Cactus

🌵 An 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
  5. Monitoring LiPo battery voltage with Wemos D1 minibattery shield and Thingspeak

Programming

  1. ESP8266 pogo jig programming

Design tools

  1. Creating an FPGA Power Tree
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Low power

  1. ESP8266 Low Power Solutions
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