UART Module

[Eugene0469]

Hello.

I have been working with the nrf525840 dongle using SDK 15.2.0 trying to build a UART Service. I used the ble_app_uart example project that comes with the SDK and it worked well. I tried transferring the UART part of the program to the ble_app_blinky project but so far, when I run the program, it advertises successfully, shows me the UART service and even reads values using the TX characteristic. The problem is, not the entire data is displayed in the characteristic.  I thought it might be an issue to either do with the MTU, data length or the TX and RX buffer and I therefore and set the MTU and data length to 247 and 251 respectively and I increased the size of my buffers to 1024. This did not solve the problem. When I debug, I get a COMMUNICATION error in the uart_even_handler function. I've been doing some research on how to solve the issue and I am yet to find a solution. Any help will be greatly appreciated

Also, I am yet to try this, but is it possible to build a UART service for the Nordic thingy? 

[Jørgen Holmefjord]

Hi,

Are you implementing hardware UART for the device? Note that the default UART pins in the SDK examples are using GPIOs P0.05 to P0.08, while some of these pins are used for other components in the dongle. If you get communications errors in the uart_event_handler, I would expect that one of the pins are in a state where a UART line error is detected. If you do not use HW UART, I would recommend that you remove all function calls related to app_uart library in your application.

Best regards,
Jørgen