Your series of videos on the ESP8266 is incredibly helpful and informative, thanks so much for taking the time to make them! Your pacing and explanations are perfect.

One of the best introductions into MQTT ever seen. Love the accent.

Particularly like your teaching of practical usage, versus blinking LED's. A channel for the professional versus the student/hobbyist. Although easily digestible by both. We run MQTT servers and you're spot on. Great job, very useful, keep up the outstanding work.

You are a great teacher, with an AMAZING sense of humor! Thank you.

best youtube channel ever! great diagrams and a catchy voice. thank you for the esp8266 videos!

Already 7 years ago... and still very enjoyable. I needed a refresh... so what else is there to do then watch these videos!

Hi Andreas ! Simple, linear, pro, crystal clear. Thanks a lot for everythingM

Andreas, you are a great communicator. Love your videos. Greetings from Canada!

This is a killer app! I spent days trying to accomplish the same task described in this video but with the use of WebSockets with no success. This took me less than 30 min to get set up and working!

Really good intro to MQTT, looking forward to checking out more ESP8266 stuff. Thank you very much Andreas

Very nice and to the point tutorial Andreas.. I like you accent. Very clear and very understandable.

This was very clear, and a great choice of libraries - thank you!

Andreas - this old video was of great help. I am trying to understand the workings of Adafruit.io. Thanks!

He Andreas, great tutorial.....yesterday evening I was able to replicate the setup......worked in one go. See a lot of other interesting video's on you channel . So thank you for getting me up to speed with this. Up to my first IoT project...

MQTT made simple! Thanks again :) Did a small modification of your blink example, so that it sends a MQTT "command" ON/OFF every 3 seconds to adafruit, which it still subscribes to. So it now needs my wifi, internet connection and the adafruit service to be up and running in order to blink the LED :) Fun to play with! Next step is to make it IOTAppStory compatible :)

Very helpful totorial sir. I am already build a project with adafruit mqtt +ifttt+google assistant voice command.

Your videos are priceless! Thanks for all this knowledge :)

Congratulations from Brazil! Very good!

Hey Andreas thanks for the video, what was the name of the esp you used in this video?? I can’t catched up well. The luminiscense sensor is attached to the board??

Dave Jones reference made me laugh. Good video Andreas, appreciated.

I'm glad you number these! Makes keeping notes much easier... I signed up for the Adafruit beta, and tried to see your feeds from online. Evidently I haven't figured out how to do that yet... Adafruit foiled me at every turn. CAN we see your dashboard? Do I misunderstand, or is it just limited to MQTT traffic through devices (which I haven't, yet). I've tried the obvious strings that you've supplied in the video, and various searches on project and user name. Maybe my account is not configured correctly?

Very nice , great video . As old game coder here , i was thinking your were about to explain how to do NAT punch through with a ESP. that would have been very cool . That might have to be a reason for me to do a bit of game code again .

Thank you.Your video was informative. I like the accent neat.

Another nice video, thank you for that Andreas. Und jetzt schnell ein ESP8266 Modul suchen / kaufen und losgehen ;)

Great tutorial!

Thanks Andreas as usual. Looking forward to more videos. By the way, for local communication, can we use ESP8266 itself as MQTT broker?

great tutorial on mqtt, but most of all, the humour cracked me up :))

Mindblowing

The humour :) Subscribed. Also the information was superb. Thank you

thank you very much.. Vielen Dank!!

Hi Andreas, I created an account and got started. Am I correct in thinking that I can subscribe to sensorsiot/feeds/luminosity and check out/ operate your light? I had a quick attempt without success. I will go to learning.adafruit and RTFM. Many thanks for an excellent introduction to MQTT. Alan

I keep going back to the Spiess LIbrary to learn more. Thanks for building a great one. In this video, you say that "MQTT transfers all values as characters". I've read that one of the MQTT advantages is that MQTT is data agnostic for M-2-M communications. Transfering a 16-bit variable (e.g. 65565) would require 5 bytes as characters, but only 2 bytes as binary. Could you please comment on why the MQTT standard is character based? Thanks.

first thank you second , i wanna create 2 way switch with adafruit i mean in one way you can turn on/off the led(relay) by adafruit io and , in another way you can turn on/off the led(relay) by using a push button

Great video Andreas! Luv the accent! Have a question. Is there any way one could create a simple web interface on the ESP8266 which would be password protected but would allow to enter the WiFi and MQTT usernames and passwords dynamically, and not have them hardcoded?

