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Postbox sensor


Pocster

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To avoid the build I create a new ‘fun’ project ….

The post box is a standalone unit about 6m from the house . Want to detect when it’s opened presumably by postie to delivery parcel . It does have a letter slot - but I could block that up .

First thought was a Shelly / zigbee battery door sensor . Works sometimes . Range is the issue … Also no mains power at the postbox .

So ! , maybe a Shelly relay mains powered but it would need mains which is around 20m away and then long cable to some reed sensor type magnetic switch in the postbox .

Seems like a lot of work to work out if a letters been posted !

A good / bad plan ? ; other suggestions??

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19 minutes ago, Pocster said:

Not for sale to Germany apparently… why ?

Not a musk nazi device is it ? 😆

 

Because ze Germans at least realise that once the Chinese control our power infrastructure they're only a flick of the switch away from The Great Over Voltage Disaster where all their cheap mains powered wall warts etc catch fire at once...everywhere. It'll be Dresden, Cologne all over again! 

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Postman delivers your prescription enlargement cream, / pump, opens the box triggering the Quinetic door switch

 

Door switch signals the receiver. Receiver brings the relay in.

 

Far right set of normally open contacts hold the relay on and other set bring a lamp on.

 

Lamp stays on until you hit the cancel button.

 

Or something like that...

 

1737829464277379328003882504421.thumb.jpg.ac8a346397b646817ceb6ea5fa63b947.jpg

 

Edited by Onoff
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30 minutes ago, Onoff said:

 

Because ze Germans at least realise that once the Chinese control our power infrastructure they're only a flick of the switch away from The Great Over Voltage Disaster where all their cheap mains powered wall warts etc catch fire at once...everywhere. It'll be Dresden, Cologne all over again! 

Bast’s - I knew it would be like that 

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20 minutes ago, Onoff said:

Postman delivers your prescription enlargement cream, / pump, opens the box triggering the Quinetic door switch

 

Door switch signals the receiver. Receiver brings the relay in.

 

Far right set of normally open contacts hold the relay on and other set bring a lamp on.

 

Lamp stays on until you hit the cancel button.

 

Or something like that...

 

1737829464277379328003882504421.thumb.jpg.ac8a346397b646817ceb6ea5fa63b947.jpg

 

Still got to run 20m of cable . I’m a lazy (expletive deleted) ; that’s all under my decking 

Edited by Pocster
Lazy (expletive deleted)
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19 minutes ago, Pocster said:

Still got to run 20m of cable . I’m a lazy (expletive deleted) ; that’s all under my decking 

 

???

 

No cable required. Just a Quinetic door switch. Doesn't need batteries. Works by magic.....or maybe the charge generated by a piezo electric crystal or something.....

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You need entangled bits....

 

Go quantum - few bits in the postbox entangled with some in the house. And hey presto the latest in postbox sensors.

 

Powering the entangled bits on the street might be an issue but in the house must be a breeze...

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51 minutes ago, Onoff said:

 

???

 

No cable required. Just a Quinetic door switch. Doesn't need batteries. Works by magic.....or maybe the charge generated by a piezo electric crystal or something.....

Interfaces to home assistant ?

What does it generate on activation ??? 
Concept sounds good ….

 

reviews seem not good . A battery I change once a year or less is fine .

 

My problem is WiFi and zigbee at this point is poor / shite 

Edited by Pocster
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37 minutes ago, Bramco said:

You need entangled bits....

 

Go quantum - few bits in the postbox entangled with some in the house. And hey presto the latest in postbox sensors.

 

Powering the entangled bits on the street might be an issue but in the house must be a breeze...

I was thinking this also . But then I drank some 🍷and thought (expletive deleted) it 

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When I make our new post box I'm going to mount a blink camera on the outside, looking in*. Will be in direct line of sight to the router. Anything comes through the post box I'll get an alert on my phone.

 

* CHOON!

 

 

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I was reading about someone that bought a Lora based sensor and didn’t know they needed the hub . Been working by magic apparently for years ; not on their WiFi or Bluetooth or anything else . 
Recently found out it had connected to a Lora hub 5 streets away 🤣🤣🤣🤣🤣

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