# Simple and advanced infrared security system
**URL:** https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601
**Category:** Share Your Projects
**Created:** [11 October 2019 12:33 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601 "2019-10-11T12:33:03Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)
#### Post date: [11 October 2019 12:33 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/1 "2019-10-11T12:33:03Z")
Just finished writing a tutorial on how to build a very simple and a more advanced infrared security system.
The system can be activated & deactivated using Alexa and can also send status-messages to your mobile phone using the Telegram node.
[IR Security - Tutorial guide](http://resources-area.co.uk/node-red-flows/ir_security_tutorial.pdf)
[IR Security - Node-RED flow](http://resources-area.co.uk/node-red-flows/ir_security_flow.json)
[IR Security - ESP-Easy (Wemos D1 Mini, ESP8266) rules](http://resources-area.co.uk/node-red-flows/ir_security_rules.txt)
PS:
The tutorial has been updated to explain how to monitor the power-bank's output voltage (nominally +5V) with a simple voltage divider (two 10K resistors in series across the power pins) rather than checking the 3V3 pin on the Wemos.
---
### Author:  [@miker256](https://discourse.nodered.org/u/miker256)
#### Post date: [11 October 2019 21:15 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/2 "2019-10-11T21:15:24Z")
This is really cool @dynamicdave. I'm going to try and build this myself thanks for sharing this. 👍
---
### Author:  [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)
#### Post date: [12 October 2019 09:54 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/3 "2019-10-12T09:54:26Z")
David,
Probably a stupid question, but here I go:
I assume the teacher (= you) has preinstalled some stuff already? Because the way you describe it, it seems so suspicious easy 🤔 Probably the Wemos have passed your magical hands to get them ready to go?
Bart
---
### Author:  [@zenofmud](https://discourse.nodered.org/u/zenofmud)
#### Post date: [12 October 2019 10:07 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/4 "2019-10-12T10:07:36Z")
David does setup the semis’s For his class, but installing ESPeasy is not that hard and once you do it once, upgrades can be done OTA and -of course - you will have a file with your notes with the exact syntax used to do the install...right 🤣
I have all my notes in a file at home and I’m visiting my grandsons (7 hours away) and had to reflash the semis I brought for him (wrong wireless password) and was able to dig up the instructions on the net without too much trouble AND this is on a MAC where I had to do it via the terminal.
---
### Author:  [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)
#### Post date: [12 October 2019 12:04 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/5 "2019-10-12T12:04:14Z")
Hi Bart,
The Wemos D1 Minis (WiFi ESP8266 based) I purchase from China come flashed with Lua.
I re-flash them with ESP-Easy, which as Paul says, is very easy.
> **[letscontrolit/ESPEasy](https://github.com/letscontrolit/ESPEasy/releases)**
>
> Easy MultiSensor device based on ESP8266. Contribute to letscontrolit/ESPEasy development by creating an account on GitHub.
I know quite a few people on this forum use these devices.
The beauty of ESP-Easy is most of the device-drivers you'll need are built-in.
e.g. GPIO pins for LEDs & relays, switch input, temp & humidity sensors, servo motor control, LCD panel control and of course MQTT communication.
The unit is WiFi-enabled so connecting to a home network is a breeze.
The other thing I like about the Wemos is it is inexpensive, so if any of my students should have an accident with them - nobody is going to get upset.
Let me know if you require any further information.
---
### Author:  [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)
#### Post date: [12 October 2019 12:40 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/6 "2019-10-12T12:40:07Z")
> [@dynamicdave](#):
>
> The Wemos D1 Minis (WiFi ESP8266 based) I purchase from China come flashed with Lua.
Ah, from your notes I hoped you bought some that were flashed with ESPeasy already...
> [@dynamicdave](#):
>
> Let me know if you require any further information.
Perhaps I have some time in the winter... But I am using that sentence year already many years, but I never have time 🤣 Too many interesting things for a single life ...
---
### Author:  [@zenofmud](https://discourse.nodered.org/u/zenofmud)
#### Post date: [12 October 2019 13:06 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/7 "2019-10-12T13:06:06Z")
> [@BartButenaers](#):
>
> Too many interesting things for a single life
Too true, oh too true!
---
### Author:  [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)
#### Post date: [15 November 2019 07:35 UTC](https://discourse.nodered.org/t/simple-and-advanced-infrared-security-system/16601/8 "2019-11-15T07:35:28Z")
Please note:
The versions of ESP Easy mega, released from Oct'2019 onwards, now need a single quote placed around the json string to delimit the double quotes and commas in the rule-sets. eg. '{"blah": "blah"}'
```auto
On publishReading Do
publish,node24/ir_detector,'{"node_number":"node%unit%","ssid":"%ssid%","rssi":[rssi#strength],"level":[ir#state],"battery_voltage":[analog#voltage],"temperature":[ds18b20#temperature]}'
If [ir#state]=1
timerSet,1,5
EndIf
EndOn
```