@AWI I discovered it the hard way tonight. Lot of "Unknown sensor type" in my domoticz log. I have it working by declaring it as a distance, pressure etc. It's really dirty but at least for know I can track my RPMs. I guess I will try to poke around on the domoticz forums this week end to see if there is something cooking on their side. Thanks!

Thanks again @martinhjelmare Upgrade went successfully.

Hi! if it can help.. https://github.com/hallard/MAX31865-Breakout https://github.com/hallard/arduino-max31865

@Tmaster You give each sensor a child id (0-254) in the node.

@BulldogLowell said: @mntlvr said: And if all six switches are set to gnd the total current would only be 1.5 ma (5volts /20k)x6=.0015 amps I believe. the internal pullup resistors are 20k-50k according to arduino spec. yeah, I know, but if you are underpowered already (the radio....) the extra draw may create an issue... who the heck knows. I'll try on one of mine when I get the chance... your code works, and that's a treat, but now I need to understand why the simpler execution of the same code doesn't seem to cooperate with your rig. weird... you code with pinMode(buttonPin[i], INPUT); exactly same board and USB power supply and same transceiver, here are the results Sending device info...sensor started, id 32 send: 32-32-0-0 s=255,c=0,t=17,pt=0,l=5,st=ok:1.4.1 send: 32-32-0-0 s=255,c=3,t=6,pt=1,l=1,st=ok:0 read: 0-0-32 s=255,c=3,t=6,pt=0,l=1:I send: 32-32-0-0 s=255,c=3,t=11,pt=0,l=13,st=ok:RemoteControl send: 32-32-0-0 s=255,c=3,t=12,pt=0,l=4,st=ok:1.15 Setting up Pin0 send: 32-32-0-0 s=0,c=0,t=0,pt=0,l=0,st=ok: Setting up Pin1 send: 32-32-0-0 s=1,c=0,t=0,pt=0,l=0,st=ok: Setting up Pin2 send: 32-32-0-0 s=2,c=0,t=0,pt=0,l=0,st=ok: Setting up Pin3 send: 32-32-0-0 s=3,c=0,t=0,pt=0,l=0,st=ok: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: Setting up Pin4 send: 32-32-0-0 s=4,c=0,t=0,pt=0,l=0,st=ok: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: Setting up Pin5 send: 0-0-0-0 s=5,c=0,t=0,pt=0,l=0,st=ok: read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch Sensor presentation complete send: 0-0-0-0 s=3,c=1,t=16,pt=2,l=2,st=ok:1 Pin 3 changed state... New State: Tripped send: 0-0-0-0 s=0,c=1,t=16,pt=2,l=2,st=ok:1 Pin 0 changed state... New State: Tripped send: 0-0-0-0 s=1,c=1,t=16,pt=2,l=2,st=ok:1 Pin 1 changed state... New State: Tripped send: 0-0-0-0 s=2,c=1,t=16,pt=2,l=2,st=ok:1 Pin 2 changed state... New State: Tripped send: 0-0-0-0 s=3,c=1,t=16,pt=2,l=2,st=ok:0 Pin 3 changed state... New State: Not Tripped

If you look at the Netatmo devices you can see that they have plastic caps and a long plastic notch. I'd bet that the antenna can be found in such an area... I dont think that a small thickness will help to let the radio signal pass. Think of that very thin µ-metal sheet covers on high frequency circuits e.g. in TV or Radio inputs (where you want to stop a radio transmission). They are built to not let radio waves pass and they are thin - so I dont think the thickness plays a major role. As Bulldog wrote paramagnetic blocks radio waves. And aluminum stays paramagnetic even if you reduce the thickness. But I made the experience that relatively small areas, where the radio waves will not get blocked (e.g. plastic caps) can make the difference between no signal and "its working". Also keep in mind that nearly all antennas have a direction. So changing the orienation of the antenna might dramatically change the transmitting capabilties.

@vladimir No, I use a WIZ5100 module. Search the forum. Many users (try) :-)) to use ENC28J60.

I apologize for the questions and how simple they may be, as Im new to this community but very intrigued with the creativity and endless possibilities.

Hey guys, I was justing wondering, is there a way to deactivate the motion sensor if not being used? Eg: My motion sensors are connected to Homeseer and they show up as sensors but I was wondering if I could have an ON / OFF control to deactivate or active the motion as needed.

Any updates on how this turned out?

@Mouridsen Thanks for the follow up!

I'm thinking of 4 PIR sensors (at each end of the two aisles). And I was thinking of a reed switch at the top of the garage door opening, and one at the door into the house. And the most convenient location for the relays controlling the lights is still a 7th location. I could put 7 wireless nodes into the garage, but then I have to run power to all of them - if 5v we still have the same long wire issues, if 120VAC then I need 7 power supplies. And the local control now involves passing messages between nodes rather than just sensing input pins and controlling output pins on the same uC. The cables supply power to the RF enabled nodes will have the same length (whether DC or AC power) as the cables going to a simple sensor, and follow the same routes. So it would be possible to do that, but at considerable cost in money and time and complexity - compared to just running a three or 4 wire cable from the main node to a $2 PIR located 1o-20 feet away, if that can easily be made to work (perhaps with the addition of a couple of small, cheap passive components. I don't know if I do need to worry about inductance, capacitance, reflections etc - that's why I'm asking. These things aren't usually specified one way or the other - you kind of need some practical experience. If those are indeed killers that cannot be fixed with a couple of passives, then I may go to the "make every sensor a full node with AC power supply and distribute AC to them instead" route. But wouldn't it be nice if I can do a $2 easy fix instead? One data point - in the Do It Yourself Christamas lighting control community, they routinely get away with sending TTL or CMOS signals quite a ways from a control unit to an optoisolator input (which controls a Triac to form a SSR which does PWM dimming of an AC circuit). The signals are just a 120 Hz PWM signal but the edge timing is at 120Hz * 256 PWM divisions. You won't find much about driving a 50' cable from a TTL or CMOS output in the datasheets, but it works in this application! It would not work if you were sending a 1 Mbps signal tho. So I have some hope that a PIR 20 feet down a cable may be able to pass back a quite usable logic signal, since it changes rather rarely. But I was hoping for some advice about the gotchas. Remember the sensors I've mentioned are magnetic reed switches, LDRs, and PIR sensors - only the latter needs power per se separate from the signal.

Hi.... hehe... I must decode it from source code?? hmmmm... interesting... where I need to write my question? power down mode .. every 1 sec wake up .. using timer2 32kHy crystal 2.make sensor with more sensor type in one device .. for example .. temperature , energy meter, bin input state.. etc..

@daulagari There are some on AliExpress. A bit cheaper than Antratek but not much. Not 100% sure you get the Uno shield adapter but it seems so. Still no big deal with the price since we only need one gateway.

@grint how would a compass sensor perform in a lawnmower robot?

take care to have the good number of pin, some sketch use digital others analogic... I've ordered light sensors and sound sensors without analogic, I couldn't use them for my target use...

Very Cool -- Thanks