Lorawan - The Things Network - Dragino sensor PS-LB

[kropfm]

Create a resident script with non-zero sleep time. Modify username, password and topicname variables as needed. Change group addresses in the ON_MESSAGE callback.

Code:

broker = 'eu1.cloud.thethings.network'
port = 8883
username = 'PUT_USER_HERE@ttn'
password = 'PUT_API_KEY_HERE'
topicname = 'v3/sensor-well-level@ttn/devices/eui-xxxxxxxxxxxxxxxx/up'

require('json')
mqtt = require('mosquitto')
client = mqtt.new()

client.ON_CONNECT = function(status, rc, msg)
  if status then
    log('mqtt connected')
    client:subscribe(topicname)
  else
    log('mqtt connect failed ' .. tostring(msg))
    client:disconnect()
  end
end

client.ON_MESSAGE = function(mid, topic, payload)
  local data = json.pdecode(payload)

  if type(data) ~= 'table' then
    return
  end

  local datetime = data.received_at
  local sensor = data.uplink_message.decoded_payload

  grp.checkwrite('1/1/1', datetime)

  grp.checkwrite('1/1/2', sensor.Bat_V)
  grp.checkwrite('1/1/3', sensor.IDC_intput_mA)
  grp.checkwrite('1/1/4', sensor.Water_deep_cm)
end

client.ON_ERROR = log

client:login_set(username, password)
client:tls_insecure_set(true)
status, rc, msg = client:connect(broker, port)

if status then
  client:loop_forever()
else
  log('connect failed: ' .. tostring(msg))
end

Hello there

Apology, for my ignorance. I'm trying to get a temperature value from a LoRaWan sensor. I use this script, as I also use the the things network, and while I seem to connect to MQTT, I never get any values. I run this resident script with a 60 seconds delay. I use a virtual variable. Now, there I wasn't sure either. Is the result a text or 2 byte value?

I see no errors but also no values.

Your help is much appreciated.

Martin