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1, this routine uses STM32F103 resources, internal clock 48MHz, SysTick interrupt 10ms
2, RTU using the serial port USART1, PA9, PA10, USART1 to open the receive interrupt, when USART1 received data to open the idle interrupt, when the idle interrupt generated as the end of the communication data to determine the basis for judgment
3、PB12 control LED blinking, blinking frequency 1Hz.

For AHTT2820, ACM483T-A, ACM483T-B

Suitable for gas flow meters such as AMS2 series, AMS1 series, AFM07 series and water flow meters such as AFD4 and AFD2 series.

Apply temperature and humidity RS485 communication protocol

Applies to AIT1001

For ADP8 series, ADP2 series, ADP9 series and other differential pressure sensors

Suitable for flow sensors such as AFS01, AFM3, etc.

For AHT2 series, AHT3 series, DHT20, DHT30, AM2315C, AM2301B

For AM232x Series, AM2315