Collecting data from DHT22 and BMP180 per ESP-07(1mb), powered by li-ion battery on TP4056 controller. Max voltage 4.2v is decreased by diode.

Outside Temperature and Relative humidity in Brampton, Canada. DHT22 measures and solar powered ESP8266 uploads.

A prototype device using and ESP-07 and HTU21D sensor, running off 3x AA NiMH batteries