Cactus

🌵 Indoor WiFi-connected temperature and humidity sensor 🍶

power LiPO
wireless WiFi
sensor Humidity
mcu ESP8266
battery life 1 month
bom items 36
bom cost USD $26.92
vendors 5
completed May 2019

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ESP8266

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Sensor Si7021

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Shift register SN74HC595

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Coin cell

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Battery shield

  1. WeMos battery shield
  2. Power usage of WeMos and battery shield
  3. Battery shield docs and schematic
  4. WeMos lithium battery shield
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Programming

  1. ESP8266 pogo jig programming

Design tools

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Low power

  1. ESP8266 Low Power Solutions
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