"Choose the Serial Port" error with MySensors and RFXtrx433?

[Aron Sjöberg]

I think I have another powered hub laying around! Will try when I get home from work. I can check the 1usb-folder as well.

[Magnus]

@Aron-Sjöberg Did you solve your problem? I have a mysensors serial gateway, a rfxtrx433e and a USB stick connected to my Vera (Edge) through an externally powered USB hub (plexgear). They all work just fine.

[miro]

@Magnus

Do you have this one?

https://www.kjell.com/se/sortiment/dator-natverk/datortillbehor/usb-tillbehor/usb-hubbar/plexgear-usb-hubb-4-vags-med-stromforsorjning-p68296

I don`t have a second hub to try with so I need to buy a new one...

[Magnus]

@miro
I've got this one
https://www.kjell.com/se/sortiment/dator-natverk/datortillbehor/usb-tillbehor/usb-hubbar/plexgear-usb-3-0-hubb-4-vags-p61062

It's been up running for a year now.

[Aron Sjöberg]

No, still have the same issue with port conflict with the RFXtrx... :(

I'm going to try another hub and build the serial gateway again.

[Aron Sjöberg]

Argh!

I finally received my new USB-hub and tried a new serial gateway I built.

I STILL get the same error. I can't seem to have both my RFXtrx433E and the MySensor gateway connected (and working) at the same time.

@Magnus, could you post a screenshot of your settings in Vera Edge?

[miro]

I bought this one: https://www.kjell.com/se/sortiment/dator-natverk/datortillbehor/usb-tillbehor/usb-hubbar/plexgear-usb-hubb-7-vags-med-stromforsorjning-p68616

Now all is working fine for me.

[Magnus]

@Aron-Sjöberg
My config below:

[BartE]

@Magnus just a wild guess.

Did you try to compile the MySensors GW with baudrate set to 38400 so they both use the same baudrate?

[Aron Sjöberg]

@BartE Hmm... I didn't know you could choose the baudrate? I just followed the instructions on the website (https://www.mysensors.org/build/serial_gateway) but when I check the code I can clearly read that there is something in the sketch about the baud rate:

// Define a lower baud rate for Arduino's running on 8 MHz (Arduino Pro Mini 3.3V & SenseBender)
#if F_CPU == 8000000L
#define MY_BAUD_RATE 38400
#endif

However, I use the recommended Arduino Nano for my Vera Serial Gateway, not Arduino Pro Mini 3.3V or SenseBender.

How would I change the baud rate for the MySensor gateway if I can't use 38400 because it is used by my RFXtrx433E?

[Aron Sjöberg]

@Magnus Thank you for your trouble! Did you photoshop your screenshot or can you configure two different serial port devices at the same time? I only have one instance I can change settings for?

Otherwise my settings seems to be the same as yours.

[BartE]

@Aron-Sjöberg said in "Choose the Serial Port" error with MySensors and RFXtrx433?:

Add this line

#define MY_BAUD_RATE 38400

above the #include <SPI.h>

[miro]

@Aron-Sjöberg

Have you restart luup after you connected both usb-ports?

[Magnus]

@Aron-Sjöberg I can configure both ports at the same time. It looks exactly as in the posted picture.

@BartE I justfollowed the instructions on the website. This was probably a year ago and the code used for the serial GW was designed only for Arduino Nano 328p / 16MHz.

[Aron Sjöberg]

Thank you for your help!

Unfortunately nothing works. I have even tried to change the radio module from RFM69 to NRF24L01 to make sure it wasn't the connections that was badly soldered.

@Magnus Could you please post the sketch you use for your gateway? I tried to add #define MY_BAUD_RATE 38400 as @BartE suggested but this doesn't seem to make a difference.

I'm starting to think there is something wrong on Veras end. I don't get two different devices under the Serial Port configuration like @Magnus. You also have different ports (3482 for the serial gateway and 3481 for the RFXtrx).

As a last resort I guess I could install Domoticz on a RPi and import the devices to the Vera as virtual devices, but this seems like a hassle if it is possible for the gateway to work directly.

[korttoma]

Have you ever confirmed that the MySensors USB gateway works without the RFXtrx attached? Or checked that you really have an FTDI chip on the MySensors USB gateway? This is the only chip that the Vera can detect out of the box. A complete reboot of your Vera might also help.

[Aron Sjöberg]

I'm using a Arduino Nano. How do I check if it is a genuine FTDI chip?

[korttoma]

@Aron-Sjöberg the FTDI chip is on the under side of Arduino nanos and clearly sais FTDI. Please post pictures of your devise if your uncertain. I don't know if fake or real maters when used on Vera.

[Aron Sjöberg]

@korttoma said in "Choose the Serial Port" error with MySensors and RFXtrx433?:

Arduino nanos

It's a bit hard to read but the black chips on the back says:

A106

and

WCH
CH340G
202686635

and

AMS1117
5.0 DN628

on the front (where the button is)

ALMEL
MEGA328P
AU 1639

I can't find any mention of "FTDI". Should I assume it is not a genuine Arduino nano?

I DO have an unused Arduino Uno laying around. Maybe it would be easier to buy a ethernet shield and use a ethernet gateway instead of the serial gateway? Is it a W5100 ethernet shield I would need for the Uno?

[Magnus]

@Aron-Sjöberg I would guess the problems are due to the CH340G chip (instead of an FTDI chip). I use this nano for my gateway:
https://www.aliexpress.com/item/Nano-V3-0-Mini-USB-ATmega328-5V-16M-100-ORIGINAL-FTDI-FT232RL/32338360936.html?spm=2114.13010608.0.0.ZU4WHD