Those sensors are susceptible to wifi transmissions. Mine triggered a few times per minute.
Do you still get false triggering if you turn wifi off or move the sensor about 30cm away from the pi?
Phil
I struggled with this recently. There is a problem which I think was introduced with Buster. This worked: Burn Raspbian buster lite to SD (don’t allow Windows to format anything). Create empty ssh file in boot. Put SD card in Pi and Boot up (I have ether connection). ssh into pi. Change password and...
Have you tried sending an email from your recipient account back to to sender?
That might persuade the spam filter that it is a 'good guy' sending you stuff.
Phil
The original poster said that this site was used: https://howchoo.com/g/mwnlytk3zmm/how-to-add-a-power-button-to-your-raspberry-pi The photos look to me as if pins 1 and 2 OR 3 and 4 are connected via the button, and either of those connections would be fatal. The text though says 5 and 6. Which pin...
Can you ping it?
From command prompt (windows or Linux) do
ping 192.168.x.y
Or whatever your pi address is.
This will check whether your router will allow WiFi to WiFi communication.
Philr
Does a router reboot fix it? This is a bit similar to an odd problem I have. I have a TPLink TDW8970 router with mobile devices connected to it by wifi and fixed devices such as printer, NAS, cameras, Mythtv system and TV all hard wired directly or via an 8 port switch. After rebooting the router, a...
I see messages like this so often!
Do you think we need a specific sticky 'phone chargers do not work'.
Not only will the voltage sag as load increases, but I fear won't some be regulated and will give over-voltage at times, with damaging consequences.
Phil
You will have to provide power of some sort if only to power the sensors! In general sensor output is low power which would not transmit easily over the distances you mention.
You could consider power over Ethernet so you can place the pi close to the sensors.
Phil
I will not be popular for saying this as it does not include a pi solution.
I have a Garmin Oregon GPS receiver which does all you want and can also include maps. There will be more modern devices with similar properties.
Phil
I’m trying to find a suitable crimping tool for some small 0.1” spaced pcb connectors. The connectors are like this: https://cpc.farnell.com/leoco/08-50-0032/crimp-terminals-100-pack/dp/CN05551?ost=cn05551&ddkey=https%3Aen-CPC%2FCPC_United_Kingdom%2Fsearch They fit in housings https://cpc.farnell.co...
This is a bit of an aside but it might trigger some thoughts. I have a tp-link W8970 router which has a tick box option under 'wireless advanced' called 'enable client isolation'. When ticked, WiFi to WiFi is indeed blocked though ether <-> ether and WiFi <-> ether all work. When unticked WiFi to Wi...
If you add extra dummy parameters to the end of your line before you split it then I expect it will show that the data you are receiving is not quite what you expected.
Phil
In the absence of other responses I'll jump in here, but it's an indirect answer. You could try the program with and without the bounce and see the difference. Or you could apply your signal to two gpio pins and program one with bounce, one without. Or you could try without bounce, program your own ...
Try Google 'mike rubel rsync'. He describes a system for taking regular (say daily or twice daily) backups of a server. The clever part is that only the changed files are stored so it saves on space and is lightning fast. A brilliant concept! I run a pi doing snapshots each night of my nas with abou...
With that setup you appear to have two devices offering DHCP services. Switch the DHCP server in the router off and rely on the Android phone to do that.
Phil
My wiki reading suggest that your fan output will be an open collector transistor which generates two pulses per rev of the fan. You say that you are seeing these pulses but see ‘noise’ on your oscilloscope trace after the negative going edge but you have clean positive going edge. I’d check earthin...