I've been struggling with this topic. Why didn't I think to check here first DOH😂😂

How would you go about retrieving the last known value for the Command ("On/off") feed? Say you want your lamp to immediately be on or off depending on the position of the button in the Adafruit.io Dashboard. Is there a way to do this in the setup() function? I'm asking because everything I've seen until now requires you to change the state/value of the feed before it gives you the first value -- so say the dashboard button is "Off", well upon running the code, your mqtt subscription will not give you a value until you switch the button in the Dashboard to "On", then it will work ok. But I'm interested in the last known value for that feed upon initialization.

Hi Andreas, based on you great input, I do now have more a less a platform to connect different sensors and interact with them. Since yesterday there where some sudden reboots when MQTT send/receive and an interrupt on an GPIO happened. Really bad to reproduce but happen from time to time and reboot the ESP. I found more or less by accident this really important add on in function declaration that now avoid any interrupt conflict. ICACHE_RAM_ATTR. You can google on it. For example I modify the MQTT callback like this: "void ICACHE_RAM_ATTR mqtt_callback(char* topic, byte* payload, unsigned int length) {.....}" Maybe you have seen similar and wondering what happened.

Hey Bro, I implemented a websocket client in node mcu which connects to SAP HANA websocket.It can do a bidirection communication.But after sometime,node mcu client is dead without notification.And also some time the message is not delivered to my node MCU client.Iam in the last phase of the project.Do you think ,i need to switch to MQTT for reliable communication.Please suggest.

Hi Andreas! very good video thanks a lot have question using ESP8266 and io.adafruit mqtt I’am using esp8266 with solar power batterie, publishing mqtt every 5mn or so, then going in sleep mode for saving batterie (thanks Andreas). If in mean time button change ON or OFF, when ESP8266 connect next time for publishing it can’t get the subscriptions change ON/OFF? Or other way to solve it, would it be able to read any value at each time esp8266 is connect to mqtt server. do you have a solution? Thanks Philippe

Very instructional video! In my case, I prefer to use DDNS and create a DMZ on my Firewall.

Hi Andreas, quick question on MQTT and ESP8266. Is it possible to have 2(two) brokers running on one ESP8266? local broker running on a raspberry pi and the other from cloud mqtt?

Andreas this is the guy with italian accent: You are a genius , you have solved my problem. Thanks a lot There is a problem . I don't find MQTT.h header file no such file or directory. what do we have to do ? Thanks a lot

thank your video much sir please help me when I open serial monitor, It issue some word : Not authorized to connect How can I solve this problem ?

Hi, I am having the following problem and am desperatly looking for help: I run an Nodemcu ESP8266 12E board, programmed in Arduino. I would like to connect three input buttons to D6, D7 an D8. Each button is linked to a separate pullup-resistor of 10K Ohm. The button on D6 is working fine, if connected alone. But if I connect the others on the circuit board, they do not work. Also I can see that the button on D6 is triggering the input on D7. First questions: Are 10K Ohn the right choice when running more than one pull-up resistor? Are D6 (GPIO 1512), 7 (GPIO 1513) and 8 (GPIO 15) GPIO I can use for inputs? Will try to add a picture of my circuit and example code as soon as possible. Thank you in advance for helping!

Thanks for your good video :) I think TLS is really necessary for MQTT. But some MQTT client libraries such as pubsub library doesn't support TLS. I need a library to work on esp8266 and can use it in arduino ide. do you know any of them?

Didnt know that my router protects my "wifey" :) JK, nice video.!

Thanks for a good inspiration. I currently working on a similar project and have much help from you videos. My project is based on Adafruit MQTT Library ESP8266 Example and including #include "Adafruit_MQTT.h". #include "Adafruit_MQTT_Client.h". What I do not understand is how it should be possible for the main loop to to more than sleep. Assume I have a readSubscription every 5 sek while ((subscription = mqtt.readSubscription(5000))) {... the main loop does nothing in the sleep time. Assume, I will read a motion sensor and interrupt a MQTT message as soon interrupt happens, how is that possible? Currently I inly enter my motionSensorAnalogReadingThing every 5000 ms, independen where I put it in main loop(). Thanks for your engeneering analytics! /E

Do not worry Sir, your explanation is very very good. I just saying that seems a little too much code, because, if you have somthing that "detetects ligth" and One "light" a side...makes sense (to me) that; if you put them somehow together, you may detect if works or not...i'm i right?....jijijiji

Hi Andreas, I have installed libraries, ESP8266 and your sample code; I then get error when compiling "Error compiling for board Generic ESP8266 Module". I have tried compiling for another board i.e. Hazzah and still the same error. Any ideas please ?

Nice tutorial. sir i am trying to establish ssl connection between esp8266 client and MQTT broker, but don't know how to do that. any help in this regard will be appreciated.

