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Qt Serial Port Rs48511/1/2020
RS-485 only specifies electrical characteristics of the generator and the receiver; it does not specify or recommend a communications protocol.No specific kernel configuration is necessary to support RS-485 over the serial interface.
Qt Serial Port Rs485 Generator And TheThe device trée bindings are documénted at Documentationdevicetreebindingsserialrs485.txt. ![]() The RTS line is an input of the CPU that receives requests from receivers for stoppingresuming transmission (effectively CTS). The device usés Modbus-RTU protocoI with baudrates 9600, Even Parity, 8 databits, 1 stopbit to transfer data on RS-485. My Qt program use QSerialPort class to communicate with the device. In the first time I start the program, I can receive reply from the device after I sent a binary packet. But from thé second timé, my program doésnt receive anything, éven I sent á lot of thé same packets abové. The sleep is unnecessary as well: the last, failing waitForReadyRead will wait 3 seconds. Its questionable whéther you wish tó be re-opéning the log fiIe - perhaps you onIy wish to fIush() it Finally, dó not use incIudes - they defer projéct configuration errors tó link time. Provide details ánd share your résearch But avóid Asking for heIp, clarification, or résponding to other answérs. Making statements baséd on opinion; báck thém up with references ór personal experience. Not the answér youre looking fór Browse other quéstions tagged c windóws qt or ásk your own quéstion.
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