joining OTAA and then sending location data

[abhishek2101]

Hi

I have been able to join my lop4 to TTN using OTAA manually.

Now i want to upload the main.py to the board so that when it boots, it should be able to connect to the TTN automatically and then send the pytrack location data. How can i accomplish this ?

[robert-hh]

@abhishek2101 FTP. See the related section in the manual.
https://docs.pycom.io/gettingstarted/programming/ftp

[abhishek2101]

@robert-hh i was able to upload main.py but it does not run automatically after i disconnect and reconnect the module. Am i missing something ?

[dan]

@abhishek2101 Hi! Do you have anything in your boot.py? Do you have anything connected to it? Is the LED heartbeat flashing?

[abhishek2101]

@dan nothing in boot.py. lopy4 is mounted on the pytrack and powered by USB. LED heartbeat was flashing until I uploaded the below main.py code to the board.

from network import LoRa
import socket
import time
import ubinascii
​
# Initialise 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.IN865)
​
# create an OTAA authentication parameters
app_eui = ubinascii.unhexlify('xxxxxxxxxxxxx')
app_key = ubinascii.unhexlify('xxxxxxxxxxxxxxxxx')
​
# join a network using OTAA (Over the Air Activation)
lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=0)
​
# wait until the module has joined the network
while not lora.has_joined():
    time.sleep(2.5)
    print('Not yet joined...')
​
# 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 blocking
# (waits for the data to be sent and for the 2 receive windows to expire)
s.setblocking(True)
​
# send some data
s.send(bytes([0x01, 0x02, 0x03]))
​
# make the socket non-blocking
# (because if there's no data received it will block forever...)
s.setblocking(False)
​
# get any data received (if any...)
data = s.recv(64)
print(data)```
​

[dan]

@abhishek2101 You're using an invalid region in Line 12. Apart from that, the code should work (tested it) and the heartbeat is should be blinking as well. Could you change the region and try again? You can find the available options here.

[robert-hh]

@abhishek2101 About region IN865. Dou you use the standard firmware form Pycom or the IN865 package which I had assembled. Only in the latter case, IN865 is supported.

[abhishek2101]

@robert-hh I am using the package you made.

[robert-hh]

@abhishek2101 when using ftp, did you send the main.py to /flash/main.py on the device?
Also, using the package I made, there is an simple files editor embedded, which you can call from the REPL prompt in a terminal window like Putty or Picocom or screen. And some file tools too.
For the editor, enter:

from pye import pye
pye("main.py")

Documentations is at https://github.com/robert-hh/Micropython-Editor
For the file tools, enter:

from upysh enter *

then you have something like ls, cat, .. at the REPL prompt, and a man command for an overview of all supported commands.

[abhishek2101]

@robert-hh I am using the upload feature of pymakr plugin in atom to upload the main.py file. After this when I ftp into the board I can see main.py inside the flash directory.

[robert-hh]

@abhishek2101 There is always a main.py. The question is, whether it is the right one. You could try to give your file a different name, like otaa_test.py, and start it form the REPL prompt with:
import otaa_test
Thatis anyhow the preferred method - putting you own logic in separate files and start that from main.py with import xxxxx

[abhishek2101]

@robert-hh i have put the following code in mylora.py and uploaded the same to the board using pymakr plugin for atom. When I upload I see a directory structure created (image attached) under flash directory. Now, if I want this code to run everytime the module is powered on what should I do ?

from network import LoRa
import socket
import time
import ubinascii
​
# Initialise 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.IN865)
​
# create an OTAA authentication parameters
app_eui = ubinascii.unhexlify('xxxxxxxx')
app_key = ubinascii.unhexlify('xxxxxxxxxx')
​
# join a network using OTAA (Over the Air Activation)
lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=0)
​
# wait until the module has joined the network
while not lora.has_joined():
    time.sleep(2.5)
    print('Not yet joined...')
​
# 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 blocking
# (waits for the data to be sent and for the 2 receive windows to expire)
s.setblocking(True)
​
# send some data
s.send(bytes([0x01, 0x02, 0x03]))
​
# make the socket non-blocking
# (because if there's no data received it will block forever...)
s.setblocking(False)
​
# get any data received (if any...)
data = s.recv(64)
print(data)

[robert-hh]

@abhishek2101 Add a statement:
import mylora
to main.py

[abhishek2101]

@robert-hh unfortunately, that is not working for me.

[robert-hh]

@abhishek2101 Does it work, if you call:
import mylora
from the REPL prompt?
if yes, and this statement is inside main.py, do not reset from pymakr, instead push the reset button on the Lopy4.
Pymakr may do a safe boot, which prevents boot.py and main.py from running.
Using my firmware package, you can check the content of main.py and boot.py from the REPL command line by:

from upysh import *
cat("main.py")
cat("boot.py")

[robert-hh]

@abhishek2101 You can also look into files using Chrome or the linux file manager, by connecting to:
ftp://<lopy_ip_address>
e.g.
ftp://192.168.4.1

[abhishek2101]

@robert-hh it does not work from REPL prompt also. I have also tried reseting from the button.
screenshot attached.

[robert-hh]

@abhishek2101 What I see:
main.py starts and calls mylora.py, and that runs into an error at line 5. So check your script.

[abhishek2101]

@robert-hh here is the code, dont see any problem with line 5

the same code when i run (using pymakr plugin in atom) without uploading is able to run and join the TTN.

from network import LoRa
import socket
import time
import ubinascii
​
# Initialise 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.IN865)
​
# create an OTAA authentication parameters
app_eui = ubinascii.unhexlify('xxxxxxx')
app_key = ubinascii.unhexlify('xxxxxxx')
​
# join a network using OTAA (Over the Air Activation)
lora.join(activation=LoRa.OTAA, auth=(app_eui, app_key), timeout=0)
​
# wait until the module has joined the network
while not lora.has_joined():
    time.sleep(2.5)
    print('Not yet joined...')
​
# 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 blocking
# (waits for the data to be sent and for the 2 receive windows to expire)
s.setblocking(True)
​
# send some data
s.send(bytes([0x01, 0x02, 0x03]))
​
# make the socket non-blocking
# (because if there's no data received it will block forever...)
s.setblocking(False)
​
# get any data received (if any...)
data = s.recv(64)
print(data)```

[robert-hh]

@abhishek2101 There is a difference. When you run the code from pymakr, it is freshly uploaded. If you call it from main.py fro in the terminal window of pymakr, you run the local copy on the device.
What happens, if in the REPL prompt, you enter the command:
import mylora