Hi Andreas, thank you for this wonderfull video!! However I can´t find the adafruit.io in Playstore. Do you use another one? I need it to use it in an Android device. Another thing, I try the sketch you publish in GitHub, but it don´t work properly. Any possibility to have the complete sketch you use in the video??? (this is based in pubsubclient library...) I am developing an MQTT app which can send topics, call back and send SMS to the user. Thank you for your help. Have a nice day. With best regards, Pedro

Hi, nice video. Thanks. Further can you suggest a resource where I can lean MQTT-SN ? Thanks in advance.

very nice video.one question: what is the #include "credentials_Adafruit_IO.h" file?

I have made a block in adafruit mqtt in which the value differ from 1 to 10 . And i want to read this as integer in nodemcu i.e in arduino IDE while compiling...i mean i want to set it as ....when the value will be 1 in the feed then it on LED 1 when value in broker will be 2 then ON LED2 and so on.... Please help... How to get it as integer value

dont we have a chance to access from internet to our esp without anay other webpage? i want to get connected to my esp but dont want to spend time in adafruit's page. is there any chance to use mqtt in other ways?

There is any way to read a value from broker again? I am having some Dropped Packeges ... so i want to my device read the topics every 5 seconds!

Hi Andreas, nice video, very detail information. i tried this it worked well. One issue i am facing is my nodemcu does not respond after 10-15 minutes. it seems it is dead. I tried following code too WiFi.setSleepMode(WIFI_NONE_SLEEP) but it seems its not working. It works only for 10 mins after restart. can you suggest something to keep nodemcu alive forever. thanks in advance

Hi Andrea. What is the diffrence between adafruit io library and mqtt library ?

@0:45 It's like "your router firewall protects your wife from other people surfing the internet".

Hi, I have another question please. Can anyone please help on how to install Mosquitto (or any other MQTT service) on 64 bit PC with Windows 8 or 10 ? I have tried the Windows 7 method available on the Internet, but it does not work on 64 bit PC with Windows 8. Thanks.

Grüezi Andreas is your account still working and public (with account)? I could connect (node-red green), but got this errors: MQTT ERROR: jsail 212.51.158.172 SUBSCRIBE sensorsiot/feeds/command rejected, resource not available or not authorized MQTT ERROR: jsail 212.51.158.172 SUBSCRIBE sensorsiot/feeds/clientstatus rejected, resource not available or not authorized

how do you make your videos or which software do you use ?

Can you help me out with something? I have an Arduino which is connected to an analog sensor. The values of the sensor are converted into a number we can understand like degrees celcius. I am sending that number to ESP8266 through Serial port. I am hosting a webpage on my local network. When a client(like my desktop) connects to the ESP8266, I get the webpage on my browser. On the page, the number from the analog sensor is shown. To update the number I use this:- I have used this in the HEAD of the webpage I am sending. Due to this, the page refreshes after 5 seconds so that the client requests again, and ESP8266 sends the full webpage again. I want that the whole page does not refresh, just the the number on the webpage. Do you know any method to do this?

Hi, I'm looking for something similar but using a Wifly sheild for the Arduino but have had no luck, the shield connects to the internet but does not connect through mqtt to adafruit.io.

I'm working with Adafruit_mqtt library, you have make the feeds on your own at Adafruit.io....Don't know about pubsubClient

will it work if internet gets disconnected but WiFi router switched on ?

Do you know how to use the ESP8266 together with an Arduino Board and be able to connect trough MQTT? It looks like people only knows to use the ESP8266 alone when it comes to MQTT, for MQTT connections I still haven't saw anyone that have used an ESP8266 as a WiFi module only with sketches uploaded to the Arduino board instead...!

yo no se mucho pero si tienes una luz y algo que detecta luz, ...para detectar si funciona le detector pones la luz enfrente, y si cambia lo detecta, cierto? :-)

Hi!, i've got a ask.. How can i do to see "My Feeds" in Adafruit.io?

Hi (sorry i am a newbie) I tried to do it through Adafruit MQTT, installed all 3 libraries and changed values on ESP_MQTT_PUBSUB sketch.Using a wemos d1 mini with a photolight sensor. i could not include the library "credentials_Adafruit_IO.h" library is not found when compiled and couldn't find it in any of the 3 libraries. i disabled it to try and sketch runs, it connects to wifi and initially connects/measures to MQTT then stays mostly trying to reconnect. on the IO.Adafruit site on the opened account, it didn't get the feed to show up. current version is different. not sure if need to add the feed somehow or should be recognized when the sketch loaded with right credentials. also not clear on the "credential_adafruit_IO" library missing. really appreciate if given a clue what i am missing.

