Hi Folks,

I've just decided to buy into this Arduino thing / Mysensors and so I bought a uno, and was trying to set the MQTT gateway up.

Firstly, I had the Blink program loaded as I hadn't yet overrided it (which I'm worried might have helped cause this) - and I hooked up Uno to a WizNET (W5100) Ethernet module.

I've since realized, that I followed the wiring diagram for the ENC28J60 Ethernet module, so I wired it up incorrectly - but not before trying to upload the MQTT sketch to the Uno - which failed with an error I unfortunately didn't keep to show you guys.

Since then the Uno won't work properly. When I plug it in to USB (and this is without the other parts connected) - the light blinks for the blink function (which says to me the sketch never uploaded correctly), but I can't get it to work properly over USB. The computer sometimes detects it, but it's always an unknown device now with the message "device descriptor request failed". I've tried reinstalling the drivers and everything.

I also have a Nano which I've tried to use to flash the bootloader to it, but no dice - I got this error: avrdude: stk500_recv(): programmer is not responding - now https://www.alexwhittemore.com/using-an-arduino-as-an-isp-programer-to-burn-the-arduino-bootloader/ this link suggests I can use a capacitor to fix that issue, but as yet I don't have any (they are on order).

So have I fried my Uno? And, perhaps more importantly (as I have another Uno en route) have I fried the Ethernet shield and/or radio?

If so, any tips for avoiding doing this in the future?

Thanks

Is a Nano better than a Pro Mini? I read it was more USB ready and easier to use, with the 3.3v and 5v being provided on the board pre-regulated and here in the UK it's actually cheaper than a Pro Mini.

Thanks

Hi Folks,

I'm new at this, but am getting ready to give it a go.

I'm a bit confused by the Ethernet/MQTT gateway - in the pictures there seems to be a breadboard but I can't see what's connected to it and for what reason, also as they both need 3.3, how do I give that voltage to both of them?

Also any particular Arduino best for a gateway? I saw someone was having trouble with a nano fitting the code in memory, am I best to get a Uno for this one?

Thanks,
Brett

Hi Folks,

New to mysensors and am impressed. I've been playing with OpenHAB and MQTT so this sounds like an interesting project. My question though, which might have been answered but I'm finding it hard to find the answer, is - is this bidirectional? As in if I had a 'sensor' on the Arduino network and that went over the radio network, hit the gateway and then got picked up by OpenHAB, could I then, if I had a 'actuator' or a 'do-er' node on the network, send a message to MQTT from OpenHAB to change the status of that actuator device? So for instance to start a motor controlling blinds for instance? Or is it a read only system?

Thanks