Use UART in Characteristic Tutorial

RE: Use UART in Characteristic Tutorial

Sascha — Thu, 07 Jul 2016 07:03:47 GMT

Thank you!! This was the solution. I changed

APP_UART_FLOW_CONTROL_ENABLED

APP_UART_FLOW_CONTROL_DISABLED

Now it is running. I dont need the flow control. To your question for the characteristic-master example, i used this one Characteristic Example when i download the zipped file, the folder is named "nrf5-ble-tutorial-characteristic-master" so my description. Thank you Stefan!

RE: Use UART in Characteristic Tutorial

Stefan Birnir Sverrisson — Wed, 06 Jul 2016 13:23:31 GMT

Thanks for your clarification.

Do you use UART hardware flow control? If so, then having the CTS line high prevents the UART from sending bytes.

RE: Use UART in Characteristic Tutorial

Sascha — Wed, 06 Jul 2016 13:13:17 GMT

Ok i try to explain. I want a simple hardware UART communication between the nRF51 and our microcontroller. In a simple test i only want to transfer one byte: 0x01 over UART (P0.09) from our µc to nRF51 and when received i send 0x02 back over UART(P0.11) to our µc. 0x01 will correct received by nRF51 in uart_event_handler from app_uart.c, but when i want to send 0x02 back from nRF51 to our µc, there is no data send over the uart tx pin.

RE: Use UART in Characteristic Tutorial

Stefan Birnir Sverrisson — Wed, 06 Jul 2016 12:41:58 GMT

As I understand you , you want to use UART together with BLE, am I correct? I anyway don't realize what example is "characteristic-master example" that you refer to.

Have you looked at the ble_app_uart example in the nRF5 SDK 11.0.0? It implements communication with the hardware UART and also transfers data over BLE via the NUS (Nordic UART service) service. In that example, when you send data from your microcontroller to the nRF51 via the UART, it should appear on a connected BLE peer device.

RE: Use UART in Characteristic Tutorial

Sascha — Wed, 06 Jul 2016 11:19:25 GMT

Ok, i tried something with the ble_app_template project. I include app_uart.c with

#include "app_uart.h"

and call

log_uart_init()

in main. Now i can receive rxdata in uart_event_handler from app_uart.c and work with this data. But now, when i want send some data with app_uart_put() i am stucking. I dont know why, but there will no data be send on the tx pin. What i have done wrong? Perhaps i misunderstood the uart library?