Introduction - If you have any usage issues, please Google them yourself
Portable alcohol tester: The STC12 MCU as the next crew acquisition drunk driving message, alcohol measured using MQ-3, and by nRF24L01 wireless module to transfer data to the PC host computer, PC-off nRF24L01 receive data through STM8S MCU control, and through the CH340 (USB turn string) upload the data to PC, PC side using VB preparation of PC monitoring software, information registration drunk driving.