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: 10 days 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 (8 months ago)
• Default Branch: main
• Last Pushed: 2025-03-10T00:16:15.000Z (4 months ago)
• Last Synced: 2025-03-10T01:30:34.044Z (4 months ago)
• Topics: esp32, microcontrollers, micropython, micropython-esp32
• Language: Python
• Homepage:
• Size: 80.1 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) (WIP)

- [Hardware](#hardware) (WIP)

- [Software](#software) (WIP)

- [Wiring](#wiring) (WIP)

- [Resources](#resources)

## Summary

All logic depends on the data given by the **Thermocouple (MAX6675)** & **AHT20** sensors. 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 the value set on the config, it feeds a relay that controls the first motor,

and also starts a timer that was set on the config. Extra configs can be saved.

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 app interface.

## Wiring

| ESP-32 | MAX6675 | AHT20 i2C | LCD i2C | R1  | R2  | R3  | BUZZ |

| ------ | ------- | --------- | ------- | --- | --- | --- | ---- |

| GPIO5  | SCK     |           |         |     |     |     |      |

| GPIO13 |         |           |         |     |     |     | x    |

| GPIO16 |         | SCL       |         |     |     |     |      |

| GPIO17 |         | SDA       |         |     |     |     |      |

| GPIO19 | SO      |           |         |     |     |     |      |

| GPIO21 |         |           | SDA     |     |     |     |      |

| GPIO22 |         |           | SCL     |     |     |     |      |

| GPIO23 | CS      |           |         |     |     |     |      |

| GPIO25 |         |           |         | x   |     |     |      |

| GPIO26 |         |           |         |     | x   |     |      |

| GPIO27 |         |           |         |     |     | x   |      |

> R: Relay

## Resources

### AHTx0

MicroPython AHT20 driver library.

https://github.com/targetblank/micropython_ahtx0

### 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

Uses the Microdot framework https://github.com/miguelgrinberg/microdot