AWS IoT ExpressLink SARA-R5 Starter Kit V2 Connections registrations issues

Wireless & IoT Cellular
1

Hello, I’m trying to follow the official documentation https://content.u-blox.com/sites/defaul … 042016.pdf when registering for AWS.

  • I don’t see the message “Welcome to u-blox AWS IoT ExpressLink SARA-R5”

  • I do see the message “OK” when doing the “AT” command

  • When executing the command “AT+CONF EndPoint=xxxxxxx-ats.iot.us-east-1.amazonaws.com” I get “ERR11 UNKNOWN KEY”

    • I’m using an m1 MacBook air and coolterm to connect this is my configuration.
    Untitled.jpg
    Untitled.jpg1920×1080 256 KB

    2

    We are facing the same issue.

    3

    We will look into this issue soon and see what the problem is. I am not sure off the top of my head as the product should work as instructed via documentation.

    4

    Try performing a factory reset https://content.u-blox.com/sites/defaul … 042016.pdf (page 18) and see if that helps - any luck?

    5

    The factory reset apparently did work.

    Also instead of using CoolTerm I started using Pyserial for reproducibility:

    import serial
import time

# Replace with your COM port
COM_PORT = '/dev/cu.usbserial-110'
BAUD_RATE = 115200

def send_command(ser, command):
    ser.write((command + '\r\n').encode())
    time.sleep(1)

    while ser.in_waiting:
        response = ser.readline().decode().strip()
        print(response)
        return response

def main():
    # Connect to the board
    ser = serial.Serial(COM_PORT, BAUD_RATE, timeout=1)
    print('Connected to the board')

    # Wait for the welcome message
    while not send_command(ser, 'AT'):
        time.sleep(1)

    # Configure the board
    # Replace with your actual commands
    response = send_command(ser, 'AT+FACTORY_RESET')
    print("Response from the board: ", response)

    # Close the connection
    ser.close()

if __name__ == '__main__':
    main()

    Response:

    ❯ python3.11 reset.py    
Connected to the board
OK
OK
Response from the board:  OK

    But before and after the reset with this script:

    import serial
import time

# Replace with your COM port
COM_PORT = '/dev/cu.usbserial-110'
BAUD_RATE = 115200

def send_command(ser, command):
    ser.write((command + '\r\n').encode())
    time.sleep(1)

    while ser.in_waiting:
        response = ser.readline().decode().strip()
        print(response)
        return response

def main():
    # Connect to the board
    ser = serial.Serial(COM_PORT, BAUD_RATE, timeout=1)
    print('Connected to the board')

    # Wait for the welcome message
    while not send_command(ser, 'AT'):
        time.sleep(1)

    # Configure the board
    # Replace with your actual commands
    response = send_command(ser, 'AT+CONF EndPoint=xxxxxx-ats.iot.us-east-1.amazonaws.com')
    print("Response from the board: ", response)

    # Close the connection
    ser.close()

if __name__ == '__main__':
    main()

    I get this error:

    ❯ python3.11 configure.py
Connected to the board
OK
ERR11 UNKNOWN KEY
Response from the board:  ERR11 UNKNOWN KEY

    Which is the same I was getting before.

    6

    Ok, now that the board is at least responding when hooked up, the error for an unknown key is usually a typo either in the key itself or the code that uses it - try using the AWS key elsewhere, or performing some other sandbox-style test…are the keys functional otherwise?

    7

    Yes, I was able to move forward. The documentation is wrong; the error here(https://docs.aws.amazon.com/iot-express … lpg-table2) says:

    5.1.1.5   ERR11 UNKNOWN KEY
If the parameter name (key) is not found in Table 2 - Configuration dictionary persistent keys or Table 3 - Configuration dictionary non-persistent keys , then the module returns 'ERR11 UNKNOWN KEY'.

    And on the table, the key is Endpoint on the docs is EndPoint.

    8

    Ok so I don’t know if the documentation is up to date I was able to advance when doing AT+CONF Endpoint=

    But now that I try to get the cert as per the doc I only get:

    AT+CONF? Certificate
OK

    But no cert text am I missing something?

    9

    Having same issue, except:

    • I can see “OK” after “AT” (= my terminal settings seems correct)
    • “AT+FACTORY_RESET” prompts “OK” and “Rebooting…” (it did not help)
    • if I write “AT+NONSENSE” I get “ERR3 COMMAND NOT FOUND” (=command line interpreting itself works)
    • only thing that is missing is this “Welcome to u-blox AWS IoT ExpressLink SARA-R5” in the beginning

    What could be wrong?