HC-SR501 PIR issue's

[the cosmic gate]

Anybody who can help me :
Used a hc-sr501 (PIR) on a ESP (sonoff) :


, But this sensors detects movement, while i know for sure there's no movement


As you find out, its every x seconds .
Anybody who can help me

[cherowley]

Yep same issues I had/have.

I wrapped the pir wires in foil then grounded the foil and that worked pretty much so then I tried using coax to connect the pir and that also worked.

[the cosmic gate]

Yep same issues I had/have.

I wrapped the pir wires in foil then grounded the foil and that worked pretty much so then I tried using coax to connect the pir and that also worked.

Could you send me some pictures ? You only wrapped the PCB i think ?
And did you use COAX as connector cable instead of the standard cable ( dev board)

[the cosmic gate]

Yep same issues I had/have.

I wrapped the pir wires in foil then grounded the foil and that worked pretty much so then I tried using coax to connect the pir and that also worked.

I just changed the singal cable to a piece of coax, but still it detects motion while there absolutely no motion.

Did you also ground this coax cable to the earth?

[the cosmic gate]

Even more strange : when I completely disconnect this PIR thereally still some detected motion .......
Looks like interference or something

[hvdwolf]

Same for me.
I'm running ESPEasy 107.
In my case the PIR sensor is almost constantly on "ON".
I used to run it on a arduino pro mini but decided to put it on an espeasy (nodemcu 1.0)
If I simply put it back on the pro mini it functions flawless. When I reconnect it to the espeasy it goes haywire.
On the pro mini it requires no extra actions, so I did not try coax cable or whatever on the espeasy.
The espeasy also runs 2 ds18b20 for my freezer/cooler combi.

[manjh]

Did you try to experiment with the pullup tickbox?

[the cosmic gate]

Did you try to experiment with the pullup tickbox?

Yep i did:

[the cosmic gate]

Anybody with a working solution ?

[the cosmic gate]

Anybody with a working solution ?

Nobody a working solution? Pull down resistor? One other solutions please?
(Getting sick of the lamp which switches on etc when not needed)

[kr0815]

I had the same problems in a test set-up - as long as the PIR sits behind / next to the ESP, a lot of false alarms

This has nothing to do with Software / Pull-Ups,..., but it´s because of the cheap design of the PIR
You could either try to, as suggested, put some shielding metal (grounded) between ESP and PIR, or find another set-up where the ESP is a few centimeters away from the PIR

[hvdwolf]

(Was a week on holiday)
Please read this article. It describes how to use the PIR sensor on 3.3V without soldering. I already did that on my arduino pro mini but used the 5V on my nodemcu (well, actually: I tried to use 5V but that didn't work).
I now connected the PIR data wire to GPIO14 (~D5) and the power (via PIR sensor 3.3V connection) to 3.3V and GND to GND (of course). It works flawless. I also tried with GPIO0 (~D3) and that works just as well.
No shielding, no special cables. First with 3 short dupont wires, now with unshielded 1½ meter wires.

Config:

[kr0815]

now with unshielded 1½ meter wires.

That`s why it works, the cable doesn´t have to be shielded, but you need a certain distance between ESP and PIR
Most critical, in my experience, is if the PIR sits in front of the ESP

[hvdwolf]

now with unshielded 1½ meter wires.

That`s why it works, the cable doesn´t have to be shielded, but you need a certain distance between ESP and PIR
Most critical, in my experience, is if the PIR sits in front of the ESP

No, that's why I mentioned:

I now connected the PIR data wire to GPIO14 (~D5) and the power (via PIR sensor 3.3V connection) to 3.3V and GND to GND (of course). It works flawless. I also tried with GPIO0 (~D3) and that works just as well.
No shielding, no special cables. First with 3 short dupont wires, now with unshielded 1½ meter wires.

It doesn't make any difference for me: short (10 cm) or long wires.

Edit: Now I understand the confusion. I should have typed: "both with 3 short dupont wires as well as with unshielded 1½ meter wires."

[the cosmic gate]

are there people with the same problem and even beter a solution for this problem

[the cosmic gate]

Just did one other mod on the pir side, soldered on the pin Instead of the voltage divider.
But there's still the same issue every 3 seconds on/off.
Also replacedo the pir, but nothing
More/ other solutions?

[kr0815]

As i said earlier, you need distance between PIR and ESP - Did you try that ?

[manjh]

I had a similar problem with different hardware.
Used a standalone PIR sensor, that gives it's signal thru 433MHz. It was located about 1 meter from the RFLink unit: the PIR was triggered far too often, also when there was nobody at home to trigger it.
It might have been the LED on the RFLink that triggered it, or maybe some other kind of interference.
Fact was that when I moved the PIR sensor to another location, it worked just fine...

[rtenklooster]

Okay,
I ordered a few days ago this item:
http://www.aliexpress.com/item/5-8GHZ-M ... 85648.html
I attached it to a test esp module, i must say, it works great.
Have it running for two days now, no false positives, it's mounted inside a closet.

