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Weight Scale Data Logger

Some ugly C code to capture different measures (like: timestamp, input voltage, iteration, scale reading, ...), store up to a few kB of them in ESP8266 memory, and then flush periodically to an SD card.

The data collector consists of:

  • microcontroller - ESP8266 - had lying it around & needed internet based timestamp for post processing
  • ADS1115 - 4channel, 16bit ADC to read reference voltages
  • BME280 - I2C/SPI temperature, humidity, pressure sensor
  • SD card - to store captured data
  • [optionally] small fan to distribute heat evenly in the environment
  • [optionally] designated reference voltage for cell sensor ADC
  • [variation of] different power supplies
  • [variation of] different ADC sensors (HX711, NAU7802)
  • shoe box with a lid, some wood, and a bunch of wires

For more details go to: Researching weight scales - hardware and firmware.

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