we are in the process of researching the possibility of lorawan on the SCK2.1. Starting january 2020, we want to be able to sent the sensor data (from both the urban and gas board) to a lorawan server, albeit TTN.
How far have you reached in finding a way to circumvent the wifi transmission on the ESP8266, and to replace it with the Pycom lorawan board, as seen in your draft?
At this moment, the 4G with Mikrotik is not an option as we really want to use the LPWAN technology. Afterall, the payload data sent is not that high volume and neither frequent I guess, if the rate of transmission can be adjusted in the firmware (lora duty cycle to take into account).
We much appreciate any info.