Xavier wrote: Could you share your design before you order the PCB?
Did you think of a cheap fitting enclosure and battery holder?
Do you have a target for price/unit?
Xavier wrote: As I understand it means you plug a pro mini on one side and on the other side the headers for RF24, sensors and power.
Xavier wrote: Any news? Maybe a picture of the prototype?
Due to power consumption I don't think a single ESP8266 solution could be a challenger. Can it?