Hi, trying to send 4 feeds (IPPubl,IPLocal, SCATemp,SCAHum) from a NodeMCU skecth + DHT11 sensor I wish to do it like Thingspeak in one MQTT publish message (see @barx post at https://www.b4x.com/android/forum/threads/mqtt-connect-to-thingspeak.89453/post-566218)
Adafruit has a facility named Group: you can add feeds to a Group and Publish/Subscribe to/a Group (you can test it on Windows 10 with mqtt fx http://www.jensd.de/apps/mqttfx/1.7.1/)
The syntax of the Publish message is:
username/groups/default/json (you can change default name or create another group
and the json payload:
{
"feeds": {
"SCAIPPubl": "88.0.16.194",
"SCAIPLocal": "192.168.1.4",
"SCATemp": "28",
"SCAHum": "38"
},
"location": {
"lat":41.80,
"lon": 2.5,
"ele": 500.0 }
}
With only one MQTT Publish, you can send several feeds (to a Group):
Adafruit IO DashBoard
Adafruit has a facility named Group: you can add feeds to a Group and Publish/Subscribe to/a Group (you can test it on Windows 10 with mqtt fx http://www.jensd.de/apps/mqttfx/1.7.1/)
The syntax of the Publish message is:
username/groups/default/json (you can change default name or create another group
and the json payload:
{
"feeds": {
"SCAIPPubl": "88.0.16.194",
"SCAIPLocal": "192.168.1.4",
"SCATemp": "28",
"SCAHum": "38"
},
"location": {
"lat":41.80,
"lon": 2.5,
"ele": 500.0 }
}
With only one MQTT Publish, you can send several feeds (to a Group):
B4R:
Dim bc As ByteConverter
Dim IPPubl As String="88.10.2.174" '"https://api.myip.com"
Dim IPLocal As String="192.168.1.165" 'Wifi.IPlocal
Dim Temp As String=GetTemp 'From DHT11
Dim Hum As String=GetHum 'From DHT11
Dim fullstring As String
fullstring=JoinStrings(Array As String _
("{""feeds"": {""SCAIPPubl"":""",IPPubl,""",""SCAIPLocal"":""",IPLocal,""",""SCATemp"":""",Temp,""",""SCAHum"":""",Hum,"""},""location"": {""lat"":41.80,""lon"":2.5,""ele"":500}}"))
mqtt.Publish("username/groups/default/json",bc.StringToBytes(fullstring))
Log(fullstring)Adafruit IO DashBoard
Last edited: