UART Connection NRF52832 with Raspberry Pi

RE: UART Connection NRF52832 with Raspberry Pi

Ashiq Mohammed — Fri, 19 Jul 2019 13:59:47 GMT

Sherif - you can't see serial output data using LED, serial output should be connected with proper serial support device which should have the feature of Tx/Rx like Raspberry Pi.

RE: UART Connection NRF52832 with Raspberry Pi

sherif — Sun, 14 Jul 2019 16:21:54 GMT

@AShiq: i am trying to do the same. but instead of rpi i use a led to see the data output, also i tried with a usb to serial to input the data again which was sent. but i failed. Could you please help me.

RE: UART Connection NRF52832 with Raspberry Pi

Ashiq Mohammed — Sat, 10 Nov 2018 04:45:30 GMT

Thanks Jorgen, I have removed RTS and CTS and updated my Python code as below, now UART is working fine.

thanks for your great support.

def Uart_Serial_Read():
  try:  
    ser = serial.Serial ("/dev/serial0")
    ser.baudrate = 115200
    print ("Serial com program start here..")
    i=1
    while True:
               data = ser.readline()
               l=len(data)
               print "Length: ", l," Itration : ",i
               for j in range(0, l-1):
                                  print(ord(data[j:j+1])),
               print ""
               i=i+1
    ser.close()
   except:
    Uart_Serial_Read() 
import serial
Uart_Serial_Read()

RE: UART Connection NRF52832 with Raspberry Pi

Jørgen Holmefjord — Fri, 09 Nov 2018 10:19:53 GMT

I meant if you have tested to view UART data in a terminal, to see if the issue is with the HW or with your Python code.

RE: UART Connection NRF52832 with Raspberry Pi

Ashiq Mohammed — Thu, 08 Nov 2018 15:53:19 GMT

Yes I can able to view all the data in RTT viewer.

RE: UART Connection NRF52832 with Raspberry Pi

Jørgen Holmefjord — Thu, 08 Nov 2018 14:37:38 GMT

Have you tested it you are able to receive data in a terminal software?

RE: UART Connection NRF52832 with Raspberry Pi

Ashiq Mohammed — Wed, 07 Nov 2018 16:05:52 GMT

I have taken the same BLE_app_UART example code as it is , just I have hard coded pin numbers.

app_uart_comm_params_t const comm_params =
    {
        .rx_pin_no    = RX_PIN_NUMBER,
        .tx_pin_no    = TX_PIN_NUMBER,
        .rts_pin_no   = RTS_PIN_NUMBER,
        .cts_pin_no   = CTS_PIN_NUMBER,
        .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
        .use_parity   = false,
        .baud_rate    = UART_BAUDRATE_BAUDRATE_Baud115200
    };

In Python ser.read() working one time and printing values, for the next cycle showing 'raise portNotOpenError'.

If I change to ser.readline(), I am getting 32 data values from Adv report. and next cycle showing 'raise portNotOpenError'.

I am not able to find out config.h associated with this project.

RE: UART Connection NRF52832 with Raspberry Pi

Jakub Rzeszutko — Wed, 07 Nov 2018 10:20:08 GMT

Why did you configure and connect RTS/CTS while you are not using it?

.flow_control = APP_UART_FLOW_CONTROL_DISABLED

RE: UART Connection NRF52832 with Raspberry Pi

Toyman — Wed, 07 Nov 2018 06:58:12 GMT

do you have UART enabled in config.h?