You can fix it by either declaring value as a uint8_t in your CPP code (after including stdint.h) or only reading chunks of 4 bytes on the Arduino and then parsing what you get. It's wrong, irredeemably broken, because the sleep starts when the data is appended to the kernel buffer, not when it gets transmitted. So what you get for every value you send to the Arduino is exactly what you'd expect and what you see in your shell - the result you want ( openn = 0x14), followed by 3 gibberish results (because of the leading zero bytes). NET serial port is notorious for making it easy to write horrible code : As far as reviewing yours, I can't get past the usage of Thread.Sleep(). However, your second sketch handled unknown bytes (such as 0x00) by printing gggg. The Arduino merely ignored those leading zeros. Your first sketch worked because you didn't provide any else clause for unrecognized bytes. You're reading a single byte in every loop() iteration. Your processor is apparently little-endian so the order of bytes sent is 0x14, 0x00, 0x00, 0x00.
Since value is an int, which is typically 4 bytes in size for PC compilers/processors, when you send 20, what actually gets to the Arduino is 0x00000014. You're writing sizeof(value) bytes to the Arduino.
What went wrong? The led blinked correctly but the output string is wrong. Serial.print(incomingData) // new line added ReadFile(SP->hSerial, &tempCharacter, sizeof(char), &bytesRead, NULL) īut now I want to add another condition in my Arduino code: int LedPin= 10 * I have no idea what is this for? (SP->status.cbInQue) */ĬlearCommError(SP->hSerial, &SP->errors, &SP->status) If you use eMbedded Visual C++, then the project file is automatically converted.
Industrial Communication protocols 3964,3964R,rk512,as511,MODBUS. To include this library into you Windows CE project, just add the Serial.dsp project file to your own workspace. Serial I/O, Serial Port I/O support serial file transfer protocols ZMODEM file server, YMODEM, XMODEM-1K, KERMIT, ASCII. Serial communications functions, Serial Component, read write serial port, send data to serial port Library. You just specify the device name in the initial open function. It can use the on-board serial port, or any USB serial device with no special distinctions between them. SuperCom is a serial port communication library. WiringPi includes a simplified serial port handling library. BOOL retVal = WriteFile(SP->hSerial, &value, sizeof(value), &bytesSend, NULL) Serial Communications Library for Windows and Linux.