Lopy lora mode no trasmit

[james]

I bought recently lopy OEM, I'm doing some tests with lora but it does not seem to work.
I came up with many examples of official documentation.

I connected vdd33, gnd, rst, P0 (RX), P1 (TX)

The modules communicate with the serial and i can program them and I also successfully tried wifi and bluetooth.

"uname" modules updated to the latest version via your software:
(Sysname = 'Lopy', nodename = 'Lopy', release = '1.7.1.b2', version = 'v1.8.6-642-g84447452 on 3.6.2017', machine = 'Lopy with E
SP32 ', lorawan =' 1.0.0 ')

Frequency lora 868, tested in various configurations bandwidth, coding rate and spread factor

Do you have any idea ???
Regards
Giacomo

[james]

No idea????
Please

Regards

[bucknall]

Hi @james,

Do you have an antenna connected to the OEM module?

Thanks,

Alex

[james]

@bucknall
A 1/4 wave antenna
It may cause problems, it requires a specific one.
thank you

regards

[bucknall]

If you can, please send me a picture of how you have the module connected. I might be able to assist you with the problem.

Thanks,

Alex

[james]

@bucknall
Attached to the post some of the photos
thank you

regards

excuse for my easy english

[james]

You can send me an example of the minimum and how to link lopy oem to make it work properly
thank you
regards

[james]

@bucknall
Also below is the link schema
thank you

regards

[jmarcelino]

@james
From the photo I think you connected GND next to RESET and not the one next to 1V8 as in your schematic

Try adding more direct ground connections especially on the LoRa side.

Also can you explain how you're testing LoRa?

[james]

@jmarcelino
I have practically tested the various examples on the documentation, lopy to lopy and lora nano gateway with a node.

Trying the various 868 and I frequencies with various sf / cr / bw parameters configurations ...

I do some testing with the hw by connecting the various gnds because I tested spi with the oscilloscope and the signal there.

Let me know how the tests go.

thank you
Regards

Excuse for my easy english

[james]

@james said in Lopy lora mode no trasmit:

You can send me an example of the minimum and how to link lopy oem to make it work properly
thank you
regards

HARDWARE CONNECTION LOPY L01 OEM
please

We did a lot of hardware and software tests, we have not been able to solve the problem again !!!
thank's
regards

Attached diagram with all connected GNDs

[james]

Today,
With the release of "1.7.3.b1" version lora seems to communicate on OEM L01 modules after much hardware and software testing ......

regards