SparkFun OpenScale-IoT Binaries

Latest Firmware Release

v1.0 - Original release

Product Description

The SparkFun OpenScale-IoT is a configureable device for reading and configuring load cells. Please consider supporting SparkFun by buying a product or kit:

• SparkFun OpenScale-IoT

The OpenScale-IoT is a highly configurable scale for any weight related project. It utilizes an ESP32 for connection over Bluetooth SPP and/or BLE, and/or TCP, and/or over two UART ports for polling or triggered scale and temperature measurements. It relies on the HX711 load cell amplifier for weight measurements which can be attached to a single load cell or a combination of individual strain gauges.

Binaries Description

Included in this repository are two binaries:

1. "OpenScale-IoT.ino.bin"
2. "OpenScale-IoT.ino.merged.bin"

The first binary includes the firmware for the SparkFun OpenScale-IoT. The second binary includes the memory partitions in addition to the firmware. Use the second "merged" binary when the memory partitions are set to anything but a default 8MB partition scheme. If you've never touched the partition scheme, then use the second binary.

How to Upload

Uploading raw binaries to an ESP32 requires either the Arduino's arduino-cli tool or Espressif's esptool. First download the repository and navigate to the folder where they are downloaded.

Using arduino-cli

In the background the arduino-cli is utilizing esptool. Ensure that you have version 3.2 of the ESP32 core file. To roll back your version or install version 3.2 simply run the command:

arduino-cli core install esp32:esp32@3.2

Now upload the binary, making sure to modify >YOUR_PORT< with your COM port. On Linux this may be something like /dev/ttyUSB0 on Windows COM3.

arduino-cli upload -i OpenScale-IoT.ino.bin -p >YOUR_PORT< -b esp32:esp32:esp32

Using esptool directly.

Navigate to the location where esptool.py lives and run the following command. Make sure to update >YOUR_PORT< with your COM port. On Linux this may be something like /dev/ttyUSB0 on Windows COM3.

python -m esptool.py --chip esp32 -p >YOUR_PORT< -b 921600 write_flash 0x0 />PATH_TO_BINARY</OpenScale-IoT.ino.merged.bin

License Information

This product is open source! Please see the LICENSE.md for more details.

Please use, reuse, and modify these files as you see fit. Please maintain attribution to SparkFun Electronics and release anything derivative under the same license.

Distributed as-is; no warranty is given.

• Your friends at SparkFun.