3]==0x04)

freq_band="AU915";

else if(bytes[3]==0x05)

freq_band="KZ865";

else if(bytes[3]==0x06)

freq_band="RU864";

else if(bytes[3]==0x07)

freq_band="AS923";

else if(bytes[3]==0x08)

freq_band="AS923_1";

else if(bytes[3]==0x09)

freq_band="AS923_2";

else if(bytes[3]==0x0A)

freq_band="AS923_3";

else if(bytes[3]==0x0F)

freq_band="AS923_4";

else if(bytes[3]==0x0B)

freq_band="CN470";

else if(bytes[3]==0x0C)

freq_band="EU433";

else if(bytes[3]==0x0D)

freq_band="KR920";

else if(bytes[3]==0x0E)

freq_band="MA869";

if(bytes[4]==0xff)

sub_band="NULL";

else

sub_band=bytes[4];

var bat= (bytes[5]<<8 | bytes[6])/1000;

return {

SENSOR_MODEL:sensor,

FIRMWARE_VERSION:firm_ver,

877

878

FREQUENCY_BAND:freq_band,

SUB_BAND:sub_band,

BAT:bat,

}

}

else if(port==100)

{

var datas_sum={};

for(var j=0;j<bytes.length;j++)

{

var datas= String.fromCharCode(bytes[j]);

if(j=='0')

datas_sum.datas_sum=datas;

else

datas_sum.datas_sum+=datas;

}

return datas_sum;

}

else

{

var decode={};

decode.EXTI_Trigger= (bytes[0] & 0x80)? "TRUE":"FALSE";

922

923

decode.BatV= ((bytes[0]<<8 | bytes[1])&0x7FFF)/1000;

924

925

decode.Payver= bytes[2];

926

927

for(var i=3;i<bytes.length;i++)

{

var data= String.fromCharCode(bytes[i]);

if(i=='3')

decode.data_sum=data;

else

decode.data_sum+=data;

}

return decode;

}

}

1.

11. Uplink Interval

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:

955

956

[[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands#Change_Uplink_Interval>>url:http://wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands#Change_Uplink_Interval]]

1.

11. Frequency Plans

The SDI12-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.

964

965

966

[[https:~~/~~/wiki.dragino.com/index.php?title=End_Device_Frequency_Band>>url:https://wiki.dragino.com/index.php?title=End_Device_Frequency_Band]]

1.

11. Firmware Change Log

972

973

**Firmware download link:**

974

975

[[https:~~/~~/www.dropbox.com/sh/gf1glloczbzz19h/AABbuYI4WY6VdAmpXo6o1V2Ka?dl=0>>url:https://www.dropbox.com/sh/gf1glloczbzz19h/AABbuYI4WY6VdAmpXo6o1V2Ka?dl=0]]

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

980

981

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

982

983

* AT Command Connection: See [[FAQ>>path:#AT_COMMAND]].

984

* LoRaWAN Downlink instruction for different platforms:

985

986

[[http:~~/~~/wiki.dragino.com/index.php?title=Main_Page#Use_Note_for_Server>>url:http://wiki.dragino.com/index.php?title=Main_Page#Use_Note_for_Server]]

987

988

989

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

990

991

* **General Commands**.

992

993

These commands are to configure:

994

995

* General system settings like: uplink interval.

996

* LoRaWAN protocol & radio related command.

997

998

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

999

1000

[[http:~~/~~/wiki.dragino.com/index.php?title=End_Device_Downlink_Command>>url:http://wiki.dragino.com/index.php?title=End_Device_Downlink_Command]]

1001

1002

1003

* **Commands special design for SDI-12-LB**

1004

1005

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

1.

11. Set Transmit Interval Time

1011

1012

Feature: Change LoRaWAN End Node Transmit Interval.

1013

1014

**AT Command: AT+TDC**

1015

1016

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

1017

|AT+TDC=?|Show current transmit Interval|(((

30000

OK

the interval is 30000ms = 30s

1023

)))

1024

|AT+TDC=60000|Set Transmit Interval|(((

1025

OK

1026

1027

Set transmit interval to 60000ms = 60 seconds

1028

)))

1029

1030

**Downlink Command: 0x01**

1031

1032

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

1033

1034

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

1035

1036

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

1037

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

1038

1039

1.

1040

11. Set Interrupt Mode

1041

1042

Feature, Set Interrupt mode for GPIO_EXIT.

1043

1044

**AT Command: AT+INTMOD**

1045

1046

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

1047

|AT+INTMOD=?|Show current interrupt mode|(((

0

OK

the mode is 0 = No interruption

1053

)))

1054

|AT+INTMOD=2|(((

1055

Set Transmit Interval

1056

1057

1. (Disable Interrupt),

1058

1. (Trigger by rising and falling edge),

1059

1. (Trigger by falling edge)

1060

1. (Trigger by rising edge)

1061

)))|OK

1062

1063

**Downlink Command: 0x06**

1064

1065

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

1066

1067

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

1068

1069

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

1070

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

1071

1072

1.

