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ESP32-S3 Mini + WiFi + HX711 ​

This configuration is the simple WiFi build for creating a Bee Thing scale around an ESP32-S3 Mini board and an HX711 amplifier.

ESP32-S3 Mini board

Image source: ESPBoards.

Who Is It For? ​

Choose this configuration if you want a compact, inexpensive, easy-to-understand build, with WiFi available when measurements are sent.

It is well suited to prototypes, workshop use, or an apiary covered by WiFi. It is less integrated than a field-oriented board: power, battery, charging, and physical protection remain specific to your build.

What the Board Provides ​

The super_mini_esp32_s3_wifi_hx711 firmware preset expects:

  • an ESP32-S3 with WiFi;
  • native USB-C serial;
  • the BOOT button as the configuration button;
  • a WS2812 RGB LED on GPIO48 for firmware status.

What You Need to Add ​

  • a weighing module for the expected weight range, made of a load cell and an HX711;
  • field-ready power;
  • enclosure, humidity protection, and a stable mechanical build.

Wiring ​

The firmware uses the default HX711 wiring:

HX711 signalESP32-S3 Mini pin
DT / DOUTGPIO4
SCK / CLKGPIO5

The exact load-cell wiring depends on your load cell and HX711 module. See the shared reference: HX711 wiring.

Firmware ​

Build and upload the PlatformIO environment:

bash
pio run -e super_mini_esp32_s3_wifi_hx711 -t upload

This configuration uses:

  • the Hx711Sensor sensor;
  • the WifiHttpTransport transport;
  • the super_mini_esp32_s3_wifi_hx711 hardware profile.

Runtime Configuration ​

After flashing, provision the board with the WiFi portal or with bee-config over the serial port:

  • WiFi SSID and password;
  • Bee Thing ingestion URL;
  • scale token;
  • HX711 calibration factor;
  • tare;
  • sleep interval.

To open the WiFi portal, put the board in configuration mode, hold BOOT for about 2 seconds, connect to the BeeThing-Config network, then open http://192.168.4.1/.

See: Firmware configuration and Calibration.

Known Limits ​

This page does not yet document a complete mechanical build or field enclosure. Without an integrated charging board, you must test power and protection for your own build.