Sir plz tell me how to install mqtt library

The joke at 2:35 cracked me up! Esp8266 has no wpa2 for hosting the web server right? So would have a secure log in page when using https and a password?

why the adfruit gives this internal server error

I am getting an error esptool.FatalError.Falied to connect to Esp8266:Time out waiting for packet header

How does MQTT create connection with remote device without knowing its IP?

I am getting SSID (20): Labhansh Photography Passphrase (9): thakkar69 BSSID set: 0 Attempting MQTT connection... failed, rc=-2 try again in 5 seconds Measure Attempting MQTT connection... failed, rc=-2 try again in 5 seconds Please help!

error rc=7 could mean?

what is broker?

It's easy, but more expensive

first : I use mosquitto MQTT local offline MQTT. and it havn't a username and key. second : in my code WiFi.begin(ssid, password); and WiFi.status() dosn't work. this is my code: //ItKindaWorks - Creative Commons 2016 //github.com/ItKindaWorks // //Requires PubSubClient found here: github.com/knolleary/pubsubclient // //ESP8266 Simple MQTT light controller #include #include //EDIT THESE LINES TO MATCH YOUR SETUP #define MQTT_SERVER "192.168.173.1" const char* ssid = "zed_2017"; const char* password = "zed__2017"; //LED on ESP8266 GPIO2 const int lightPin = 2; char* lightTopic = "topic"; //"/test/light1"; void callback(char* topic, byte* payload, unsigned int length); WiFiEspClient wifiClient; PubSubClient client(MQTT_SERVER, 1883, callback, wifiClient); void setup() { //initialize the light as an output and set to LOW (off) pinMode(lightPin, OUTPUT); digitalWrite(lightPin, LOW); //start the serial line for debugging Serial.begin(115200); delay(100); //start wifi subsystem Serial.println("Connecting to "); Serial.println(ssid); delay(1000); WiFi.begin(ssid, password); //attempt to connect to the WIFI network and then connect to the MQTT server reconnect(); //wait a bit before starting the main loop delay(2000); } void loop(){ //reconnect if connection is lost Serial.println("loop"); Serial.println(client.connected()); delay(1000); //Serial.println(WiFi.status()); //delay(1000); if (!client.connected() && WiFi.status() == 3) { Serial.println("reconnect avant"); delay(1000); reconnect(); } Serial.println("loop client avant"); delay(1000); //maintain MQTT connection client.loop(); //MUST delay to allow ESP8266 WIFI functions to run delay(10); } void callback(char* topic, byte* payload, unsigned int length) { //convert topic to string to make it easier to work with String topicStr = topic; //Print out some debugging info Serial.println("Callback update."); Serial.print("Topic: "); Serial.println(topicStr); //turn the light on if the payload is '1' and publish to the MQTT server a confirmation message if(payload[0] == '1'){ digitalWrite(lightPin, HIGH); client.publish("/test/confirm", "Light On"); } //turn the light off if the payload is '0' and publish to the MQTT server a confirmation message else if (payload[0] == '0'){ digitalWrite(lightPin, LOW); client.publish("/test/confirm", "Light Off"); } } void reconnect() { //attempt to connect to the wifi if connection is lost if(WiFi.status() != WL_CONNECTED){ //debug printing Serial.print("Connecting to _reconnect"); Serial.println(ssid); //loop while we wait for connection while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } //print out some more debug once connected Serial.println(""); Serial.println("WiFi connected"); Serial.println("IP address: "); Serial.println(WiFi.localIP()); } //make sure we are connected to WIFI before attemping to reconnect to MQTT if(WiFi.status() == WL_CONNECTED){ // Loop until we're reconnected to the MQTT server while (!client.connected()) { Serial.print("Attempting MQTT connection..."); // Generate client name based on MAC address and last 8 bits of microsecond counter String clientName; clientName += "esp8266-"; uint8_t mac[6]; WiFi.macAddress(mac); clientName += macToStr(mac); //if connected, subscribe to the topic(s) we want to be notified about if (client.connect((char*) clientName.c_str())) { Serial.print("\tMTQQ Connected"); client.subscribe(lightTopic); } //otherwise print failed for debugging else{Serial.println("\tFailed."); abort();} } } } //generate unique name from MAC addr String macToStr(const uint8_t* mac){ String result; for (int i = 0; i < 6; ++i) { result += String(mac[i], 16); if (i < 5){ result += ':'; } } return result; } AND the Out in moniteur serie it is : Connecting to zed_2017 Connecting to zed_2017 Connecting to zed_2017 Connecting to zed_2017 I don't understande what is the probleme? can U help me pliiiz

lumiNosity, not lumiosity. There is an "n" in there, and it is not silent when pronounced.