1073

11. Set the output time

1074

1075

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

1076

1077

**AT Command: AT+3V3T**

1078

1079

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

1080

|AT+3V3T=?|Show 3V3 open time.|(((

0

OK

)))

|AT+3V3T=0|Normally open 3V3 power supply.|(((

OK

default setting

)))

|AT+3V3T=1000|Close after a delay of 1000 milliseconds.|(((

OK

)))

|AT+3V3T=65535|Normally closed 3V3 power supply.|(((

OK

)))

**AT Command: AT+5VT**

1102

1103

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

1104

|AT+5VT=?|Show 5V open time.|(((

0

OK

)))

|AT+5VT=0|Normally closed 5V power supply.|(((

OK

default setting

)))

|AT+5VT=1000|Close after a delay of 1000 milliseconds.|(((

OK

)))

|AT+5VT=65535|Normally open 5V power supply.|(((

OK

)))

**AT Command: AT+12VT**

1126

1127

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

1128

|AT+12VT=?|Show 12V open time.|(((

0

OK

)))

|AT+12VT=0|Normally closed 12V power supply.|OK

1134

|AT+12VT=500|Close after a delay of 500 milliseconds.|(((

OK

)))

**Downlink Command: 0x07**

1141

1142

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

1143

1144

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

1145

1146

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

1147

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

1148

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

1149

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

1150

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

1151

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

1152

1153

1.

1154

11. Set the all data mode

1155

1156

Feature, Set the all data mode.

1157

1158

**AT Command: AT+ALLDATAMOD**

1159

1160

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

1161

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

0

OK

)))

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

1168

1169

**Downlink Command: 0xAB**

1170

1171

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

1172

1173

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

1174

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

1175

1176

1.

1177

11. Set the splicing payload for uplink

1178

1179

Feature, splicing payload for uplink.

1180

1181

**AT Command: AT+DATAUP**

1182

1183

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

1184

|AT+DATAUP =?|Show current splicing payload for uplink mode|(((

0

OK

)))

|AT+DATAUP =0|(((

Set splicing payload for uplink mode is 0.

)))|(((

OK

)))

|AT+DATAUP =1|Set splicing payload for uplink mode is 1 , and the each splice uplink is sent sequentially.|OK

1200

|AT+DATAUP =1,20000|(((

1201

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

)))|OK

**Downlink Command: 0xAD**

1207

1208

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

1209

1210

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

1211

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

1212

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

1213

1214

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

1.

11. Set the payload version

1219

1220

Feature, Set the payload version.

1221

1222

**AT Command: AT+PAYVER**

1223

1224

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

1225

|AT+PAYVER=?|Show current payload version|(((

1

OK

)))

|AT+PAYVER=5|Set payload version is 5.|OK

1232

1233

**Downlink Command: 0xAE**

1234

1235

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

1236

1237

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

1238

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

1239

1240

1. Battery & how to replace

1241

11. Battery Type

1242

1243

SDI-12-LB is equipped with a [[8500mAH ER26500 Li-SOCI2 battery>>url:https://www.dragino.com/downloads/index.php?dir=datasheet/Battery/ER26500/]]. 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.

1244

1245

1246

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

1247

1248

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]]

1249

1250

1251

Minimum Working Voltage for the SDI-12-LB:

1252

1253

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

1.

11. Replace Battery

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

1260

1261

And make sure the positive and negative pins match.

1.

11. Power Consumption Analyze

1267

1268

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.

1269

1270

1271

Instruction to use as below:

1272

1273

1274

Step 1: Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from:

1275

1276

[[https:~~/~~/www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/>>url:https://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/Battery_Analyze/]]

1277

1278

1279

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.

1286

1287

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image037.png]]

1288

1289

1290

The battery related documents as below:

1291

1292

* [[Battery Dimension>>url:http://www.dragino.com/downloads/index.php?dir=datasheet/Battery/&file=LSN50-Battery-Dimension.pdf]],

1293

* [[Lithium-Thionyl Chloride Battery>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/ER18505_datasheet-EN.pdf]] datasheet, [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/ER18505_datasheet_PM-ER18505-S-02-LF_EN.pdf]]

1294

* [[Lithium-ion Battery-Capacitor datasheet>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC_1520_datasheet.jpg]], [[Tech Spec>>url:http://www.dragino.com/downloads/downloads/datasheet/Battery/SPC1520%20Technical%20Specification20171123.pdf]]

|(((

JST-XH-2P connector

)))

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]

1.

11.

111. Battery Note

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.

1.

11.

111. Replace the battery

1314

1315

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.

1316

1317

1318

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)

1. Remote Configure device

1326

11. Connect via BLE

1327

1328

Please see this instruction for how to configure via BLE:

1329

1330

[[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/]]

1.

11. AT Command Set

1. OTA firmware update

1337

1338

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

1339

1340

[[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/]]

1. Order Info

**Package Includes**:

1355

1356

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

1357

1358

**Dimension and weight**:

* Device Size: cm

* Device Weight: g

* Package Size / pcs : cm

* Weight / pcs : g

1. 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.

1370

* 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

1371

1372

[[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]]

1373

1374

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

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