- Read sensors and voltage.
- Transmit all data via RFM69 radio and sleep for 1min.
ATmega328 with RFM69W 915Mhz radio and SPI flash (Miniwireless or Moteino)
SI7021 Temperature & Humidity sensor
BMP180 Temperature & Pressure sensor (Optional)
Voltage divider to read battery voltage
https://github.com/LowPowerLab/RFM69
https://github.com/LowPowerLab/SPIFlash
https://github.com/LowPowerLab/LowPower
https://github.com/LowPowerLab/SI7021
https://github.com/adafruit/Adafruit-BMP085-Library