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WiFi and MQTT enabled scale. Features ability to get OTA updates.

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scale

Wifi enabled scale that uploads the user's weight to a server of their choice.

Project page: https://articles.maximemoreillon.com/articles/160

Note to people intending to make their own: Choose the pins for the display carefully. Some libraries require specific pins to be used.

Video:

Alt text

Requirements

Calibration

Calibration is done using the MAPPING_RAW_LOW, MAPPING_RAW_HIGH, MAPPING_HG_LOW and MAPPING_HG_HIGH defines in scale_config.h such that:

  • MAPPING_RAW_LOW is the raw reading of the HX711 when MAPPING_HG_LOW hectograms are on the scale.
  • MAPPING_RAW_HIGH is the raw reading of the HX711 when MAPPING_HG_HIGH hectograms are on the scale.

Hardware

Parts list

  • Wemos D1 Mini
  • HX711 load cell amplifier
  • SSD1306 OLED display

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WiFi and MQTT enabled scale. Features ability to get OTA updates.

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