Direct connect the IoT Device via RS-232C

Question

I have an IoT device with only Tx/Rx 2 pins and hope to get a connection via notebook PC PCH uart2 Tx/Rx 2 pins. I enabled the serial port 2 on BIOS, and I found the address 0x2f8 device here. Without any DCD and DSR pins connected. I can not get regular operation on Windows 10.

1. I tried to Add legacy hardware on Device Manager.
2. Select the Communication Port.
3. Change the Resources (I/O Range 02F8 - 02FF) and IRQ 0x000003.
   Unfortunately, I got an abnormal device after steps 1~3 rebooted my netbook PC. Device status "This device cannot start. (Code10). A device which does not exist was specified.
   I don't know about DCD and DSR issues or others? Have any chance to communicate with this device via Tx/Rx RS232C?
   Or do I need to create a new serial driver for this device?

Thanks

Carson Wu

Answer 1

It sounds like you have a UART exposed to pin header that doesn't have the RS232 transceiver. I suggest that you try the MinComm sample in the IoT Core Samples: https://github.com/ms-iot/samples to get a list of ports and test the ports.

Answer 2

Sean,
Thanks for your suggestion. That's right. I forgot the RS232 transceiver. I may need to connect a TTL for RS232. will check your suggestion MinComm code first or connect an external transceiver.