ESP32 Reflow Controller

You can read more about my project here at Hackaday.io . 🙂

This repository contain firmware and 3D files for ESP32 reflow controller.

All version of controller include:

• ESP32 module
• 2.8" TFT LCD (ILI9341)
• MAX31856 IC for measuring temperature
• SD card slot
• buzzer
• USB to UART converter
• USB connector
• 5 buttons (Left, Right, Up, Down, Select)
• status LED

There are these revision of the board:

• rev. A

First version of the board. Fully working, except buzzer.

• rev. B

Second version of the board. Reworked buzzer and changed for SMD version.

• rev. C

This board include 2 more buttons (Menu & Back button), fan connector, Reset button and USB-C connector.

Board dimensions are 105 x 51 mm.

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There are 2 version of firmware for this board:

• V1

Basic functionality. One working profile which can be start/stoped. Not developed anymore.

• V2 (recommended)

You will need these libraries to compile FW from source code:

• Adafruit_ILI9341 (v. 1.5.1 in Library Manager)
• Adafruit_MAX31856 (v. 1.0.3 in Library Manager)
• Adafruit_GFX (v. 1.7.2 in Library Manager)
• ArduinoJson (v. 6.13.0 in Library Manager)
• PID (v. 1.2.0 in Library Manager)
• WiFiManager (https://github.com/tzapu/WiFiManager/tree/development)- install it in IDE from ZIP file

This firmware include following:

• OTA update.
• Vertical/Horizontal mode.
• WiFiManager - you can setup your WiFi network for OTA updates. When not setup, it will start in AP mode and create network with SSID ReflowOvenAP. Setup server can be access at IP address: 192.168.4.1, after connecting to this AP.

Planned features:

• Reflow profiles (via JSON file)
• Web server for remote change of the settings

This firmware include Menu, which can be open by pressing Menu button (Left button on rev. A&B). Here you can change items in Settings. This firmware still contain one hardcoded profile.

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You can find STL files and Fusion 360 files for Front cover and for separate case (HW folder).

If you want to look at Front cover in 3D (web browser) you can use this link: https://a360.co/2S8YHzj

Front panel asssembly (rev A&B): https://a360.co/2S37lPS

Firmware is based on Rocket Scream Electronics firmware for Reflow Oven Shield

Some parts of the V2 firmware are inspired by parts of Reflow Master firmware by @UnexpectedMaker

In case that you will have any question, you can contact me at info@czechmaker.com