After a little ajustments it covers my whole living room, it's sensitive enough to notice people when watching tv on the couch.
At first, it also noticed when a walked outside, trough the glass after a little adjusting it works fine.

I realy like the fact that it's sensitive, it can be mounted inside a closet, totaly invisible but still very responsive
No more pir's for me.. looking trough walls / windows, how nice is that

[the cosmic gate]

Okay,
I ordered a few days ago this item:
http://www.aliexpress.com/item/5-8GHZ-M ... 85648.html
I attached it to a test esp module, i must say, it works great.
Have it running for two days now, no false positives, it's mounted inside a closet.

After a little ajustments it covers my whole living room, it's sensitive enough to notice people when watching tv on the couch.
At first, it also noticed when a walked outside, trough the glass after a little adjusting it works fine.

I realy like the fact that it's sensitive, it can be mounted inside a closet, totaly invisible but still very responsive
No more pir's for me.. looking trough walls / windows, how nice is that

Can you share the adjustments you made ?
I want to have a "pir" alike solution for just the hall / Lobby, when somebody entered it ( to go outside - exit the house / or enter the hall on the first floor)

[rtenklooster]

I replaced the sensitivity resistor with a 47K
The time resistor with 4.7K.

Need to finetune a little bit because i just noticed, when my wife goes to the toilet at night, i got a (false) positive from the sensor one floor lower in the living room.

[NietGiftig]

I when my wife goes to the toilet at night, i got a (false) positive from the sensor one floor lower in the living room.

Just be glad it only tranfers movement, not smell

[costo]

@ NietGiftig
I believe you are mistaken a radarsensor for this type of sensor:

http://www.aliexpress.com/item/DC-5V-MQ ... dc9826dc88

[tozett]

i ordered six of these from rtenkloosters post:
http://www.aliexpress.com/item/5-8GHZ-M ... 85648.html
and will try them out...

[rtenklooster]

i ordered six of these from rtenkloosters post:
http://www.aliexpress.com/item/5-8GHZ-M ... 85648.html
and will try them out...

Nice The sensor in my living room is very stable and has no false positives. It's mounted behind the sofa, so its:
outside | wall | central heating radiator | RADAR | Sofa

The central heating radiator act's as a shield, so no false positives when someone walks outside.


The sensor on the upper floor however, is giving some false positives.
I'm thinking about some minor tweaking te resolve the false positive's when there's movement detected downstairs.
My plan is to set the delay to the 1 second minimum, and use rules + timers to filter the output.
The idea: only send data to domoticz when x number of triggers appeared in x seconds.

Maybe my device is faulty, i ordered a few new ones. However if the new one is a little to sensitive i might give this idea a try.
In order for this to work, i need global variables, for as far as i know those are not present in the rules section.
I have seen this as a feature request somewhere, this might be a good idea.

So the rule i have in mind wil look something like this (just for the idea):

Code: Select all

On Rules#Timer=1 do  
  Globl#Motion 0
endon

On Radar#Switch=1 do
timerSet,1,30
Global#Motion++
  if [Global#Motion]>2
    // Send to domoticz
  endif
endon

In order to accomplish this we need the option to do some basic calc in rules, we have to manually send data to domoticz and we need to set / get (global) variables. Quite a wish list for Martinus i guess

[edautz]

I managed to stabilize my pir setup.

http://www.esp8266.nu/forum/viewtopic.php?f=5&t=671

[Dylantje]

Is the radar 5.8Ghz the best option?

[tozett]

I replaced the sensitivity resistor with a 47K
The time resistor with 4.7K.
Need to finetune a little bit because i just noticed, when my wife goes to the toilet at night, i got a (false) positive from the sensor one floor lower in the living room.

Would be glad about FEEDBACK....

because i finally managed to try one of my 6 month old "new" RADAR sensors.
i used some info from CNX and Scargill

i assumed they would trigger all the time, if i sit directly in front of them.
instead it seems to me, they are not "that" sensitive at all.
i made a rule to switch a led, if the RADAR switch goes to 1, but it does this only sometimes. i feel.

do i have any mistake in my config, or is this "slow" as a real PIR...?
i would be glad, if anybody could share some experience with the RADAR module...

[tozett]

i left all default resistors in place,
means probably 20k for sensitivty (10-100k, higher resistance is less sensitivity, like a comment wrote)
and also default for time (30s) (as i checked later, on my pcb there is _no_ resistor ~ 30sec ??)

[tozett]

new info from aliexpress seller website:

[DeNB3rt]

any updates?

[tozett]

i played with the radar-pir.
looks they are working ok, but they have 360 degree observation.
i put one in a tin-can and tried to limit it to 100 degree with that.
but i had to put this on hold. i am short of time ...

meanwhile i had a problem with rfid on my frontdoor and i am trying to get this solved first.
the rfid-reader has a longer range, buti cant get it to work as wiegand-input to espeasy.

must solve this first...