This is an oven controller based on the ESP8266 module and Arduino framework. It uses a rotary encoder for input and 128x64 OLED as a display. This should work fine on other Arduino framework capable hardware too, such as the ESP32.
Copy config_example.h to config.h in the same directory as the sketches and modify at least SSID and KEY.
| Name (in config.h) | Default | Type | Description |
|---|---|---|---|
| SSID | "your_ssid" | String | Wifi Network name (SSID) |
| KEY | "your_sup3r_s3cur3_p4ssw0rd" | String | WiFi Password/Key |
| OTA_PASSWORD | "your_ota_password" | String | OTA password used to update from Arduino IDE over the air |
| OTA_NAME | "ESP8266Oven" | String | Name of device (should show up in Arduino IDE) |
| USE_SSD1306 | - | Define | Use SSD1306 display, recommended. Display code stubbed out if not defined |
| RINGBUF_LEN | 480 | Integer | Length of Ring Buffer for measurements (depends on available RAM, default was found to be sensible) |
| SAMPLE_INTERVAL | 15000 | Integer | Milliseconds between taking measurements (Default 15s) |
| STATE_TIMEOUT | 300000 | Integer | State timeout (ms), go back to status screen after this time (Default 30s) |
| PID_INTERVAL | 1000 | Integer | Time (ms) between PID loop executions (Default 1s) |
| START_TEMP | 20 | Integer | Default starting temperature (Celsius) when setting via rotary encode (Default 20°C) |
| DEBOUNCE_TIME | 50 | Integer | Debounce time (ms), this should be fine as default |
| BUTTON | D0 | Arduino data pin | Button attached to this arduino pin |
| RELAY | D8 | Arduino data pin | Element relay pin |
| TC_DO | D5 | Arduino data pin | Thermocouple data pin |
| TC_CS | D6 | Arduino data pin | Thermocouple chip select |
| TC_CLK | D7 | Arduino data pin | Thermocouple clk pin |
| BANDGAP | 5 | Integer | Hysteresis for on/off switching |
| HEAT_OFFSET | 15 | Integer | If temp goes below setpoint-HEAT_OFFSET, activate element |
| PREHEAT_DIFF_THRESHOLD | 35 | Integer | If within PREHEAT_DIFF_THRESHOLD degrees of setpoint switch to PID mode, was an attempt to speed up pre-heating |
- ESP8266 module Eg: NodeMCU v3
- SSD1306 based OLED display Eg: SSD1306 128x64 display
- Rotary encoder Eg: 20 step rotary encoder
- MAX31855 + K-Type Thermocouple Eg: MAX31855 Module K Type Thermocouple
- Display time and temperature on status screen
- Temperature control
- Timer (turn off heating element after set amount of minutes)
- Basic web interface showing set point and current temperature
- REST interface to set PID parameters if used, and switch between "dumb" and PID mode.
- Simple rotary encoder controlled based UI