RS485 NH3 (Ammonia) sensor + S2100 Data Logger

AndyCA · January 26, 2023, 1:30pm

Who has experience setting up these two? Purchased S2100 & NH3(Ammonia) for one application but having hard time setting up data logger to read info from the sensor. Also tried to connect NH3 sensor to my PC via USB to RS485 converter, no luck. Simply no readings. Read RS485 NH3 Data sheet many times. Still couldn’t make it work. Please HELP!!!

Lee · January 28, 2023, 2:00am

Hello~ thanks for asking, this is Lee from Sensecap team. Could you please show some screenshots of your configuration pages?like this:

AndyCA · February 5, 2023, 4:22am

Selecting Modbus Address as 15 fixed connectivity problem. Thank you.

AndyCA · February 5, 2023, 4:23am

I am planning to use S2100 on Helium network and ThingsBoard as an integration. Where can I find a proper payload decoder?

AndyCA · February 16, 2023, 4:10am

Thank you. But unfortunately this decoder does not represent readings from NH3 sensor correctly since this decoder is for weather station.

Lee · February 16, 2023, 5:25am

Sorry for my mistake! Please use this
S2100 Data Logger
TTN:

github.com

Seeed-Solution/TTN-Payload-Decoder/blob/master/SenseCAP_LoRaWAN_V2_Decoder_For_TTN.js

/**
 * Entry, decoder.js
 */
function decodeUplink (input, port) {
  // data split

  var bytes = input['bytes']
  // init
  bytes = bytes2HexString(bytes)
    .toLocaleUpperCase()

  let result = {
    'err': 0, 'payload': bytes, 'valid': true, messages: []
  }
  let splitArray = dataSplit(bytes)
  // data decoder
  let decoderArray = []
  for (let i = 0; i < splitArray.length; i++) {
    let item = splitArray[i]
    let dataId = item.dataId

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Helium Decoder:

github.com

Seeed-Solution/TTN-Payload-Decoder/blob/master/SenseCAP_LoRaWAN_V2_Decoder_For_Helium.js

/**
 * Entry, decoder.js
 */
function Decoder (bytes, port) {
  // data split

  bytes = bytes2HexString(bytes)
    .toLocaleUpperCase()

  let result = {
    'err': 0, 'payload': bytes, 'valid': true, messages: []
  }
  let splitArray = dataSplit(bytes)
  // data decoder
  let decoderArray = []
  for (let i = 0; i < splitArray.length; i++) {
    let item = splitArray[i]
    let dataId = item.dataId
    let dataValue = item.dataValue
    let messages = dataIdAndDataValueJudge(dataId, dataValue)

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AndyCA · February 17, 2023, 1:16am

This is how Payload Output looks:
{
“data”: {
“err”: 0,
“payload”: “333402003256B8000186A0”,
“valid”: true,
“messages”: [
[
{
“measurementValue”: 3299,
“measurementId”: 3,
“type”: “Measurement”
},
{
“measurementValue”: 100,
“measurementId”: 4,
“type”: “Measurement”
}
]
]
}
}

AndyCA · February 17, 2023, 1:16am

This is how my other payload output for Dragino LHT65 looks like
{
“BatV”: 3.038,
“Bat_status”: 3,
“TempC_SHT”: 22.77,
“Hum_SHT”: 40.2,
“Ext_sensor”: “Temperature Sensor”,
“TempC_DS”: 22.43
}

AndyCA · March 5, 2023, 5:53pm

I am sorry but the payload decoder you provided doesn’t work correctly with S2100 Data Logger and NH3 Ammonia sensor. This decoder was made specifically to weather station.

Lee · March 6, 2023, 3:32am

Hello sir,

May I know which platform you used?

AndyCA · March 6, 2023, 4:26am

Helium network and TagoIO Integration

AndyCA · March 6, 2023, 5:04am

Also I am wondering why uplink packets are different? I am using 3 measurements (Ammonia, Temperature & Humidity) . Sometimes Data Logger sends one packet which consist of all 3 measurements and battery packet. Sometimes only measurements 1&2, sometimes only measurement 3. It’s inconsistent.

Lee · March 7, 2023, 12:15pm

To further investigate the issue, could you please provide us with a screenshot of how you have configured the S2100? It would be helpful to have both the sensor and measurement settings. For your reference, you can check the configuration we made previously.

Additionally, the decoder file is correct as we test it before. what’s your expected output?

Finally, I will confirm with our R&D team about the issue of packet initialization and get back to you as soon as possible with further information.

BTW, would it be possible for us to communicate on Discord? My ID is Lee_SenseCAP#7369. What’s the best way to reach you? This would make it easier for us to communicate in real-time.

Thank you again for your cooperation. Please let us know if you have any further questions or concerns.