ESP8266 + bme280 battery life: 120 days and counting

The sensor

I have an outside battery powered temperature/humidity/pressure sensor, here is the list of what it is based on:

  • ESP8266 (esp12f), according to espressif
    • from 120 to 170mAh for Tx
    • 10µAh in deep sleep mode
  • bme280
    • 3.6µAh at 1Hz when measuring the 3 parameters
  • MCP1700-3302E LDO …
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