Excellent Debashish. Will try this and update. Thanks for the wonderful project. Keep up the good work.

Nice Video Debashish, however You could most likely ommit the level shifter. Most of these relay boards do have a jumper "JD-VCC - VCC". If You open it, You can apply 5V to the "JD-VCC" pin which powers the secondary side of the optocouplers as well as the solenoids of the relays. And You can attach 3.3V to the other VCC pin (either one as they are connected to each other) for the logic part.

Thanks for another great video

whether I can control this relay from another world. I appreciate your work.thank's for share..

Thank you!

Wow thanks ... I was looking for something like this... I m making the project in Python..😀

Am watching cod. Very big one amazing your work

can you add the WiFi + MQTT manager to your code , so that its easy to configure it without entering the credentials during compile and upload

In a reply to a comment here, you mentioned that the code has been converted to ESPHome. So does that mean I could follow the wiring in this video and it would run with the PCF8574 component on ESPHome?

I think you do not need PCF8547 and voltage level shifter, since ESP has enough pins and you just have to remove JD-VCC jumper, connect 3.3 from esp to vcc and 5v to JD it will be optically isolated. From datasheet: It is sometimes possible to use this relay boards with 3.3V signals, if the JD-VCC (Relay Power) is provided from a +5V supply and the VCC to JD-VCC jumper is removed. That 5V relay supply could be totally isolated from the 3.3V device, or have a common ground if opto-isolation is not needed. If used with isolated 3.3V signals, VCC (To the input of the opto-isolator, next to the IN pins) should be connected to the 3.3V device's +3.3V supply.

Good

Hi, how to connect 16 relay ?

Why do we need a 3.3V to 5V level shifter? I was reviewing the datasheet of the PCF and it says 2.5V to 6V

Can you spin up a simple project for 4 relays directly operated on the ESP8266 portpins and if possible with a local switch for controlling these relays , if WiFi fails.

"This entity does not have a unique ID, therefore its settings cannot be managed from the UI." I get this error on home assistant. I fixed it by adding the text below in the configuration.yaml file and the device appeared. Hope this helps someone and thanks for your efforts in the project. homeassistant: customize: !include customize.yaml

why are you using level shifter , is it necessary

Hello, where is the yaml file for home assistant ?

Solenoid relay's power build-up and release (thousands of watt) will be causing it to restart your esp8266.

Is there a way to add physical momentary bush button to toggle each relay using gpio or via i2c?

Hi do you have or thinking of making the same setup for a raspberry zero. nice video

Hello sir. Very nice tutorial. Can you please do the same project tutorial with micropython program??

why didn't you enter an example code?

Sir, i wanna ask..... your schematic can used at Blynk ??

Hello, I'm from Brazil, I would like to know how to customize the html that is encoded.

Amigo. Me podrias hacer el favor de colaborarme con la integracion del esp8266 en home asistant. Instale el adons mqtt y la configuracion yaml y el programa en el esp. En el ide sale mqtt conectado pero no logro hacer

Thanks for this great video , can you please fix links for components in github readme file

Do you really need PCF8574 to control 8 relays? Doesn't ESP8266 have enough pins that are not used during boot-up process to be connected directly to relay module?

Bro, if any other DIY with 16 relay channel + PCF8575, please share bro .. respect

please make a “PROGRAMMING" video on “ARDUINO UNO with ESP8266 $ 8 CHANNEL RELAYS" and control by Android phone....🙏🙏🙏

please Make a project on "ARDUINO UNO with ESP8266 & 8 CHANNEL RELAYS" and program it..... 🙏🙏🙏🙏🙏

Ah se fossem esses os preços no Brasil...

Any new for esp32 to 74HC595D 16 channel relay with rainmaker code?