Resources:
Wireless Load Cell Amplifier Board With ESP32 Connectivity For IoT Weighing Systems And Smart Scale Applications
The SparkFun OpenScale IoT ESP32 PICO MINI board is a complete wireless solution for building high accuracy weighing systems using standard load cells. Designed for simplicity and flexibility, it allows users to convert single or multiple load cells into a fully functional digital scale with minimal setup. With support for 4 wire and 5 wire load cells including Wheatstone bridge configurations, it is well suited for applications such as industrial measurement, smart agriculture, inventory monitoring, and precision weighing.
Powered by the ESP32 PICO MINI module, the board offers 2.4GHz WiFi and Bluetooth connectivity for real time data access and remote configuration. Users can easily calibrate and control the system via a serial terminal over USB C or Bluetooth connection. The integrated Qwiic interface enables expansion with additional sensors and displays, while OTA firmware updates ensure long term usability in connected IoT environments.
Key Features
- ESP32 PICO MINI Module: Integrated microcontroller with wireless connectivity and processing
- Wireless Connectivity: Supports 2.4GHz WiFi Bluetooth and Bluetooth LE
- Load Cell Compatibility: Works with 4 wire and 5 wire load cells including Wheatstone bridge setups
- Easy Configuration: Terminal based setup via USB C or Bluetooth at 115200bps
- OTA Updates: Firmware updates over WiFi for remote maintenance
- Adjustable Data Rate: Selectable 10SPS or 80SPS output for different precision needs
- Temperature Sensing: Supports onboard and external temperature sensors
- Qwiic Expansion: Add I2C sensors and displays without soldering
- Flexible Gain Settings: Fixed and adjustable gain for accurate signal measurement
- Low Power Operation: Efficient current consumption suitable for IoT deployments
