Chigo air conditioner fan network version

Chigo air conditioner fan network version

A Chigo air-conditioning fan is modified based on the AT32F421 microcontroller and the Tuya wifi module. The Tuya app is used for LAN and remote control, and the development method uses the SDK.

Appearance of air conditioning fan:

Opening:

Open the Tianling cover:

Control panel:

Motor: Because water leaked into the motor during the last wash, the bearings were removed and replaced. The swing fan motor also burned out, so I dismantled it more thoroughly.

The focus is still on the Kanban board:

There are 5 touch buttons; a digital tube that displays real-time temperature and reservation time; a buzzer that beeps when pressed; and a bunch of LED lights.

The power supply of the main control uses a non-isolated solution, AC 220V to DC5.0V;

Motor speed is controlled using a thyristor.

On the back is a microcontroller plus a digital tube driver chip

Replace bearings:

Solution: There are two options

1. Redesign the entire board

2. Install a control board based on the original board

After looking at it, I obviously chose the second option, mainly because I was too lazy to put in the effort, and this time it was just a modification.

Design idea: The Tuya module communicates with the main control, controls 5 touch keys according to the command, and detects the control pin status of all thyristors at the same time.

So the schematic is as follows:

The power supply of the microcontroller and wifi module is 3.3V, so they are all isolated using 4148.

The final assembly effect is as follows:

App control effect: