Raw LoRa questions

[robert-hh]

@szyba91 I tried the code form the documentation on two LoPy4, on two FiPy and a FiPy/loPy combination, and all worked fine.
You have to be sure that the code is really started. If it is running and does not receive anything, it will still print lines of:
b''
indicating a timeout.

[robert-hh]

@szyba91 Just a note: After you have uploaded the code, you must perform a hard reset of the device - push the reset button. Otherwise the LoRa chip will not work.
P.S.: I upvoted a few of your comments, such that you can reply faster on the board.

[szyba91]

@robert-hh Thank you. Maybe I'm doing the wrong think that is so silly that we've missed. Lets switch back to code form PyCom documentaton. Scrren shoot of my VS Code ( I removed comments just to see more from terminals output:

I can't even see the b' ' it seams that the radio is inactive ?

[robert-hh]

@szyba91 I think vscode and the pycom plugin is the culprit. Better upload the script to the device using ftp (e.g. filezilla) and use a simple terminal emulator. You already called it mian.py, to avoid name clash. Once the device is uploaded and the terminal is active, push reset, and then, at the REPL prompt enter
import mian.
At the stand-alone device the script should be called main.py, or you add the statement ' import mian' to main.py, to ensure automatic start after boot.

[szyba91]

@robert-hh I will try to use this filezilla. Mabye today eavning (i had to go unfortunatally).
Just te be sure: Is my file structure in VS Code correct? As for main.py I've done (i think) exactly what PyCom seas in manual.
How do we understand stand-alone device. I've just created the mian.py with this folder.
I'm now confused becouse I use the same method for fimple programs like RGB led and i worked.
Could you provide same detailed information ?

[robert-hh]

@szyba91 I cannot judge the file structure in VSCode. Ido not use that program. The file structure on the Lopy should be:
/flash
/flash/cert
/flash/lib
/flash/sys
/flash/boot.py
/flash/main.py
/flash/other_files_and_dirs_of_yours
....

[szyba91]

@robert-hh Hello again, i was absence for a few days. I'm trying to set FTP serever like you siad but I've first obsticle.

To set FTP server first i have to connect to WLAN (WiFi) right? To do so i have to upload this example code using my router SSID etc.

https://docs.pycom.io/chapter/tutorials/all/wlan.html

So to use what you sid about FTP I have to use VSCode first to upload first code ?

[robert-hh]

@szyba91 You have to edit the script and insert the SSID and Password of your access point. Alternatively, since the xxPy device creates an access point itself, you can connect your computer to that access point. The default IP address is 192.168.4.1^, some info is at https://docs.pycom.io/chapter/gettingstarted/programming/FTP.html

[szyba91]

@robert-hh Ok. I've created folder with file main.py In This file I have below code:
nets = wlan.scan()
for net in nets:
if net.ssid == 'mywifi':
print('Network found!')
wlan.connect(net.ssid, auth=(net.sec, 'mywifikey'), timeout=5000)
while not wlan.isconnected():
machine.idle() # save power while waiting
print('WLAN connection succeeded!')
break

I'm uploding this using VSCode but nothing happens. Now i came up with some idea. The same think i had with LoRa Raw, I've putted the code into main.py.
Maybe I have to create diferent file structre with boot? The examples from pycom docuentation are not so detaild.

[robert-hh]

@szyba91 You do not have to scan for a network, if you know if it exists. Just add something like the below to your main.py file:

import machine
from network import WLAN
wlan = WLAN(mode=WLAN.STA) # Set WLAN to STA mode

if not wlan.isconnected():
    # change the line below to match your network ssid, security and password
    wlan.connect('mywifi', auth=(WLAN.WPA2, 'mywifikey'), timeout=5000)
    while not wlan.isconnected():
        print(".", end="")
        machine.sleep(1)

Edit: I do not know about folder structures within VSC, Atom or any other bloatware and bug hiders like that. I prefer to use simple tools where I know what I'm doing and what is happening.

[johncaipa]

Hello everyone, a question regarding this issue, I would like to know if someone has tried to connect a Lopy with raw Lora to a Multitech Conduit gateway as it comes from the factory or would they not be compatible?