Failsafe IoT Light Switch with ESP32, ESP8266 OR Arduino for Home Automation - Baba Awesam

In this video I show you how to achieve failsafe when implementing IoT light switch using ESP32, ESP8266 or Arduino such that even if the Microcontroller fails or wifi goes down, you will be still able to turn ON or OFF the lights. Since you can control your lights with web interface, you can integrate it with Openhab and subsequently with Amazon Echo or Google Home using voice commands.
Code for the project which uses web requests
github.com/samirsogay/esp-ip-...

[@Dave_889]

Great video. I have been thinking of doing something like this , that way it wont require internet and it also have a fail safe

[@timchan1783]

Is it possible to do this with 12v setup? I want to be able to control my interior van lights with Alexa but also have a failsafe wall switch. Thank you!

[@SiddheshBagade]

Hello sir, I just learned about latching relays - also called as bistable or impulse relays. Can you cover this topic on 2 way or 3 way switches as it will not keep taking current as normal relays to keep it on.

[@leventelikhanecz2258]

hi Samir, do you use a simple relay? mean not self latching one? imagine you have your relay in the NO (normally open) position. once the esp fails it falls back itself to NC (normally closed) state, toggling the lamp state. improve failsafe with self latching relay (regardless 1 coil or 2 coil type). there you just give a short pulse (pulsetime) on the coil/s to toggle state of relay. if the esp dies silently the relay will keep its present state. (imagine you wake up in the middle of night due to a lamp start burning into your face upon esp death) or the opposite.

[@SamirSogay]

I use a simple relay. I never knew there were self latching relay. My lights do toggle if I reboot the microcontroller when it hangs. Thanks for the input.

[@leventelikhanecz2258]

@@SamirSogay there are 2 types, single coil and 2 coil. the single coil you have to reverse polarization to toggle, while on 2 coil type you have to drive both coil same polarization and pulse them accordingly to toggle. may require little tricky programming depends on firmware / control OS.

[@leventelikhanecz2258]

by the way, in between your 2 endpoint (in this case the 3 pin switch and the esp relay - which acts as a 3 pin) you still can put endless number of so called "cross switch". 3pin - X - X - X - 3pin. the cross switch has 4 pins. on toggle it change routing between the upper line and the lower line. where you have several entry point ( a lobby ) each switches will do the light. | | | | / \ | |. | |

[@NEWBI3GAM1NG]

nice video, hope their is a clear and complete wiring diagram with the conventional and the relay switch module. thanks in advance.

[@SamirSogay]

If you see the video, there are some diagrams which should clarify the setup. It is important for you to understand 2 way switches. This will help in understanding this setup.

[@bespired]

Smart. I'm looking for a physical switch to turn the lights on via wifi. So I don't need to pull a wire.

[@SamirSogay]

There maybe a way by which both places will have esp8266. One will have a physical button and the other will have a relay. They will both communicate with wifi.

[@SiddheshBagade]

To have the privilege to be so lazy, You have to work hard once. - Samir Sogay, 2018. 0:31

[@nicolassuarez144]

Hi! Very good tutorials! There is an alternative to hi-link 3.3v to power supply the esp board?

[@awesamphotography7688]

Hi, there is hlk-pm03 for 3v output

[@codingspace1143]

OK..but with failsafe can you update the status of light in ALexa?

[@SamirSogay]

No, you can't.

[@mohammedsikandar6056]

Is it possible to switch-on from conventional switch and switch-off from the esp-relay board? If so, does the UI in the app update accordingly?

[@SamirSogay]

Yes but ui does not update

[@mosikud]

Thanks for the reply.. I am almost done with this project.. I have all the setup, I only need to connect esp32.. Any suggestions on how to update the UI?

[@SamirSogay]

@@mosikud Probably have a light sensor in the room which will update the switch status based on light level in the room.

[@aliasaad1347]

can this method used with bylnk and give correct stateus of lamp

[@SamirSogay]

Unfortunately there is no way to track the current status of the lights. If you can have a light sensor in the room, you can use that to update the status.

[@hycron1234]

@@SamirSogay - Hall Effect Current Sensor, then you would know if it was on or off.

[@SamirSogay]

@@hycron1234 Nice option for the people who want status change in Openhab.

[@tahabutt474]

hey can you provide the circuit diagram of this circuit

[@CATips]

Sir I have using water tank level transmitter for measuring the tank level. The transmitter output is 1 to 5 V variable Means 1V need to set 0% 2V need to set 25% 3V need to set 50% 4V need to set 75% 5V need to set 100% Can you make gauging display via blynk app with modemcu Please make code for me

[@UmeshKumar-vu9uz]

Can you demonstrate with One way button or normal button as well

[@SamirSogay]

It cannot be done with 1 way button

[@tirthrajgandhakwala6201]

I have made automation system for home which toggles for both manual and esp32 command over LAN. But the issue is that I cannot change the status of online Switch GUI to ON or OFF when manually state of output is changed. Any way I can change online status of switches when I change them manually?

