orkiman Posted April 19, 2022 Report Share Posted April 19, 2022 hi try to read RS232 data with JZ20-J-R16 I send the data : <0x2>12345678<0x3> 9600,8,1,N but SB won't turn ON. no matter what.. can someone help ? the documentation is poor.. attached my program : betsalelMatch.U90 Quote Link to comment Share on other sites More sharing options...
MVP 2021 kratmel Posted April 19, 2022 MVP 2021 Report Share Posted April 19, 2022 From manual..... The JZ20 built-in USB port may be used for programming. Add-on Modules are available by separate order for communication and cloning. Note that the USB port and an Add-on (RS232)module cannot be physically connected at the same time Then you must check connection via info mode... Quote Link to comment Share on other sites More sharing options...
orkiman Posted April 20, 2022 Author Report Share Posted April 20, 2022 solved. kratmel thanks! i use the mj20-rs rs232 communication module. the problem was i didn't cross rx and tx in the d-sub. maybe I had to cross it because I use a weird usb-to-rs232 with female end instead of the regular mail d-sub at the end. and " check connection via info mode... " is a good advice anyway this code is working 😀 1 Quote Link to comment Share on other sites More sharing options...
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