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This reflow oven controller was built to control a modified toaster oven for the purpose of doing reflow soldering of printed circuit boards. The controller was designed and built around an ESP32-DevKitC development board with ancillary electronics added to complete the controller. The schematic can be found in <files/hardware>.
The code for the controller was modified extensively from existing Arduino sketches for reflow oven controllers and is PID-algorithm based. The firmware ("sketch") can be found in <Files/firmware>.
The Serial Profile Plotter For Reflow Ovens utility was written to operate in conjunction with this controller. You can download it here:
https://sourceforge.net/projects/serial-profile-plotter-reflow/
Features
- ESP32-DevKit-C Arduino based reflow oven controller
- I2C LCD display with support code for 4 line x 20 characters display
- USB-Serial board interface to PC using serial Rx/Tx data from/to ESP32
- MAX6675 thermocouple interface board with SPI connection to ESP32
- Single Start / Stop button for initializing / halting reflow process
- Button to select between lead-free and leaded solder profiles
- EN and BOOT buttons brought out from ESP32 for programming the device
- Output for driving Solid State Relay (SSR)
- Output for driving a small 8 ohm speaker which is used for audible warnings
- Startup sounds and alarm sounds for start of different phases of reflow process
- SPDT switch to select between stand-alone (oven) mode and ESP32 programming mode
- The Serial Profile Plotter For Reflow Ovens utility was written to operate in conjunction with this controller
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