LoRa Communication between 2 lopys

[fb]

Hi all,

i am trynig to have a comm between 2 lopys using the LoRa.LORA mode.
I used this code :

server:

from network import LoRa
import socket

lora = LoRa(mode=LoRa.LORA)
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
mydata = s.recv(64)
print(mydata)

client:

from network import LoRa
import socket

lora = LoRa(mode=LoRa.LORA)
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
s.send(b'0123456789')

nothing happens...
I dont see anything transiting.
What am i doing wrong ?

Thx
François

[gump103]

Hi

I think its because you only listen once. you need to get the server constantly listening.

While (true):
mydata = s.recv(64)
print(mydata)

Then send the packet again.

Also not all packets make it to the server so posibly loop the "send as" as well with a:

time.sleep(2)

at the end of the loop.

James

[fb]

Thx for your answer.
So i did that :

Client :

from network import LoRa
import socket
import time

lora = LoRa(mode=LoRa.LORA)
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
s.setblocking(False)

while(True):
    s.send(b'0123456789')
    time.sleep(2)

Server :

from network import LoRa
import socket

lora = LoRa(mode=LoRa.LORA)
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
s.setblocking(False)

while(True):
    mydata = s.recv(64)
    if (len(mydata)>2):
        print(mydata)

Stil nothing is printed.
And my REPL is out because it seems overloaded. Is it normal ?

François

[fb]

My configuration :

import os; [os.uname().sysname, os.uname().machine, os.uname().release]
['LoPy', 'LoPy with ESP32', '0.9.5.b1']

[Roberto]

Hello @fb

here is a nice example on how t ouse 2 LoPys to connect them using LoRa.
https://forum.pycom.io/topic/236/lopy-nano-gateway

Hope this helps
Best,
Roberto

[fb]

Thanks !
I tried this but doesnt work for me !
Thats why i did something simpler.

[fb]

Thanks to Roberto, problem is solved.
Seems to be a pbm my boot.py

Bad one :

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

Good one :

import machine
import os
import time

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