Wifi module hard- and software

The module is designed to enhance air conditioners produced by the AUX brand by incorporating the ESP8266 chip for Wi-Fi connectivity. The ESP8266 enables remote control and monitoring of AUX air conditioners through compatible devices. Notably, the module physically resembles a USB plug, but it is emphasized that it is not USB-compatible due to a significant voltage difference (16 volts versus the standard 5 volts of USB devices).

Connecting regular USB devices may lead to damage or overheating. The module’s software is open source, based on the esphome project, allowing users to customize the firmware. This open source nature promotes transparency, community collaboration, and adaptability, empowering users to tailor the module to their specific needs.

The above schematics illustrate the ESP32 microcontroller and its connections (with the power regulator omitted for clarity). Notably, the design features three 10k resistors, which play specific roles in the circuit, such as current limiting, voltage division, or pull-up/pull-down functionalities.

Furthermore, it’s crucial to highlight that the RX (Receive) and TX (Transmit) pins of the ESP32 are intentionally connected to the RX and TX pins of the air conditioner through a USB-like connector. This connection implies a direct communication link between the ESP32 module and the air conditioner, akin to a USB interface, facilitating data exchange between the two components. The USB-like connector serves as the interface point for seamless interaction and control between the ESP32 microcontroller and the air conditioning system.

Resources & credits:

Monsultancy.eu did not develop the WiFi module for AUX-based air conditioners from the ground up. Numerous contributors played a role in its creation. Explore the links below for access to the original software and engage in discussions related to the initial WiFi module used in (certain) air conditioners based on AUX.