setsockopt fails with EOPNOTSUPP

[bbfnq]

When trying to run the LoRa ABP example code (from https://docs.pycom.io/pycom_esp32/library/network.LoRa.html#network.LoRa) on a LOPY, the following line:

s.setsockopt(socket.SOL_LORA, socket.SO_DR, 5)

fails with EOPNOTSUPP.

From the console, this happens:

Connecting to a Pycom device...
Connected
>>> s2=socket.socket(socket.AF_LORA,socket.SOCK_RAW)
>>> s2.setsockopt(socket.SOL_LORA, socket.SO_DR, 5)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: [Errno 95] EOPNOTSUPP
>>> os.uname()
(sysname='LoPy', nodename='LoPy', release='1.6.7.b1', version='v1.8.6-493-g99ac80fe on 2017-03-03', machine='LoPy with ESP32', lorawan='1.0.0')

Any ideas?

[bucknall]

Hi @bbfnq I'm trying to recreate what's happening with your code, are you running anything in your main.py script?

Thanks!

[bbfnq]

Hi @bucknall

The code is exactly as in the example (except that the keys are different).

main.py:

from network import LoRa
import socket
import binascii
import struct

# Initialize LoRa in LORAWAN mode.
lora = LoRa(mode=LoRa.LORAWAN)

# create an ABP authentication params
dev_addr = struct.unpack(">l", binascii.unhexlify('26011769'.replace(' ','')))[0]
nwk_swkey = binascii.unhexlify('E44A1E59045F3CDD81A2606491F626D1'.replace(' ',''))
app_swkey = binascii.unhexlify('85FFDD197900F1AD6D86F3E7DD9F46FC'.replace(' ',''))

# join a network using ABP (Activation By Personalization)
lora.join(activation=LoRa.ABP, auth=(dev_addr, nwk_swkey, app_swkey))

# create a LoRa socket
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)

# set the LoRaWAN data rate
s.setsockopt(socket.SOL_LORA, socket.SO_DR, 5)

# make the socket non-blocking
s.setblocking(False)

# send some data
s.send(bytes([0x01, 0x02, 0x03]))

# get any data received...
data = s.recv(64)
print(data)

boot.py is:

from machine import UART
import os
uart = UART(0, 115200)
os.dupterm(uart)

Running the code (either by resetting the PyCom, or by pressing the Run button in Pymakr) results in the following at the console:

Traceback (most recent call last):
  File "main.py", line 21, in <module>
OSError: [Errno 95] EOPNOTSUPP

Also from the console:

>>> os.uname()
(sysname='LoPy', nodename='LoPy', release='1.6.7.b1', version='v1.8.6-493-g99ac80fe on 2017-03-03', machine='LoPy with ESP32', lorawan='1.0.0')

We have 2 LoPy boards and the problem occurs with both.

Thanks.

[bbfnq]

@bucknall Hi - just wondered if you had had any success looking at this? Is there any more information I might provide to help?

[bucknall]

Hi @bbfnq! Apologies, I've been travelling without access to a LoPy the last couple of days - I did try it on the weekend at a hackathon I was at and there didn't seem to be any problems - I'll have a go at it when I'm back at the office tomorrow!

[FrenkieG]

Use spaces in your keys

[wteason]

I'm experiencing the same problem. Was there ever any resolution to this based on the OP?

[jmarcelino]

@wteason

SO_DR (datarate) 5 is only available in LoRa 868Mhz (EU868). Are you in a different region? For US915 it should be 3.

[wteason]

@jmarcelino Thanks for the quick reply. Yes, I'm in US915, and setting it to 3 does solve the issue. Now to figure out how to view what I'm sending from the LoPy to the mLinux Conduit gateway... :-/

[ksamuelson]

This post is deleted!