Use WB3S as the cloud communication module and use universal firmware. The cheaper STM32F030C6T6TR is used as the main control, collecting temperature, humidity sensor and light sensor data, displaying it on OLED, and uploading it to the cloud through the communication module.
1. STM32
STM32 minimal system and adds a wake-up button and status light
2. Graffiti module
Using WB3S, a universal firmware solution.
3. Peripherals
The sensor data is collected by STM32, displayed by OLED, and reported by the Tuya module.
4. Power supply,
LM1117_3.3V solution
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