Simple wireless 1/0 transmitter/receiver 1

[Skogsgurra]

Need a simple device that can feel a contact closure and transmit the 1/0 state over around 100 m distance. More is better.

It shall be used for temporary check out of measurements and there is a demand for low latency, or at least consistent latency. Either less than around 500 us latency or same spread. In the latter case, latency could be up to 5 ms.

Battery supply. Not critical in any way. Could even use a small lead ackumulator. Operation for a week or so may be needed, but seldom more than five or six hours.

Looked at standard solutions from automation companys. But they all seem to have more latency or spread than I think will work.

Anyone?



Gunnar Englund

http://www.gke.org

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Half full - Half empty? I don't mind. It's what in it that counts.

 

[Skogsgurra]

Thanks, IR. That eliminates a few problems.

Where can I expect 433 MHz?
I sure have lots of it in my rural setting. I was even able to read the rolling code from our car keys. And there are other signals that I can't identify. Distance to neighbours is at least 60 m (200 feet). Not much traffic in the street.

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.

 

[3DDave]

https://www.edn.com/electronics-blo...reless-connectivity-in-the-Internet-of-Things

 

[Skogsgurra]

I guess that the 433 MHz road is blocked, then. I need to transmit a lot more than the 300 ms per ten seconds mentioned in Dave's link.

Good to know. It was a fun excursion into a field where I have not been before. Back to IR bursts then.

Gunnar Englund

http://www.gke.org

--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.