Multitech conduit and Lopy "Not joined yet"

[MOnsteroz]

Hi guys,

I am new here and am looking for some help with connection of my Lopy. I have done a trial connection with a Multitech Mdot and it works fine but when i configure a Lopy OTAA I can see it listed on the conduit as a node but the Lopy continues to print "Not joined yet". any ideas??

<

import binascii
import pycom
import socket
import time
from network import LoRa
# Colors
off = 0x000000
red = 0xff0000
green = 0x00ff00
blue = 0x0000ff
# Turn off hearbeat LED
pycom.heartbeat(False)
# Initialize LoRaWAN radio
# lora = LoRa(mode=LoRa.LORAWAN)
# Initialize LoRa in LORAWAN mode.
# Please pick the region that matches where you are using the device:
# Asia = LoRa.AS923
# Australia = LoRa.AU915
# Europe = LoRa.EU868
# United States = LoRa.US915
lora = LoRa(mode=LoRa.LORAWAN, region=LoRa.AU915)
# create an ABP authentication params
# dev_addr = struct.unpack(">l", binascii.unhexlify('00 00 00 05'.replace(' ','')))[0]
# Set network keys
app_eui = binascii.unhexlify('1122334455667788')
app_key = binascii.unhexlify('11112222333344445555666677778888')
# Join the network
#lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=600)
lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=0)
pycom.rgbled(green) # green
# Loop until joined
while not lora.has_joined():
    print('Not joined yet...')
    pycom.rgbled(off)
    time.sleep(0.1)
    pycom.rgbled(red)
    time.sleep(2)

print('Joined')
pycom.rgbled(blue)

s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
s.setsockopt(socket.SOL_LORA, socket.SO_DR, 5)
s.setblocking(True)

i = 0
while True:
    count = s.send(bytes([i % 256]))
    print('Sent %s bytes' % count)
    pycom.rgbled(green)
    time.sleep(0.1)
    pycom.rgbled(blue)
    time.sleep(9.9)
    i += 1
>

[jcaron]

@monsteroz please edit your post and add ``` on a line before and after your code so it’s properly formatted.

[robert-hh]

@monsteroz May I assume that you registered your application and device beforehand and inserted the proper app_eui and app_key in the script?
I have a FiPy here that joins properly. The join statement is:

lora.join(activation=LoRa.OTAA, auth=(dev_eui, app_eui, app_key), timeout=0, dr=config.LORA_NODE_DR)

But the difference are default values.

[MOnsteroz]

@robert-hh The values in the script are correct as this is just a testbed to get things working. I did not use the Dev_eui as I read it will use a default address. What does the " dr=config.LORA_NODE_DR) " do?

Cheers

Sean

[MOnsteroz]

@jcaron someone fixed it for me ????

[MOnsteroz]

@robert-hh

Hi this is the config and the history

[robert-hh]

@monsteroz said in Multitech conduit and Lopy "Not joined yet":

What does the " dr=config.LORA_NODE_DR)

It sets the data rate, and in my example it is set to 5.

[MOnsteroz]

@robert-hh Thanks Robert. I am still getting my head around Lora :)

[robert-hh]

@monsteroz I do not understand all the settings, but some comments.

• The xxPy software has problems with the RX2 window, so always the RX1 should be used.
• The OTAA join delay is 5 seconds.

[robert-hh]

@monsteroz said in Multitech conduit and Lopy "Not joined yet":

I am still getting my head around Lora :)

I'm still at the beginning too, starting with LoRa a few weeks ago.

[jcaron]

@robert-hh Never had an issue with RX2 on the receiving side. What kind of issue are you seeing?

[robert-hh]

@jcaron There were complaint about the in another thread.

[jmarcelino]

@monsteroz
Ok some problems...

In the AU915 region need to restrict the LoPy to what your gateway is set to:
Frequency Sub-Band 4

Because as configured the LoPy expects to use all valid 72 channels. However most real world gateways are limited to only 8 channels, hence the full channel map is partitioned into subbands.

So add a function like this

def select_subband_au915(lora, subband):
    if (type(subband) is int):
        if ((subband<1) or (subband>8)):
            raise ValueError("subband out of range (1-8)")
    else:
        raise TypeError("subband must be 1-8")
    
    for channel in range(0, 64):
        lora.remove_channel(channel)
    
    for channel in range((subband-1)*8, ((subband-1)*8)+8):
        lora.add_channel(channel, frequency=915200000+channel*200000, dr_min=0, dr_max=5)

the call select_subband_au915(lora, 4) to remove all channels which don't belong to sub-band 4 after initialising your LoRa object (and before joining)

[MOnsteroz]

@jcaron
The Lopy and Lopy4 just does not exit the loop and says "not joined yet."

[MOnsteroz]

@jmarcelino Hi,

If I lock it to sub band 4 it seems to just hang

# Europe = LoRa.EU868
# United States = LoRa.US915
lora = LoRa(mode=LoRa.LORAWAN, region=LoRa.AU915)
select_subband_au915(lora, 4)
# create an ABP authentication params

If I add the below I get the same 'Not joined yet" message

lora = LoRa(mode=LoRa.LORAWAN, region=LoRa.AU915)
def select_subband_au915(lora, subband):
    if (type(subband) is int):
        if ((subband<1) or (subband>8)):
            raise ValueError("subband out of range (1-8)")
    else:
        raise TypeError("subband must be 1-8")
    
    for channel in range(0, 64):
        lora.remove_channel(channel)
    
    for channel in range((subband-1)*8, ((subband-1)*8)+8):
        lora.add_channel(channel, frequency=915200000+channel*200000, dr_min=0, dr_max=5)
select_subband_au915(lora, 4)
# create an ABP authentication params
app_eui = binascii.unhexlify('1122334455667788')
app_key = binascii.unhexlify('11112222333344445555666677778888')
# Join the network
#lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=600)
lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=0)

[jmarcelino]

Thanks @monsteroz

I'm not an expert on Multitech but I think your "Join Delay" isn't according to the specification.

That should be 5 (seconds) as Robert already pointed out. Did you change it already?

Do keep the sub channel selection code. That's also necessary, but not sufficient.

[MOnsteroz]

@jmarcelino

I did not change the Join Delay but I have now changed it to 5 seconds with no change

thanks

Sean

[MOnsteroz]

Hi guys,

I reset to factory setting on the conduit and just added ID nd Key .. still no luck with the lopy..

Sean

[jmarcelino]

@monsteroz
Can you post what are you current gateway settings please?

[MOnsteroz]

@jmarcelino

Hi I have been changing settings to try and make it work but here is what it is at the moment. I have changed to FSB 2 in case I want to use the TTN in the future.

Cheers

Sean