ESP8266 (NodeMcu) Raspberry Pi MQTT | ESP8266 Publish/Subscribe

This is the 3rd video of How to MQTT series. In this video, we will learn how to subscribe and publish MQTT messages using ESP8266 (NodeMcu). We will use the Raspberry pi as Local mosquitto MQTT broker which we created in the last video.
We will read the temperature and humidity values from a DHT11 sensor using Nodemcu and publish it on topic "data", raspberry pi will subscribe to that topic and receive that data. So this can also be considered as "Raspberry pi Esp8266 Wireless communication" or "NodeMcu Raspberry pi IoT".
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Video Tags:
ESP8266
Raspberry pi
MQTT
How to MQTT
How to esp8266 MQTT
Nodemcu
esp8266 publishing dht22 readings with mqtt to raspberry pi
esp8266 mqtt client
esp8266 mqtt tutorial
esp8266 mqtt example
esp8266 dht11 mqtt
esp8266 dht11 mqtt home assistant
nodemcu mqtt client
nodemcu mqtt home assistant
esp8266 raspberry pi wireless communication
esp8266 iot tutorial
esp8266 iot projects
esp8266 talking to raspberry pi
internet of things
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[@HighVoltages]

Watch How to use ESP8266 with MQTT broker on a cloud. kzbin.info/www/bejne/m4LZnXuBidGMeac

[@christophdittmer5331]

You already know youre getting the best when the indish accent starts.

[@HighVoltages]

:)

[@ZersoLP]

Some comments say the music is distracting but I think its fine. Instead you should get a better microphone to hear your voice clearer over the music. Great video!

[@chrisw1462]

You have a very strong accent, to an American, and the background music is just a little too loud. Together it makes listening very hard.

[@HighVoltages]

Yes i realised that too. I will improve in my upcoming videos.

[@tavreensalman9212]

Well done 👍👍👍

[@HighVoltages]

Thank you! Cheers!

[@JKFCV]

What is the fastest speed of communication? That is how many values per second can be transmitted?

[@DJosh-cs5vx]

Thanks

[@baseladams280]

What do need to do, if the Raspberry pi and the esp32 arr not on the same wifi? In other words, how subscribe Mqtt Messages over internet? Thank you for the video!

[@HighVoltages]

I will make this video in the coming days :)

[@bradlevan3121]

I’m using DS18b20 sensor on D2 (only pin that seems to work) & 128X32 i2c OLED to display Current temp on D1&D2. Can you assist with code? I can get each to work independently but not together. Great videos!

[@HighVoltages]

Sure, the problem you have is the sensor only works on D2 and because of that you cannot use multiple sensors ?

[@bradlevan3121]

High Voltages DS18b20 only works (shows correct temp) on D2 yes, if I put it on any other GPIO it says it’s -120degreesF. I guess the problem is I cannot add OLED to display current temp while seeing temp reading on MQTT from DS18b20

[@HighVoltages]

@@bradlevan3121 please email me the code so i can comment.

[@manalelh9660]

taaaannkkkks ttooo muuuuch bbrroooo

[@HighVoltages]

You are welcome

[@moshebensal7109]

Very interesting. It's not clear to me, why we need background music? This is very disturbing to me, and I'm sure many more people, Too bad.

[@HighVoltages]

Thank you for your feedback and i believe that music added with learning canhelp you learn better and i may be wrong. But if my audience finds it annoying, i will make videos wothout music. Thanks :)

[@chrisw1462]

Yes, just a little too loud, too.

[@HighVoltages]

@@chrisw1462 i will improve in the next videos, thank you for the feedback :)

[@abhirupbera804]

Sir, How to send one digital input and receive one digital output? Say, we have two esp8266 through adafruit broker. One esp digital input will make another esp digital output high and vice versa. Please help me out.

[@HighVoltages]

you can read input from one esp8266 and publish on a topic lets say "input" and the other esp will subscribe to same topic and then whenever the other esp will recieve any data, write a code to change the output.

[@abhirupbera804]

@@HighVoltages Sir, Please help with the code.

[@mommypotatottv]

is there a tuto of how to link the node mcu or the gateway with cloud

[@HighVoltages]

Here it is . kzbin.info/www/bejne/m4LZnXuBidGMeac

[@ezclap0379]

Allen Pan has 100 percent been here

[@Joshrp59]

Hi, is there a way to publish to MQTT with retained flag active from this MCU?

[@HighVoltages]

yes you can.

[@someonecooltech]

so esp8266 don't have to connect to WIFI?

[@HighVoltages]

you can connect both esp8266 and pi to the same WiFi or you can use Raspberry pi as an access point and esp8266 can connect to it, in both cases they are on same network but it can work without internet.

[@hayafatime8998]

Can we connect our local pi network to firebase to publish data?

[@HighVoltages]

Yes, we can. In the case of this tutorial, sensors are connected to a local broker i.e. Raspberry pi and raspberry pi can publish that data on firebase.

[@hayafatime8998]

@@HighVoltages thank you.. Can u plz make a video on that as well!

[@HighVoltages]

@@hayafatime8998 Sure i will in upcoming days.

[@tejaranganath9517]

Arduino: 1.8.13 (Windows Store 1.8.42.0) (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), dtr (aka nodemcu), 26 MHz, 40MHz, DOUT (compatible), 1MB (FS:64KB OTA:~470KB), 2, nonos-sdk 2.2.1+100 (190703), v2 Lower Memory, Disabled, None, Only Sketch, 115200" Multiple libraries were found for "ESP8266WiFi.h" Used: C:\Users\Puligilla\Documents\Arduino\libraries\ESP8266WiFi Not used: C:\Users\Puligilla\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.4\libraries\ESP8266WiFi In file included from C:\Users\Puligilla\Desktop\sketch_apr07a\sketch_apr07a.ino:1:0: C:\Users\Puligilla\Documents\Arduino\libraries\ESP8266WiFi\src/ESP8266WiFi.h:28:28: fatal error: wl_definitions.h: No such file or directory #include ^ compilation terminated. exit status 1 Error compiling for board Generic ESP8266 Module. This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences. i am getting these errors please help me sir

[@wajdibrahem7617]

the portal config won't open ! some one help me plz !

[@dsdridi5362]

hi , ican u help me ? my esp8266 dont reconnect to mqtt broker ( on node red raspberry pi ) after when the pi reboot .

[@HighVoltages]

Are you using reconnect function in your loop body ?

[@kuldipgami4442]

Raspberry pi send data to nodemcu via local or globall

[@HighVoltages]

Locally, but same code can be used for global transmission using any external mqtt cloud.

[@ennaiarindhal3141]

Bro can read flow sensor Data using esp8266 raspberry pi

[@HighVoltages]

Hello, Sorry your question is unclear but as far as i understand yes you can read flow sensor data using ESP8266.

[@ennaiarindhal3141]

Ok how can i do that?

[@MrBobWareham]

please please stop the music!!!

[@HighVoltages]

I will take care of it next time, sorry for this time :)

[@SepahEMahdi]

background music is too laud and pointless we cannot even hear you