jobitjoseph / reflow946

Bluetooth LE temperature controller for the 946C electronic hot plate

Reflow946

The Reflow946 is a Bluetooth LE temperature controller for the 946C electronic hot plate. Using this controller, a reflow profile can be programmed from your web browser using the Web Bluetooth API. You can use preset profiles (e.g. for lead-free or leaded soldering) or create a custom profile for a perfect cheese fondue. 🫕

The controller board is intended to replace the original controller board. It is only compatible with the 3 buttons variant pictured above (see this teardown). Please send a PR if you adapted the design to a new variant.

Hardware

The controller is based on a ESP32 module with an IPEX antenna. Since the metal case acts as a Faraday cage, the BLE signal can be improved by taping an antenna outside of the case.

Front

Back

Status

• Temperature control
  • Temperature control using the front panel
  • BLE GATT service for temperature control
• Reflow profile programming
  • BLE GATT service for reflow profiles
  • Web Bluetooth application

Credits

• Arnaud Durand - Orignal design
• Elías Rodríguez Martín - Revision 1.1, conversion to KiCad