LOM204 (WISOL)

[tcpipchip]

Hi,
Soon good news to WISOL USERS using your LIBRARIES :)

[tcpipchip]

Datasheet_LOM204A_V0.1_20190715.pdf
Attached datasheet
Have you a good ABP AT seguence to me to follow and give a feedback ?

[janakj]

Does it need to be ABP? The easiest way to check if the module is working is with an OTAA Join.

[tcpipchip]

ok, i will do first!

[janakj]

First configure your region:
AT+BAND=n

Enable OTAA mode:
AT+MODE=1

The modem uses the public network preamble by default. If your network uses the private preamble, switch it with AT+NWK.

Configure the device on the network server. Select LoRaWAN 1.0.4, RP2-1.0.3, OTAA mode. Use the default key (2B7E151628AED2A6ABF7158809CF4F3C) for all keys.

Send an OTAA Join:
AT+JOIN
If you get +EVENT=1,1, the device joined successfully. If you get +EVENT=1,0, the Join didn't work. It can take up to two minutes to get the event.

[tcpipchip]

Boot :)

[tcpipchip]

getting success on join
See at end of blog
https://lom204-cli-wisol.blogspot.com/2022/10/wisol-lom204-mais-uma-opcao-de-comandos.html
Now tryng to send a package, not reach the server

[tcpipchip]

got some success with
AT+PCTX 1,5\rhello

but not with
AT+PUTX

[janakj]

Your uplinks seem to require too many retransmissions (+EVENT=2,2). This could be due to poor RF conditions, incorrect channel mask, or some other problem with the modem.

[tcpipchip]

Your uplinks seem to require too many retransmissions (+EVENT=2,2). This could be due to poor RF conditions, incorrect channel mask, or some other problem with the modem.

i changed now to 1.0.4 specification...
Continuing the tests!

[tcpipchip]

getting progress!

[tcpipchip]

looks that sometime i have to send
AT+CHMASK=00FF00000000000000
before
AT+PCTX 1,5\rhello
or
AT+PUTX 1,5\rhello
when i get from them
+EVENT=2,2
+EVENT=2,2
+EVENT=2,2

Then works perfectly :(

[janakj]

In OTAA mode, the channel mask should have been set by the network server in Join response. In ABP mode, you may need to configure it yourself after device factory reset or band change.

[tcpipchip]

In OTAA mode, the channel mask should have been set by the network server in Join response. In ABP mode, you may need to configure it yourself after device factory reset or band change.

AT+CHMASK=00FF00000000000000
will choose the channels 8 to 15, right ?

[janakj]

Yes, the above channel mask selects channels 8 through 15.

[tcpipchip]

Yes, the above channel mask selects channels 8 through 15.

good!

[tcpipchip]

btw, your document is very very complete!

Plans to embedded a Script Language into module to be OPENCPU ?

[janakj]

No plans to add scripting to the modem itself. There is a Python management tool that communicates with the modem via the AT command interface.

[tcpipchip]

ok!
Wich is the difference between AT+ and AT$ commands ?

[janakj]

From https://github.com/hardwario/lora-modem-abz/wiki/AT-Command-Interface:

The modem implements two sets of AT commands. The commands that start with the prefix AT+ are designed to be compatible with the AT commands implemented by the Murata Modem firmware in the Type ABZ-93 line of modules. The commands that start with the prefix AT$ are custom extension AT commands designed specifically for this firmware. The extension commands generally provide additional functionality not found in the AT+ set.

[tcpipchip]

wow, nice!

[tcpipchip]

One more question, this source if open-source, right ?
Then i can port to other modules too ?

[janakj]

Yes, it's open source and free.

[tcpipchip]

btw, i have plans to use you github to use in classroom in IoT, i am a teacher

Did you see the blog ?

[janakj]

Unfortunately, I don't speak Portuguese, sorry.

[tcpipchip]

looks that
AT+CHMASK=00FF00000000000000
is not storing in EEPROM...
because is backing to FFFFFF....without factory reset

[janakj]

The channel mask setting is stored in EEPROM. It reverts to the default value when you switch band. Also, the network server can change the value remotely, depending on how you have the network server configured.

[tcpipchip]

The channel mask setting is stored in EEPROM. It reverts to the default value when you switch band. Also, the network server can change the value remotely, depending on how you have the network server configured.

thank you @janakj

[tcpipchip]

hi
May i give a suggestion to use your lib as opencpu ?
Maybe is a easy for you to do...

[janakj]

What does opencpu mean?

[tcpipchip]

hi
means that the user can put inside his Application, to not need a host
for example
My idea is to have a C function that simulate a AT comand received to UART

send_at_cmd("AT+")
and
receive_at_answer()

[janakj]

The firmware is open source. You can put anything you want in there and build your own binary.

[tcpipchip]

nice!

[tcpipchip]

i modifyng the code to make AT avaliable into the processor, without a HOST
what do you think about we add this feature ?

[janakj]

I am not sure I understand what you mean. Maybe you could rephrase or provide some examples?

[tcpipchip]

look
enqueue((unsigned char *)"AT+VER?\r\n",9);
HAL_Delay(3000);
It´s working, i can send an AT COMMAND without a HOST

My ideia is to continue, now reading the AT COMMAND answer without HOST

My opnion, it´s a big feature to add to make your LIB opencpu :)

What do you think ?

[janakj]

What would be the use case for this feature?

[tcpipchip]

mainly reduce hardware cost!

[janakj]

If you are trying to use the Type ABZ module as a standalone device, e.g., a sensor, then that's certainly possible, but you don't need to use the AT command interface from within the modem software itself. The AT command interface only makes sense when you need to communicate with the modem via a UART.

In your scenario, simply connect the sensor to a GPIO, access it through the STM32 HAL, and invoke LoRaMac-node functions directly, using the functions in src/cmd.c and src/lrw.c as an example.

[tcpipchip]

ok

[tcpipchip]

Can you provide a simple example as OPENCPU that only send a AT+VER? and get the results ?

By the way, here the blog

https://lom204-cli-wisol.blogspot.com/2022/10/wisol-lom204-mais-uma-opcao-de-comandos.html

[tcpipchip]

hi again :)
Can you provide a simple example as OPENCPU ?
i have plans to insert on BLOG