Raspberry issue

[Ivormise]

Last raspbian with last python. First example.

rpi@raspberrypi:~ $ python lora.py
Initialization: {} Success
Retrieve configuration: {} Data size not match!
----------------------------------------
Traceback (most recent call last):
  File "/home/rpi/lora.py", line 17, in <module>
    print_configuration(configuration)
  File "/home/rpi/.local/lib/python3.11/site-packages/lora_e220.py", line 245, in print_configuration
    print("HEAD : ", hex(configuration._COMMAND), " ", hex(configuration._STARTING_ADDRESS), " ",
                         ^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute '_COMMAND'

[kervendurdy]

The issue you encountered may be related to a conflict with the serial port, as it was already being used by another Linux service on your device. Specifically, the service was occupying the port, preventing your script from accessing it.

To resolve the problem, you can identify the service using the port, stop it, and then disable it to prevent future conflicts. After performing these steps and rerunning your script, the code should execute without any issues.

You may use the following steps to address the problem:

Identify the Service Using the Serial Port:
lsof /dev/ttyS3

This command will list the process and service utilizing the /dev/ttyS3 port.

Stop the Service:
sudo systemctl stop [service_name]

Disable the Service:
sudo systemctl disable [service_name]

Rerun Your Script:
Once the service is stopped and disabled, execute your script again. It should now function without any conflicts.

By ensuring no conflicting services are running on the same serial port, you can achieve stable and reliable operation of your LoRa communication script.

[Ivormise]

By ensuring no conflicting services are running on the same serial port, you can achieve stable and reliable operation of your LoRa communication script.

I disabled the agetty service, the port is free but does not work.

rpi@raspberrypi:~ $ sudo lsof /dev/serial0
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
      Output information may be incomplete.
lsof: WARNING: can't stat() fuse.portal file system /run/user/1000/doc
      Output information may be incomplete.
rpi@raspberrypi:~ $ sudo python lora.py
Initialization: {} Success
Retrieve configuration: {} Data size not match!
----------------------------------------
Traceback (most recent call last):
  File "/home/rpi/lora.py", line 17, in <module>
    print_configuration(configuration)
  File "/usr/local/lib/python3.11/dist-packages/lora_e220.py", line 245, in print_configuration
    print("HEAD : ", hex(configuration._COMMAND), " ", hex(configuration._STARTING_ADDRESS), " ",
                         ^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute '_COMMAND'

[kervendurdy]

To troubleshoot your issue, please ensure the following steps are followed:

Verify Wiring Diagram: Double-check your wiring diagram to ensure all connections are correct.

Configure Pin Numbers in Code: Make sure the pin numbers in your code match your wiring configuration. An example configuration might look like this:

import serial
from lora_e220 import LoRaE220, ResponseStatusCode

loraSerial = serial.Serial('/dev/serial0') # Additional parameters: baudrate=9600, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE
lora = LoRaE220('900T22D', loraSerial, aux_pin=7, m0_pin=8, m1_pin=9)

code = lora.begin()
print(f"Initialization: {ResponseStatusCode.get_description(code)}")

print_configuration(configuration)

In your case the initialization is successful, it indicates that the AUX pin is correctly configured. However, an incorrect configuration of the M0 and M1 pin can lead to issues.

Check TX and RX Connections:

Connect the TX pin of your LoRa device to the RX pin of your Raspberry Pi.
Connect the RX pin of your LoRa device to the TX pin of your Raspberry Pi.
Retry After Verification: Ensure all connections are secure and properly aligned, then test the setup again.

By following these steps, you can ensure the proper configuration and operation of your LoRa device with the Raspberry Pi.

[wany11]

The problem still persists, even with changing the configuration. Please find a fix

[pfugazzi]

Hi same issue, any update?