Hi I have a ItsyBitsy M0 Express. I want to connect a RS485 Halfduplex with just the 2 wires A and B. I have connected a converter wich makes out of the differntial signal of the AB RX/TX. I have just left the MISO and MOSI pins. The connected part just sends 2 bytes after it received 2 bytes from ItsyBitsy, can you send me just such an INO code? Let me know how much it costs. Thanks Franz
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Hello. I have a experience for arduino communication. the RS485 is serial communication. the important is control for select RX/TX. how do you connect the converter? and what is MOSI and MISO left? Regards.
Hi you should connect #0 and #1 pin for serial Rx and Tx "SCK/MOSI/MISO - These are the hardware SPI pins" also you connect the rs485 converter de/re pin to gpio output to set direction
hello dear i think you have to use serial port of arduino not the spi, also do you use max485 as a converter AB/RS232 ? finally you can find many exemple in arduino ide select : file > exemples thanks aymen