This project designed an STM32 data collector, with stm32f103vet6 as the core master control, which is mainly used for sensor data collection and analysis, data uploading and offline storage. Functions: 1. Perform RS-485 communication through the sp3485 chip to obtain data returned by peripherals; 2. Obtain real-time time from the onboard DS3231 clock chip; 3. Write real-time detection data to the onboard SD card; 4. Complete through the external serial port Cloud communication. Power supply: 1. Onboard REF3030 series LDO voltage regulator, which is used as the ADC reference voltage to process the analog signals obtained by the acquisition board. 2. The on-board 262 package 7805 linear voltage regulator regulates the input voltage of 7V-30V (typically 12V). 3. The onboard AMS1117-3.3 voltage regulator generates the voltage required by the digital chip.
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