Desk banging sensor scheme?

[wkearney99]

Anyone done something like use a vibration sensor to track cumulative events? I'd like to implement something that detects banging on a desk surface. As in, kids banging on the desk out of frustration while gaming. Yeah, parenting is fun sometimes. I could hard-mount something to the underside of the desk to get a solid signal. I'd want to avoid mis-fires for unrelated activity like walking around, doors closing or passing trucks. It'd be interesting to tie this into discord/steam or other gaming networks as an additional indicator.

[Pete]

I was going to suggest a Geophone but these days you can purchase an Ebay "Vibration Sensor Trigger Board Relay Switch Module for DIY Alarm Time System" which is what I used for my DIY'd brick mailbox many many years ago.

I wrote about using this sensor here a few years back.

Cocoontech Blogs

[Guest]

If you already have or don't mind adding a 433Mhz receiver to your setup:

https://compatible.openmqttgateway.c...-shock-sensor/

[wkearney99]

If you already have or don't mind adding a 433Mhz receiver to your setup:

I do have an RFXCom that I never used much... though I recall it being tedious to configure/use. And I'm trying to move things into VMs, and USB raises... complications in that regard.

[wkearney99]

Heh, an earthquake sensor would be a fun way to approach it.

[fresnoboy]

This zigbee aqara sensor should work well: https://www.aqara.com/us/vibration_sensor.html

I have one mounted on a safe door to send me email anytime it's opened, but it also picks up vibration if I bump the safe as well. Cheap and effective, and works well with jowihue's zigbee PI.

[outbackrob]

Easy Peasy. https://www.monoprice.com/product?p_id=15269

I have one of these attached to a basket that I need to check every day. If it moves, I know it and I have a counter to count how many times it gets moved. Takes 5 minutes to set add to your Z-Net and create a counter for it.

[wkearney99]

What's the simplest way to watch values changing for vibration? Send a debug message to the log? I picked up an Aqara sensor and want to get a better idea how much vibration different activities generate.

EDIT: Figured it out, sort of, using an immediate script. 2771 is the 'Vibration Strength' value for the Aqara sensor.

&nhs.WriteLog("Vibration", "Vibration Strength: " & hs.DeviceValue(2771))

Now I just have to devise an effective scheme to recognize the action. Sort of like a 'tilt' function on a pinball machine? I want to avoid false positives, if possible.

[wpiman]

Easy Peasy. https://www.monoprice.com/product?p_id=15269

I have one of these attached to a basket that I need to check every day. If it moves, I know it and I have a counter to count how many times it gets moved. Takes 5 minutes to set add to your Z-Net and create a counter for it.

Huh, I had one of those and imported in into HS and it never fired. This was a while back, so maybe some of the kinks have been worked out.