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| /** | |
| * I figured out you can fit a Shelly 1 inside the case of many outdoor motion sensors. | |
| * Coupled with that fact that recently, Shelly added a feature to de-couple the switch from the relay | |
| * so they act independently, makes this a great combo! Simply wire the output of the PIR motion sensor | |
| * (the wire that normally goes to your outdoor light) to the switch input of the Shelly and wire | |
| * the lightbulb to the L output of the Shelly. Then, in the Shelly app or directly via the devices webpage, | |
| * select the button type as 'Detached Switch' and use the code below to make it work normally. | |
| * Don't forget to adjust the daylight sensitivity to full daylight if you want the motion detection to work 24/7. | |
| */ | |
| #### AUTOMATIONS #### | |
| automation: | |
| - alias: Shelly PIR Auto | |
| # initial_state: true | |
| # hide_entity: true | |
| trigger: | |
| - platform: state | |
| entity_id: sensor.pir_motion_sensor_status | |
| condition: | |
| condition: or | |
| conditions: | |
| - condition: sun | |
| before: sunrise | |
| - condition: sun | |
| after: sunset | |
| action: | |
| - service_template: "{% if is_state('sensor.pir_motion_sensor_status' , '1') | |
| %} light.turn_on {% else %} | |
| light.turn_off {% endif %}" | |
| entity_id: light.pir_motion_sensor | |
| light: | |
| - platform: mqtt | |
| name: "PIR Motion Sensor" | |
| state_topic: "shellies/shelly1-0x0x0x/relay/0" | |
| command_topic: "shellies/shelly1-0x0x0x/relay/0/command" | |
| availability_topic: shellies/shelly1-0x0x0x/online | |
| payload_available: "true" | |
| payload_not_available: "false" | |
| qos: 2 | |
| payload_on: "on" | |
| payload_off: "off" | |
| retain: false | |
| optimistic: false | |
| ## SENSORS ## | |
| sensor: | |
| #### Status of Shelly switch input for PIR ### | |
| - platform: mqtt | |
| name: "PIR Motion Sensor Status" | |
| state_topic: "shellies/shelly1-0x0x0x/input/0" |
If you have a device that supports Shelly Scripts (I'm using a Shelly 1 Plus), you can use this setup, but run the automation locally (basic script below). This has the benefit that it will work as expected even if the wifi drops. You can obviously still control the switch and get the PIR state in Home Assistant. I bought a Sebson IR_OUT_E on Amazon, and mine didn't work initially, although sticking a 330kΩ resistor between the switched live and SW port on the shelly sorted it.
Shelly script:
Shelly.addEventHandler( function (event, ud) { if((event.info.state || false) && event.component === 'input:0'){ // PIR Triggered Shelly.call('Switch.Set', {id: '0', on: true}); } }, null );I then use an auto-off timer on the Shelly, which means I can configure it without having to turn the dial on the PIR sensor.
@BenHarris Just wanted to confirm this before i go ahead and do something similar - i have a couple of mains powered PIR units and there is a continual voltage output from them to the Shelly (i have flashed with Tasmota) - are you saying you just put the Resistor in between the (supposedly !) switched live output of the PIR and where it goes into the SW1 input on the Shelly ? i.e. wired it inline with the cable and then put the input to the SW1 input of the shelly ?
Regards
Craig
@BenHarris Just wanted to confirm this before i go ahead and do something similar - i have a couple of mains powered PIR units and there is a continual voltage output from them to the Shelly (i have flashed with Tasmota) - are you saying you just put the Resistor in between the (supposedly !) switched live output of the PIR and where it goes into the SW1 input on the Shelly ? i.e. wired it inline with the cable and then put the input to the SW1 input of the shelly ?
Regards
Craig
I tried this (the inline method) with various resistor values but no luck: Shelly never detects the signal, so was thinking the resistance was too high, but lowering it did also not help. Really looking forward to a solution where one could measure something and calculate what resistor values would make sense.
@michamichamicha There is a bit of chatter at the beginning of this thread about adding another relay between the motion sensor and the Shelly input. It seems the Shelly SW input is 'floating' as indicated by this post here. Mine was working flawlessly in the early days but in the last 12 months, it triggers randomly all the time so I'm going to remove it and debug and I'll report the findings here.
For reference, I just popped a Shelly 1 PM on the bench with just a 230V AC supply and unloaded, the SW input measures 126V AC.
@BenHarris Thanks for chiming in. That is what I was going to suggest. Appreciate the input. Actually might need to do that to mine as it's been a bit erratic lately too!