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This is a node to fit in James' 3D printed gutter enclosure. An Atmel ATMEGA328P means it is Arduino compatible.

It has a CN3083 solar/LiPo charger on board. It also has a footprint for a HTU21D temperature/humidity sensor.

There are connections broken out for a DHT22 temperature/humidity sensor, and serial TX/RX.

Test pads:

  1. Test pad 1 is “OK” - pulled high at charge termination
  2. Test pad 2 is “CH” - pulled high during charging

Error states are other combinations of the TP outputs, you should check the datasheet for details.

Parts list:

  • U3 MCP1700 SOT-23 3.3V regulator
  • U4 CN3083 charger
  • C1, C2 1uF
  • R3, R4, R5, R6, R7, R8 100k
  • C7 22uF
  • R2 3.6k
  • C6 4.7uF
  • C3, C4, C5 100nF
  • R1 4.7k
  • R9 (not fitted)

jon/gutternode1.txt · Last modified: 2020/06/27 23:02 (external edit)