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ULP SHT3x sensor application

This software captures temerature and humidity and send those value to Fluentd.

By using low power ULP, it can powered by AAA batteries.

Pin assign

  • GPIO25: SCL
  • GPIO33: SDA
  • GPIO14: TPS61291 Bypass (if battery voltage is high enough, output L)
  • GPIO32: Battery voltage monitor (A/D)