1. If the MCU has a serial port peripheral, plus a level conversion chip, such as MAX232, SP3485, it is the RS232 and RS485 interface. 2. RS485 uses differential signal negative logic, +2~+6V represen
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SMS sending and receiving ShenDa PDA sends short messages, and the server receives the mobile Windows Mobile system using the public network, the server receives, two programs contact QQ 412925762
When communicating with the lower computer, I send a command but there is always no return value. I don't know why. Is there any way to solve it? Change the baud rate? Increase the waiting time?
[i=s]This post was last edited by chenbingjy on 2016-5-19 11:55[/i]It says that after compiling, three image files will be generated in the directory /out/target... I have compiled it, why can't I fin
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