nRF52 dk as UART module to connect custom board

RE: nRF52 dk as UART module to connect custom board

shmuel.d — Sun, 04 Nov 2018 11:10:22 GMT

Thanks, it worked

RE: nRF52 dk as UART module to connect custom board

Kenneth — Thu, 01 Nov 2018 16:52:56 GMT

You don't need to cut any wires, as long as the nRF52832 chip on-board don't control the pins (for instance erase the chip by 'nrfjprog --eraseall' will cause pins 5, 6, 7 and 8 to floating state), then you can directly connect the UART pins on your board to the pin header on the nRF52-DK. In addition you need to connect GND on your board to the DK, and have the same supply range (around ~3V).

If that doesn't work then you likely need to have a logic analyzer to check if you can see data on both TXD and RXD lines, and possible hardware flow control pins if enabled.

Best regards,
Kenneth

RE: nRF52 dk as UART module to connect custom board

awneil — Thu, 01 Nov 2018 12:11:34 GMT

Wouldn't it be simpler just to use an ordinary off-the-shelf USB-to-UART module or cable?

eg,

https://www.ftdichip.com/Products/Cables/USBTTLSerial.htm

https://www.ftdichip.com/Products/Modules/DevelopmentModules.htm