https://github.com/auralius/iot-temperature-control

IoT demo with a PID-controller thermal system
https://github.com/auralius/iot-temperature-control

arduino-uno esp8266 iot-application pid

Last synced: 23 days ago
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IoT demo with a PID-controller thermal system

• Host: GitHub
• URL: https://github.com/auralius/iot-temperature-control
• Owner: auralius
• Created: 2024-12-29T02:43:03.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2025-01-01T21:43:32.000Z (over 1 year ago)
• Last Synced: 2025-01-16T02:56:04.608Z (over 1 year ago)
• Topics: arduino-uno, esp8266, iot-application, pid
• Language: C++
• Homepage:
• Size: 1.8 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# iot-temperature-control

The temperature control device that we use here is described [in this page](https://www.notion.so/Universitas-Pertamina-Temperature-Control-Device-02b5a889e17d4ee9ae5521881e55af0d). [This link](https://github.com/auralius/up_temperature_control_device) leads to the GitHub repository of the device. Details on the PID control can be found [here](https://github.com/auralius/arduino-pid-template/tree/thermal).

Since the temperature control device is built on top of an Arduino Uno, we add an ESP8266 to allow internet communications.

## The Scenario

* We only use one of the two available heaters.

* There are two exchanged variables in the overall system:

  * ```PV```: process value, which is the current temperature of the heater.

  * ```SV```: set value, which is the desired (reference) temperature of the heater.

* A PID control loop is running (1kHz, realtime) in the Arduino Uno.

* Arduino Uno sends ```PV``` to ESP8266. ESP8266 publishes ```PV```.  MQTT server subscribes ```PV```.

* MQTT server publishes ```SV```. ESP8266 subscribes ```SV```. ESP8266 sends ```SV```to Arduino Uno.

* Communication loop between Arduino Uno and ESP8266 runs at a much lower rate (less than 1 Hz, not realtime).

## The System



## The Concept

![](https://github.com/auralius/iot-temperature-control/blob/main/images/concept.png)

## Arduno Uno - ESP8266 Serial Communication

![](https://github.com/auralius/iot-temperature-control/blob/main/images/wiring.png)

The implementation of the serial communication follows [this link](https://forum.arduino.cc/t/serial-input-basics-updated/382007).