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💬 Soil-moisture-meter

openhardware.io last edited by openhardware.io

https://www.openhardware.io/view/672/Soil-moisture-meter
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naty6458 last edited by

Thank you !!
You have the pcb design file ?
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Serg2055 last edited by

Hello. sorry, I can't share the Board source code with you. I can either sell you the project or sell the finished device.
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naty6458 last edited by naty6458

I want the product Send me email
( naty6458@gmail.com )
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Nca78 Hardware Contributor last edited by

Might be a stupid question, but how does this (and it seems, your other projects on openhardware website) qualify as "open hardware" ?
The only thing looking like "source" is a jpg picture of the schematic that's so small and compressed it's not even readable.
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Nca78 Hardware Contributor last edited by

@Serg2055 as the name says, openhardware.io is for open hardware.
You are allowed to sell PCB units, partially or fully soldered boards, but selling source is not an acceptable option. Please include readable schematic and source of your boards or at least gerbers or bom. For all your boards posted on openhardware.io.
Thank you !
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Binary Control Modules , Switches, or Outlets on a Vera Edge
My Project • sensor • • mntlvr

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@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
Connect sensors directly to the Gateway (again)
Development • gateway sensor development • • mortommy

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@Tmaster You give each sensor a child id (0-254) in the node.
Sense if my Kitchen hood is running?
General Discussion • sensor house ventilation electrical consumer • • ausbremen

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6
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What about a vibration sensor? At least in my kitchen, the fans do produce a slight vibration to the metal roof thing. They pretty cheap on Ebay, I must try it myself...
Network Gateway with Sensors/Actuators
My Project • gateway relay sensor network • • lunarok

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No one has replied
💬 Multi-purpose sensor
OpenHardware.io • mysensors nrf24l01 sensor atsha204a bh1750 htu21d w25x40clsnig • • openhardware.io

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I have published all the documentation in a Github repository. If someone wants to make PCBs, I recommend that you wait a little longer until you receive my PCBs and try them. https://github.com/giltesa/SmartHome
Perimeter wire with sensors for robotic mower
Hardware • sensor perimeter garden wire mower • • grint

4

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4
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3232
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@grint how would a compass sensor perform in a lawnmower robot?
How long a cable can one have between the uC and a sensor?
Hardware • sensor cabling • • Zeph

4

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4
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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.

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