BLE not advertising when TWI pins are changed

RE: BLE not advertising when TWI pins are changed

Vishnu Pradeep — Wed, 26 Oct 2016 11:07:49 GMT

HI @Sri_guy , It is working. It is not working when I make the SCL and SDA Pins to P0.6 and P0.7 respectively. I commented the Uart_config() code and the TWI is not working? Is there any way I can make those two pins SCL and SDA?

RE: BLE not advertising when TWI pins are changed

MartinBL — Mon, 24 Oct 2016 07:52:34 GMT

Hi @Sri_guy. The UART (terminal) issue should be fixed now. I just pushed an update to git. Of some reason the example used the wrong UART library. Note that you have to be in a connection to see accelerometer values on the terminal.

RE: BLE not advertising when TWI pins are changed

Sri_guy — Sun, 23 Oct 2016 02:09:16 GMT

Hi Vishnu, I saw your post. Did you get your system to work? I am using the MPU 6050 for my project. I tried using the github examples. When I tried to use the 'nrf5-ble-simple-mpu' and I believe it was advertising but I was not able to stream any data from either the terminal on my pc or from my phone either. I tried changing the pins to 28 and 29 but it did not seem to change anything.

RE: BLE not advertising when TWI pins are changed

Jørgen Holmefjord — Thu, 20 Oct 2016 11:50:32 GMT

As you can see in the documentation I linked above, pin 7 and 8 is used by the UART connected to the Interface MCU. You should select some other pins, for instance 22-31.

RE: BLE not advertising when TWI pins are changed

Vishnu Pradeep — Thu, 20 Oct 2016 11:46:13 GMT

I tried to change to 7 & 8 instead of 3 & 4 respectively which I now found that is connected to UART service. Thanks for sending the connection details.

RE: BLE not advertising when TWI pins are changed

Jørgen Holmefjord — Thu, 20 Oct 2016 11:07:12 GMT

Hi,

Which pins did you try to change it to? Make sure that you use some pins not connected to other devices or componentes on the nRF52-DK. I see that SCL and SDA pins in your nrf_drv_config.h file is set to 0 and 1 for TWI0 interface. These pins are connected to the 32 kHz crystal on the DK board.

I tested changing the pins to 28 and 29, this seems to work just fine.

Best regards,

Jørgen