Best Cheap products for PIR, Temperature, Humidity

Third party integrations
21

@juan11perez Thanks for you’re advice. I’ve gone down your suggested route. I’ve a couple of the Sonoff RF Bridges, flashed with Tasmota and the Digoo PIR sensors. Dirt cheap!

So far I’ve only been able to discover the 433mhz/MQTT data code for when the PIR is activated. Are there any other codes, ie for Low Power / Battery Changes? Or an OFF code?

22

No. the pir sensor only generates an on signal. You have to add an automation to turn it off. This is what i use:

for example

- platform: mqtt
  name: "pir1_masterroom"
  state_topic: 'tele/sonoff/rfbridge/RESULT' 
  value_template: '{{ value_json["RfReceived"].Data }}'
  payload_on: "315C48" 
  payload_off: "315C48OFF" 
  device_class: motion
  scan_interval: 5
  retain: true


- id: reset_single_code_detector
  alias: Reset single code detector
  initial_state: 'on'
  trigger:
  - platform: homeassistant
    event: start # Event can also be 'shutdown'
  - platform: time
    seconds: '/5'
  action:
  - service_template: mqtt.publish
    data_template:
      topic: 'tele/sonoff/rfbridge/RESULT'
      payload_template: >
        {% if (((as_timestamp(now())-as_timestamp(states.binary_sensor.pir1_masterroom.last_changed)) | int) > 5) and is_state("binary_sensor.pir1_masterroom", "on") %} 315C48OFF
        {% elif (((as_timestamp(now())-as_timestamp(states.binary_sensor.pir2_roomtwo.last_changed)) | int) > 5) and is_state("binary_sensor.pir2_roomtwo", "on") %} D0ED58OFF
        {% endif %}

as you add more sensors, you add to the “elif” part of the automation

also no battery information, but you can safely count on 1 year operation with new batteries

2 Likes
23

Thanks for the details @juan11perez! Shame about the lack of battery state. Alas.

24

Looking at the manual in the Digoo PIR sensors, it looks like it does send a low battery message. If only there’s a way to work out and capture what the signal is?

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25

I’ve just bought three of these. I’m planning on getting some old batteries so it complains and hopefully emits the low voltage message. If I find out I’ll post it here, going to do it tomorrow.

Can I ask whilst I’m here do you know what the low and high segments are? I presume you are using them with MQTT?

26

Also I buy these, they are in branded but exactly the same as the digoo but half the price

https://www.amazon.co.uk/dp/B07BSY6JP3/ref=cm_sw_r_sms_c_api_l5wNBb15Y0SH4

27

Let me also link this thread. I had the same MQTT setup as described by @juan11perez however in the end I found this to be more elegant with less config

28

Thanks for the link. Looks like a simple method of implementation.

The low / high segments appear in the MQTT console when a message is transmitted from the PIR to the sonoff-rf-bridge. But as far as I can tell, they have no relevance.

I’d be interested if you’re able to find out what the low-battery message is.

29

As a temporary method of checking the battery status, I’m using this code until I find the 433 low battery sensor message.

It checks to see if there’s been a message from a given sensor in X number of days. If it hasn’t then it presumes the battery may have run out and then sends a notification to me.

- alias: "Battery Sensors: Low battery notification"
  trigger:
    - platform: template
      value_template: "{{ as_timestamp(now()) -  as_timestamp(states.binary_sensor.front_door.last_changed) | float > 345600 }}" #4 Days in seconds 345600
  action:
    - service: notify.notify_group
      data_template:
        title: "Battery Sensors: Low battery notification"
        message: >
          {{ trigger.from_state.attributes.friendly_name }} battery needs checking.
2 Likes
30

Ah nice! Elegant idea!!

I’ll implement the same.

On another note have u got multiple so off gateways running?

31

I bought a couple of gateways initially. But so far one seems to be covering my home fairly well. I’ll look to implement another in the future if needed.

32

Hi guys,
I saw a youtube clip that explained rules in the rf bridge console…
I have done it and it works…
This is my,
Rule1 on rfreceived#Data=48E00A do Publish2 RFBridge/sensor1/Open Open endon on rfreceived#DATA=48E00E do Publish2 RFBridge/sensor1/Closed Closed endon

the 48E00A and 48E00E are the open and closed for my window sensor. I also have

rule2 on RFReceived@data=7EA826 do backlog publish2 RFBridge/Motion1 ON; ruletimer1 10 endon rules#timer=1 do publish2 RFBridge/Motion1 OFF endon

this is for my PIR which I use a timer to turn the PiR to off as it only has 1 code.