Cellular LoRaWAN Nanogateway

[mylescai]

Hey, does anyone know if it's possible edit the lorawan nanogateway code so that the device is connected via cellular (Cat M1) rather than wifi?

[lewis]

I was able to get it work just fine. The internet connection to the server worked fine. I'm having issues getting downlink messages to the lorawan nodes, but on AT&T LTE-M its working great.

[robert-hh]

@mylescai the nanogateway opens a socket connection to the TTN server. So you just have to attach and connect the LTE link, and the go on with connecting to TTN.

Edit: To be more specific. In nanogateway.py, function start(), at about line 140 the wifi is set up. At that place you can instead set up the LTE connection.

[Miguel Toscano G]

@robert-hh said in Cellular LoRaWAN Nanogateway:

et up the LTE connection.

Hi Robert, help me please =D, ¿How can I instead set up the LTE connection ?

[Miguel Toscano G]

@robert-hh
I changed config.py code for these:

from network import LTE
import time
import socket

lte = LTE()
lte.init()

lte.attach(band=20, apn="internet.itelcel.com")
print("attaching..",end='')
while not lte.isattached()
time.delay(0.25)

print('.',end='')
print(lte.send_at_cmd('AT!="fsm"'))

print("attached!")

lte.connect()
print("connecting [##",end='')
while not lte.isconnected():
time.sleep(0.25)
print('#',end='')
#print(lte.send_at_cmd('AT!="showphy"'))
print(lte.send_at_cmd('AT!="fsm"'))
print("] connected!")

print(socket.getaddrinfo('pycom.io', 80))
lte.deinit()
#now we can safely machine.deepsleep()

---

and now i know, I have to change this into nanogateway.py.... ¿but how ?

self.wlan = WLAN(mode=WLAN.STA)
self._connect_to_wifi()

---

[robert-hh]

@Miguel-Toscano-G All you have to do is start LTE and connect to the network. Once you have done that, you can run the nanogateway code as it is. I just tried that here with NB-IoT.
For connecting to the LTE service, follow the examples.

[Miguel Toscano G]

@robert-hh Hi Robert, thank you for help me, I tried with the example "nanogateway" code with WiFi and its work good, but when I changed the config file with de LTE code. I get this IndentationError.

----------- Console--------------
OK
attached!
connecting [##] connected!
[(2, 1, 0, '', ('18.195.176.111', 80))]
Traceback (most recent call last):
File "main.py", line 14, in <module>
File "nanogateway.py", line 99
IndentationError: unexpected indent
Pycom MicroPython 1.20.2.rc6 [v1.11-01f49f7] on 2020-02-28; FiPy with ESP32
Pybytes Version: 1.3.1
Type "help()" for more information.

---

File nanogateway.py
line 99 refers to ssid y password

           99        self.ssid = ssid
           100        self.password = password

*** the main and nanogatawey files, I did not modify them. Only to the file "config", I delete all the wifi code, and paste the lte configuration, and also, I put the information telephone company.

[robert-hh]

@Miguel-Toscano-G Obviously the file is formatted wrong. Did you really copy the line numbers? If not, there is probably a mix of tabs and spaces in the file, which may be causes by the process of copying and storing.

[Miguel Toscano G]

@robert-hh you are correct, that was the error =D

[Miguel Toscano G]

@robert-hh Finally it is running on LTE cat m1 =D thanks... ¿Do you know, how can i use lte cat m1 and wifi on the same gateway at the same time? I want to connect my fipy with ttn using LTE CAT M1(its ready) and connect the same gateway with a laptop through wifi....

[robert-hh]

@Miguel-Toscano-G There was a discussion about simultaneous WiFi and LTE mode at the forum. As far as I recall the result, there was no clear control about which interface is used by the gateway for it's communication.
Do you use the FiPy in AP or STA mode?

[Miguel Toscano G]

@robert-hh So far, I have used the fipy connected to wify and I have also used the fipy with lte. I'm not sure what I'm using (Ap or STA).... but I only use one technology at a time (wifi or lte)

wifi code (config.py)
"""LoPy LoRaWAN Nano Gateway configuration options"""

import machine
import ubinascii

WIFI_MAC = ubinascii.hexlify(machine.unique_id()).upper()
GATEWAY_ID = GATEWAY_ID = WIFI_MAC[:6] + "FFFE" + WIFI_MAC[6:12]

SERVER = 'router.us.thethings.network'
PORT = 1700
NTP = "pool.ntp.org"
NTP_PERIOD_S = 3600

WIFI_SSID = ''
WIFI_PASS = ''

LORA_FREQUENCY = 903900000
LORA_GW_DR = "SF10BW125" # DR_0
LORA_NODE_DR = 0

LTE code (config.py)

""" LoPy LoRaWAN Nano Gateway configuration options """

import machine
import ubinascii

WIFI_MAC = ubinascii.hexlify(machine.unique_id()).upper()

Set the Gateway ID to be the first 3 bytes of MAC address + 'FFFE' + last 3 bytes of MAC address

GATEWAY_ID = WIFI_MAC[:6] + "FFFE" + WIFI_MAC[6:12]

SERVER = 'router.us.thethings.network'
PORT = 1700

NTP = "pool.ntp.org"
NTP_PERIOD_S = 3600

for US915

LORA_FREQUENCY = 903900000
LORA_GW_DR = "SF10BW125" # DR_0
LORA_NODE_DR = 0