Hurm strange things are happening here ...
did some googeling
most reasonable result: sketch is too big and conflicts with bootloader
tried to reburn bootloader via usbtinyisp and arduino software
can't upload anything to the arduino:
avrdude: stk500_recv(): programmer is not responding
Oh NO, Not again!
got certainty, that this error results from "corrupt" bootloader (I already "lost" an uno with this problem)
tried to burn the bootloader via avrdude:
I used the config file from th arduino software AND the .hex file from the arduino software
result: can upload again AND the mqtt sketch works too
I don't have to understand that, have I ?
I used my433node created by @olaeke. It works great for me. You just need an arduino, radio and a 433mhz transmitter. Remember that the 433mhz transmitter need 5V directly from power source (not 5V from arduino) or the range can be very inconsistent.
I have almost the same.
In my node , I have a serie for a time, message are received by GW, but the ack is not sent properly... It's always the same child with the problem. Sometimes, the child 3 works, sometimes not... I don't see why this one !!!! and most of the time everything works !
send: 102-102-151-0 s=1,c=1,t=0,pt=7,l=5,sg=0,st=ok:7.0
send: 102-102-151-0 s=0,c=1,t=1,pt=7,l=5,sg=0,st=ok:99.9
send: 102-102-151-0 s=9,c=1,t=23,pt=3,l=2,sg=0,st=ok:1
send: 102-102-151-0 s=7,c=1,t=24,pt=7,l=5,sg=0,st=ok:3910242.0
send: 102-102-151-0 s=2,c=1,t=8,pt=7,l=5,sg=0,st=ok:12.1
vitesse moy: 12.12
vitesse max(rafale): 23.91
send: 102-102-151-0 s=3,c=1,t=9,pt=7,l=5,sg=0,st=fail:23.9
send: 102-102-151-0 s=8,c=1,t=25,pt=7,l=5,sg=0,st=ok:0.0
Quantite pluie temporaire de l'heure: 0.00```
Is it always for 2 hours ? We had it at one Installation, Ethernet Gateway sending to FHEM
But between the FHEM Server and the Gateway was a Powerline unit
FHEM log showed some Problems reaching the network, i think caused by noise in the power line
all attached other Network Units showed Errors for a few seconds, but the mysensors Gateway then always wasn´t reachable for about 2 hours
I don´t know this is because of a fault in mysensors or the fhem Software part for it
Ok, how much voltage/current is needed to open the gate? I changed to a Nano and now I get ~10v
First, I'm a software guy, but I'll try to answer your question. Please correct me if I'm wrong!
I started to type an answer to your question, but it has already been answered many times on the web, e.g. http://electronics.stackexchange.com/questions/144607/do-mosfets-have-voltage-drop-across-source-and-drain-when-turned-on
And for the full background http://www.microsemi.com/document-portal/doc_view/14692-mosfet-tutorial
For your IRFZ44N look up the Vgs chart in the datasheet (http://www.irf.com/product-info/datasheets/data/irfz44n.pdf, page 3, figure 3).
You can see that 4.5 Volts is roughly the bare minimum to get the Mosfet to open its gate, but the maximum current is only about 10Amps there. At 7 Volts it can switch 100Amps -- should be sufficient for your LED strip
Either use e.g. a transistor to switch it using a higher voltage, or use a logic-level mosfet, as @Drcashman suggested.