Trying to implement y modem protocol in uart example

RE: Trying to implement y modem protocol in uart example

Karl Ylvisaker — Thu, 27 Oct 2022 12:41:08 GMT

[quote user="Harish_C_S_"]Thanks For Your Reply[/quote]

No problem at all, I am happy to help!

Thank you for elaborating. It sounds to me like you would not need to have an actual Y-modem protocol in place on your peripheral device then, but rather just a method to parse the incoming data, is this a correct understanding of it?
I unfortunately have no personal experience with the Y-modem protocol/format.

You can check out this Image Transfer example to see how you can go about transferring a larger file over the NUS service. In the demo there is created a custom service to do the transfer, but it essentially functions as the NUS service does.

Best regards,
Karl

RE: Trying to implement y modem protocol in uart example

Harish_C_S_ — Thu, 27 Oct 2022 12:09:33 GMT

Hello Karl,

Thanks For Your Reply

I am using nRF5 SDK 17.0.0, Basically, we are designing an application in which I receive data in the y-modem format from the Wirepas Network.

So, As a First Phase, I am using TeraTerm to send the File in Y-modem protocol and receive it through the UART port of the nRF52840 DK and Perform a Background DFU update.

In order to do it, I want to send a dummy file from the TeraTerm in the y-modem protocol and receive the file on my nRF device.

RE: Trying to implement y modem protocol in uart example

Karl Ylvisaker — Thu, 27 Oct 2022 11:36:15 GMT

Hello,

Are you using the nRF5 SDK or the nRF Connect SDK?
In general, there will be no need to implement any modem protocol in order to perform a file transfer using the NUS service (as shown in ble_app_uart examples).
You can split the file into segments and then sequentially transfer the file to the connected device over the NUS service.

Best regards,
Karl