Build mobile pH reader with display
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Terkwood commented
Design
We can use stuff that's lying around:
- ESP8266 microcontroller
- LCD
- A button for power on / off
- pH meter
- 5k mAh battery
Someone has already volunteered to make an enclosure
Functionality
- Display current pH reading on the LCD.
- Send readings to a local MQTT?/HTTP? endpoint using Wi-Fi