Open-source reflow controller for ovens and hot plates.

Front	Back

• MCU: STM32F411CEU6 (WeAct MiniF4 "Black Pill" module).
• Sensors: K-Type thermocouple to digital converter. Compatible with both MAX31855 and MAX6675.
• Display: 2" 240×320 IPS ST7789 (Waveshare 17344 module).
• Inputs: 3x Push buttons to navigate the menu.
• Outputs: 2x 5V 2A outputs capable of driving solid state relays as well as inductive loads (mechanical relays, fans).
• Buzzer: Alarm buzzer.
• Power: 5V provided via USB-C or screw terminals.

Feel free to build one yourself! The components are easy to source and assemble by hand.

• Gerbers
• Schematics
• Interactive BOM

• Edit configurable parameters in Configuration.h if needed.
• Edit the profiles in Profile.cpp if needed. You can also add extra profiles.

1. Install STM32CubeProgrammer and the Arduino IDE.
2. From the Boards Manager, install STM32 Cores 1.9.0 or later, following this tutorial.
3. Select Board: Generic STM32F4 series.
4. Select Board part number: BlackPill F411CE.
5. Select USB support: CDC (generic 'Serial' supersede U(S)ART).
6. Select Upload method: STM32CubeProgrammer (DFU).
7. From the Library Manager, install:
   • Adafruit BusIO 1.7.2
   • Adafruit GFX Library 1.10.4
   • Adafruit ST7735 and ST7789 Library 1.6.0
8. Reset the board in DFU mode: hold BOOT0, hold NRST, release NRST, release BOOT0. STM32 BOOTLOADER should appear in Windows Device Manager.
9. Press the Upload button in the Arduino IDE.