Nothing received

[vifra]

Hi all,
My system works for more than 1 year.
And suddently this morning, no "wake up", no data transmitted

I've checked cable management, all is ok

What "CMT2300A Statut | non configurée" means

thanks

[stefan123t]

@vifra Virginie the CMT2300A is the RF chip that wireless connects the OpenDTU to your HMS/HMT inverters. If it is not configured most likely the GPIO3 Pin on the Chip/Module and your ESP32 is somehow unconnected.
Orher than that you may want to backup and compare / verify your pin_mapping.json to your setup / wiring.

[vifra]

In fact, I don't need CMT2300A, because, my panels are HM-xxx (I need NRF24L01+, and it' ok)
CMT is only for HMS-xxx, right ?

So, I don't understand why I can't have any data...
In console, i've got :

14:44:09.734 > Nothing received, resend whole request
14:44:09.734 > TX AlarmData Channel: 75 --> 15 90 68 62 82 80 12 18 20 80 11 00 67 1F 95 23 00 00 00 00 00 00 00 00 D3 30 1B
14:44:10.528 > RX Period End
14:44:10.528 > All missing

[schneeer]

Hi.
Can you test the DTU on another inverter?
Does the inverter itself still work?
I think I read here that the NRF24L01+ module also tends to break.

[vifra]

Hi,
And thanks.
Everything works well because I still have the box DTU from Hoymiles (and both are in the same place for a long time).
If I remove a cable from NRF24L01, I've got a message "Could not connect to a configured radio module. Please check the wiring."
For now, I can't test anything (night).
Tomorrow, I will try to put my DTU closer to the panels (I've already tried, but in the same room)

[vifra]

Hi,
I turn on this morning in the same place, same power, same wire/cable : it's OK
Just add a capacitor (10µF) in case...
Don't understand what appened

[schneeer]

If I'm not mistaken, there are current spikes when the radio module sends and receives data. A capacitor on the operating voltage near the radio module can be very helpful here.
Furthermore, the radio module may be “aged” and therefore slightly defective.
Replacing the power supply can also help. The power supply should have at least 1000mA and should not be inferior.

[vifra]

Thanks for theses advices !