[Training Camp] Tuya Training Camp Disinfection Controller 947086A

Tuya training camp disinfection controller has timing/jumping web page functions.

1. Circuit part

Based on the ch55x platform, the cheapest ch551 chip is welded. Since ch551 is a reduced version of 552, use the 552 SDK. Use the ch552 header file to replace the ch554 project.

The latest sdk of ch554 is version 2019-07-23, click here to download

Header file to be replaced, click here to download

Physical map

The official downloader ( siptool download ) provides keil code integration.

However, I tried several machines but could not integrate it well, so I had to choose other 51 chips in keil. But there is no problem in using it.

Since the 128-byte DataFlash is smaller, an additional memory chip is used at24c02, both of which support rewriting data in bytes.

Use 2 GPIO ports to simulate the I2C interface and connect to the eeprom chip.

2. Application part

Tuya’s cloud function is relatively simple

Enter the app panel configuration

Tuya’s WBR3 module uses the RTL8720CF Wi-Fi Bluetooth dual-mode chip. Unfortunately, only general firmware is available.

The peripherals only have 9×GPIOs, 1×UART, and 1×Log_Tx. The MCU SDK that was released (May 28, 2020) has been relatively complete.

The "Tuya Module Debugging Assistant" written in C# is provided to facilitate developers' debugging. This is also the standard host computer for enterprises.

It has a full range of functions, most of which are unused.

The module uses a universal serial port protocol, the baud rate is 9600/115200, which is relatively simple and cannot be dismantled much in the development-free mode.

The module uses RTL8720CF. This KM4 (based on Armv8M) has not been released. The parameters of this chip are inferior to the 8051 used this time.