I choose the ESP8266 as the power meter strain gauges and amplifier are mounted on the crank-arm/pedal of the bike , as you cant use wires to do this it has to Transmitted by some form of RF.

If you’ve ever put your finger on an ESP8266 module when it’s really working, you’ll know what went wrong here: the ESP8266 heated up the board and gave a high reading on the temperature sensor.