Esphome Panasonic Ac

Abstract

1. Introduction

An open source alternative for the Panasonic wi-fi adapter that works locally without the cloud.

This library works with both the CN-CNT port and the CN-WLAN port. CN-WLAN is only available on newer units. Either port can be used on units that have both ports regardless of the usage of the other port (ie. it is possible to leave the DNSK-P11 connected to CN-WLAN and connect the ESP to CN-CNT).

Works on the ESP8266 but ESP32 is preferred for the multiple hardware serial ports.

2. Objective

Open source alternative for Panasonic air condition wifi adapters that works locally without the Comfort Cloud

This project demonstrates how C++, ESP32, ESP8266 can be applied to a real-world Internet of Things (IoT) problem.

3. Key Features / Modules

• Control your AC locally via Home Assistant, MQTT or directly
• Instantly control the AC without any delay like in the Comfort Cloud app
• Receive live reports and state from the AC
• Uses the UART interface on the AC instead of the IR interface
• Provides a drop-in replacement for the Panasonic DNSK-P11 and the CZ-TACG1 wifi module

4. Technology Stack

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

• Arduino IDE / PlatformIO or a C++ compiler (g++)
• Target board (e.g. Arduino, ESP32) where applicable
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/DomiStyle/esphome-panasonic-ac.git
cd esphome-panasonic-ac

1. Pull this repository or copy the ac.yaml.example from the root folder
2. Rename the ac.yaml.example to ac.yaml
3. Uncomment the type field depending on which AC protocol you want to use
4. Adjust the ac.yaml to your needs
5. Connect your ESP
6. Run esphome ac.yaml run and choose your serial port (or do this via the Home Assistant UI)
7. If you see the handshake messages being sent (DNSK-P11) or polling requests being sent (CZ-TACG1) in the log you are good to go
8. Disconnect the ESP and continue with hardware installation

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

• Add a mobile dashboard using Blynk or Firebase
• Store readings in a cloud database for history charts
• Add alerts via SMS / Telegram when thresholds are crossed

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

1. Which microcontroller / board and sensors are used and why?
2. How does the device send data (Wi-Fi, MQTT, HTTP, Bluetooth)?
3. Where is the sensor data stored and visualised?
4. How is power consumption managed?
5. How would you secure the device and its communication?

9. Source Code & License

This project is developed by DomiStyle and published on GitHub under the MIT License. Please follow the license terms and credit the original author when you use or modify this code.