¶ MQTT to LoraWan converter bridge
As an extension to the LoraWan, the “MQTT 2 Converter Bridge” can also be set up to ensure an even simpler connection to external applications
¶ up
Communication then takes place via MQTT clients, which can handle the entire communication via two interfaces alone.
This would be the [1] interface "up" through which all information coming from the LoraWan adapter is handled:
{
"deviceEUI":"294cf585f55fa497",
"received_UP":{
"humidity":82,
"temperature":11.52,
"batteryVoltage":3.676,
"pressure":1006.28,
"batteryLevel":0
}
}
Arriving here is the (unique) device address and the relevant user data.
¶ down
The MQTT input “down” offers the option of sending commands to the devices. Example:
{
"deviceEUI":"A84041162183F8FB",
"function":"RO1_target",
"value":true
}
The structure of the control command is deviceEUI, (configured) control command, value.
¶ down response
The value must be sent in the correct format (bool, number, string). When you send a “down” command, there is an “up” response. Example response if successful:
{
"deviceEUI":"A84041162183F8FB",
"respone_Down":{
"applicationId":"hafi-ttn-lorawan",
"deviceEUI":"A84041162183F8FB",
"deviceId":"eui-a84041162183f8fb",
"deviceType":"LT22222",
"downlink":"RO1_target",
"value":true,
"received":{
"deviceEUI":"A84041162183F8FB",
"downlink":"RO1_target",
"value":true
}
}
Example response in case of failure:
{
"deviceEUI":"A84041162183F8FB",
"respone_Down_ERROR":"downlink is type boolean, but received string",
"received":{
"deviceEUI":"A84041162183F8FB",
"downlink":"RO1_target",
"value":"false"
}
}