[@SamirSogay]

Unfortunately no. You may have to rely on a light sensor which could toggle status based on ambient brightness.

[@mogilogi1956]

you can use current sensor, to sense the current going to the light to know if it's on or off

[@Defaultgamingyt]

hi bro i have only one way switch can i do it? and if yes can you give me diagram for it?

[@SamirSogay]

Hi. The only necessary requirement is having a 2 way switch with 3 terminals. Other than that you need a relay and a micro controller to control the relay. Connectivity is pretty simple if you follow the video.

[@RajveerSingh-yb6zq]

I have the Similarsetup in my house and I want to Upgrade it, Problem is if I Turn the "ON" the Device using Micro Controller in My Phone Display it will say its On, But if I Turn the device off Using the conventional switch, Microcontroller has no means to know that the Device is off Now, So in My Phone, it will still say its on, And If I click it again to off in UI, It will Turn the Device ON but on Phone's Display it will say it's off. Do you have any solution to this problem Bro?

[@SamirSogay]

This is the most common question I get on this video but unfortunately there is no easy answer. One way of maintaining the status of the Web button could be through light dependant resistor. If light is above a certain brightness, it could turn status of button on and vice versa.

[@shahidmustafa7768]

Hi Samir, would it possible if you can share the code or project folder.. it would be great.. thanks in advance

[@SamirSogay]

I have added the code in the video description.

[@proFFGaming2]

What will happen in power cut will switches remember their on off state or they will all off when power comes again?

[@hycron1234]

They would remember their state. 🙂

[@proFFGaming2]

@@hycron1234 thanks bro

[@mani4812]

Sir how get return feed back indicating Which light is on or off condition plz tell sir

[@mani4812]

When switch on the light by manual which indicates in app light is on

[@brunoleonmexico7767]

You can't.

[@SamirSogay]

There is no way of feedback. You might have to rely on light sensors.

[@SaturnAR]

@@SamirSogay or you could just add a current sensor at the output power cable, and use this info to update the status accordingly.

[@Roaming_with_akshay]

How it will work with Google assistant?

[@SamirSogay]

This esp8266 integrates with openhab and openhab has Google binding.

[@aliasaad1347]

current statues is appeared correct on application ?

[@SamirSogay]

No, there is no way of knowing current status

[@harjaskaran]

How to modify the code add additional switches

[@SamirSogay]

I think if you go through the code, you will be able to alter it for your requirement.

[@ahmadimamadyan1396]

How to setup the setting of openHAB app?

[@SamirSogay]

Openhab app depends upon openhab server which you must run on Raspberry Pi

[@unbreakabledesire14]

Bhaiya mera Manual switch bina hotspot connect kiye kaam nhi kr raha hai ek baar hotspot connect krne ke baad switch kaam kr raha or hotspot band kr raha phir bhi switch kaam kr raha lekin stating me mujhe ek baar hotspot connect krna pad raha phir switch kaam kr raha , Mtlb switch ko Initialise krne ke liye hotspot connect krna pad raha jo ki acha nhi hai if phone nhi raha to switch kaam nhi krega PLZZ SOLVE THIS PROBLEM..🙏🙏

[@nu199ds]

There is one problem in this system. Suppose you have powered on the light by triggering the relay by the web server and you switched it off by the wall switch. You go on a pleasure trip for 2 days. Few minutes later, your area gets a power cut for 5 minutes. Heres what happens when the power comes back on.... you relay will start at the N/C configuration. The wall switch will supply power across the relay to your bulb until you have returned home.

[@SamirSogay]

I didn't even have to take a trip to know this. Anytime power fluctuates, the light toggles when the relay is energised. Didn't take into consideration while designing this setup.

[@carlosgarcialalicata]

@@SamirSogay you can use a latching relay instead

[@mgscyber]

Pls show the full diagram next time

[@Dennis-iz4lm]

"espipswitchtoggle.h" i can't find the library on the web...heeeeelp me plsss

[@SamirSogay]

The files are linked in the video description

[@jaipranesh6660]

Will u give me a circuit diagram

[@mani5004]

u wont get feed back and need to tell alexa the opposite of on and off

[@harshanimataraarachchige4040]

Industrial ESP32 PLC NORVI IIOT Features : Industrial Arduino ESP32 : IIOT with ESP32 Watch the video kzbin.info/www/bejne/hIfdhoqajtilfJY #esp32 #esp8266 #Arduino #IIoT #PLC #automation #Robotics

[@johnjeremih]

Share the diagram

[@SamirSogay]

There is a diagram in the video