Can nrf51822+cp2102 set as a USB dongle

[chenyu]

Hi: I have no dongle or any other Dev board such as PCA10031. Can I use nrf51822 and cp2102 as a usb dongle to work with MCU of PC? If the answer is yes, what should I do? Thank you very much!

[Hung Bui]

Hi Chenyu,

I think should be possible. Make sure you have the driver for the USB-UART dongle (cp2102), then make sure you connect the same UART pins as with our Dongle and DK kit (P0.08= RTS, P0.09=TXD, P0.10= CTS, P011= RXD).

[awneil]

So many things to miss or get wrong - that's why you really should start with a Dev Kit!

[chenyu]

I havn't the right HEX file for 518222 to be a dongle.I 've try flash"J-Link OB-SAM3U128-V2-NordicSemi 160212" or "nrf51822aa_atsam3u2c_if_mbed_V0218_19022015" or "nrf51822aa_atsam3u2c_if_mbed_V0219_02022016"But all of the can't be recognized by MCP software,and give a notice of "no response from master emulator". Can you provide a right Hex file? Is a softdevice needed befor flash dongle hex file?

[Hung Bui]

Hi Chenyu,

You need to tell me how you connect the nRF51822 to the cp2102. The hex files you mentioned were not for the nRF51 but the interface CPU on the dev kit that you don't have.

And I agree with Awneil, it's easier that you get started with a DevKit.

[chenyu]

Oh, I connect the pin between 51822 and cp2102 as(P0.08= RTS, P0.09=TXD, P0.10= CTS, P011= RXD), Thr probable reason is I havn't a rigtht hex file for nrf51822.

[Hung Bui]

@Chenyu: Sorry that I thought you wanted to use the chip with the PC Master Control Panel. If not, then you are free to connect any pins. You can test with the UART example in the nRF5 SDK. Note that you need to have the driver for the cp2102 so that it opens a virtual comport on your PC.