A recent project using the RC531 read card function, read the M1 card and CPU card, still working at the beginning, but after a period of time can't find the card, and ask the reason why will appear this kind of circumstance,=how to check and modify

CodePudding user response:

Make sure no hardware problems, to use oscilloscope to see credit card pin if there is a change,
Simulation, then the software, you can online to see where is the card, can't simulation, increase the printf in driver code, see where card here

CodePudding user response:

Is not the card, the hardware chip is broken

CodePudding user response:

Hardware chip bad? May be your program to run to fly?

CodePudding user response:

The program can run for several days, no problem