We have as parts:

  • Adafruit HUZZAH with ESP8266 as MC
  • HX711 breakout as load cell amplifier and ADC
  • two resistors (2x 4.7 kΩ) for the sensors (DHTxx and DS18B20)
  • two resistors (1 MΩ, 220 kΩ) as voltage divider to measure the battery drain * [an additional capacitor in parallel to the lower resistor is recommended but not prepared on the PCB yet]
  • screw terminals
  • for the PCB we need also a CN3065 breakout, this is the solar charging IC (not provided in the bread board version)
  • custom PCB