https://github.com/gabrielmarcano/pyroaster

Firmware to create a real life roaster using the ESP32 microcontroller and MicroPython
https://github.com/gabrielmarcano/pyroaster

esp32 microcontrollers micropython micropython-esp32

Last synced: 1 day ago
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Firmware to create a real life roaster using the ESP32 microcontroller and MicroPython

• Host: GitHub
• URL: https://github.com/gabrielmarcano/pyroaster
• Owner: gabrielmarcano
• Created: 2024-11-12T16:59:35.000Z (2 months ago)
• Default Branch: main
• Last Pushed: 2025-01-21T20:37:15.000Z (2 days ago)
• Last Synced: 2025-01-21T21:27:32.640Z (2 days ago)
• Topics: esp32, microcontrollers, micropython, micropython-esp32
• Language: Python
• Homepage:
• Size: 18.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
ESP32 Roaster Project



  A project to control a peanut, coffee & cocoa roaster with an ESP32





[![python](https://img.shields.io/badge/Python-3.13-3776AB.svg?style=flat&logo=python&logoColor=white)](https://www.python.org)

[![micropython](https://img.shields.io/badge/built%20for-MicroPython-3776AB?logo=micropython)](https://micropython.org/)



## Contents

- [Summary](#summary)

- [Project structure](#project-structure)

- [Hardware](#hardware)

- [Software](#software)

- [Wiring](#wiring)

## Summary

All logic depends on the data given by the **Thermocouple** & **DHT22** sensors, and the selected mode in the **4 Position Rotary Switch**. It's intention is to control 3 motors, which will turn on or off based on the temperature that it reaches.

When the temperature reaches 140ºC, 170ºC or 180ºC (depending on the mode) it feeds a relay that controls the first motor,

and also starts a timer that can be 12, 20 or 33 minutes which also depends on the mode.

There will be two push buttons, one will add +1min to the time (and start the timer if there isn't one already), and the other will reduce -1min to the time.

When the timer stops, a buzzer starts making noise and also feeds the other 2 relays that controls the second & third motor.

> Motors can only be stopped manually by either the security button or through the web interface. If Motor 2 or Motor 3 are stopped via the web interface, they will stop any action taken after the timer stops.

## Resources

### DHT22

MicroPython built-in dht library.

### MAX6675

https://github.com/BetaRavener/micropython-hw-lib/blob/master/MAX6675/max6675.py

### LCD

Uses both the API (lcd_api) and the machine module (machine_i2c_lcd).

https://github.com/dhylands/python_lcd

### Web Server

I made my own module that supports sse based on https://github.com/troublegum/micropyserver and this fork https://github.com/ferdinandog/micropyserver/tree/new-utils