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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|(% 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"]]

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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)

**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]]

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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.

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

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|(% style="width:170px" %)**AT+DATACUT1 value**|(% style="width:338px" %)**Final Result to combine Payload**

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|(% style="width:170px" %)34,1,1+2+3|(% style="width:338px" %)0D 00 01 30 31 33

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|(% style="width:170px" %)34,2,1~~8+12~~16|(% style="width:338px" %)0D 00 01 30 31 33 4D 45 54 45 52 54 45 52 31 32

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|(% style="width:170px" %)34,2,1~~34|(% style="width:338px" %)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:**

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

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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: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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**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:1675215782925-448.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:1675215828102-844.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:1675215848113-696.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.**

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== 2.4 Uplink Payload ==

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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.

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=== 2.4.1 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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(% border="1" cellspacing="4" style="background-color:#f7faff; width:437px" %)

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

Example parse in TTNv3

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[[image:1675215946738-635.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

=== 2.4.2 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

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

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|(% style="width:93px" %)(((

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**Size(bytes)**

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)))|(% style="width:83px" %)**2**|(% style="width:70px" %)**1**|(% style="width:234px" %)**Length depends on the return from the commands**

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

Battery(mV)

&

Interrupt_Flag

)))|(% style="width:70px" %)[[PAYLOAD_VER>>path:#Probe_Model]]|(% style="width:234px" %)(((

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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:1675216282284-923.png]]

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=== 2.4.3 Battery Info ===

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Check the battery voltage for SDI-12-LB.

Ex1: 0x0B45 = 2885mV

Ex2: 0x0B49 = 2889mV

=== 2.4.4 Interrupt Pin ===

724

725

726

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.

731

732

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

733

734

735

=== 2.4.5 Payload version ===

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

740

741

742

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

743

744

[[image:1675216779406-595.png]]

745

746

747

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.

748

749

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

750

751

752

== 2.5 Uplink Interval ==

753

754

755

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:

756

757

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

== 2.6 Frequency Plans ==

763

764

765

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.

766

767

[[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/]]

== 2.7 Firmware Change Log ==

772

773

774

**Firmware download link:**

775

776

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

777

778

779

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

780

781

782

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

783

784

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

785

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

786

787

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

788

789

* **General Commands**.

790

791

These commands are to configure:

792

793

* General system settings like: uplink interval.

794

* LoRaWAN protocol & radio related command.

795

796

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

797

798

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

799

800

801

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

802

803

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

804

805

806

== 3.1 Set Transmit Interval Time ==

807

808

809

Feature: Change LoRaWAN End Node Transmit Interval.

810

811

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

812

813

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

814

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

815

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

816

30000

817

OK

818

the interval is 30000ms = 30s

819

)))

820

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

821

OK

822

Set transmit interval to 60000ms = 60 seconds

823

)))

824

825

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

826

827

828

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

829

830

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

831

832

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

833

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

834

835

== 3.2 Set Interrupt Mode ==

836

837

Feature, Set Interrupt mode for GPIO_EXIT.

838

839

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

840

841

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

842

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

843

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

844

0

845

OK

846

the mode is 0 = No interruption

847

)))

848

|AT+INTMOD=2|(((

849

Set Transmit Interval

850

~1. (Disable Interrupt),

851

2. (Trigger by rising and falling edge)

852

3. (Trigger by falling edge)

853

4. (Trigger by rising edge)

854

)))|OK

855

856

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

857

858

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

859

860

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

861

862

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

863

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

864

865

== 3.3 Set the output time ==

866

867

868

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

869

870

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

871

872

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

873

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

874

|(% 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" %)(((

883

OK

884

)))

885

|(% 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**

890

891

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

892

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

893

|(% 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" %)(((

902

OK

903

)))

904

|(% 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**

909

910

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

911

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

912

|(% 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

917

|(% 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**

922

923

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

924

925

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

926

927

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

928

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

929

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

930

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

931

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

932

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

933

934

== 3.4 Set the all data mode ==

935

936

937

Feature, Set the all data mode.

938

939

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

940

941

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

942

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

943

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

0

OK

)))

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

948

949

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

950

951

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

952

953

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

954

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

955

956

== 3.5 Set the splicing payload for uplink ==

957

958

959

Feature, splicing payload for uplink.

960

961

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

962

963

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

964

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

965

|(% 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" %)(((

970

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

975

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

976

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

977

)))|OK

978

979

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

980

981

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

982

983

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

984

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

985

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

986

987

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

988

989

990

== 3.6 Set the payload version ==

991

992

Feature, Set the payload version.

993

994

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

995

996

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

997

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

1

OK

)))

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

1002

1003

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

1004

1005

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

1006

1007

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

1008

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

1009

1010

= 4. Battery & how to replace =

1011

1012

== 4.1 Battery Type ==

1013

1014

1015

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.

1016

1017

1018

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

1019

1020

[[image:1675146710956-626.png]]

1021

1022

1023

Minimum Working Voltage for the SDI-12-LB:

1024

1025

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

1026

1027

1028

== 4.2 Replace Battery ==

1029

1030

1031

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

1032

1033

And make sure the positive and negative pins match.

1034

1035

1036

== 4.3 Power Consumption Analyze ==

1037

1038

1039

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.

1040

1041

Instruction to use as below:

1042

1043

(% 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]]

1044

1045

(% 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.

1052

1053

[[image:1675146895108-304.png]]

1054

1055

1056

The battery related documents as below:

1057

1058

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

1059

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

1060

* [[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]]

1061

1062

[[image:image-20230131145708-3.png]]

1063

1064

1065

=== 4.3.1 Battery Note ===

1066

1067

1068

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.

1069

1070

1071

=== 4.3.2 Replace the battery ===

1072

1073

1074

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.

1075

1076

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)

= 5. Remote Configure device =

1081

1082

== 5.1 Connect via BLE ==

1083

1084

1085

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/]]

1086

1087

1088

== 5.2 AT Command Set ==

= 6. OTA firmware update =

1093

1094

1095

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

1096

1097

[[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. Order Info =

Part Number: SDI-12-LB-XXX

1105

XXX: The default frequency band

1106

1107

AS923: LoRaWAN AS923 band

1108

AU915: LoRaWAN AU915 band

1109

EU433: LoRaWAN EU433 band

1110

EU868: LoRaWAN EU868 band

1111

KR920: LoRaWAN KR920 band

1112

US915: LoRaWAN US915 band

1113

IN865: LoRaWAN IN865 band

1114

CN470: LoRaWAN CN470 band

= 8. Packing Info =

**Package Includes**:

1126

1127

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

1128

1129

**Dimension and weight**:

* Device Size: cm

* Device Weight: g

* Package Size / pcs : cm

* Weight / pcs : g

= 9. 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.

1140

1141

* 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]]

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

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