How do I use MQTT with Raspberry Pi and ESP8266?

How do I use MQTT with Raspberry Pi and ESP8266?

  1. Step 1: What Is MQTT?
  2. Step 2: Installing the MQTT Broker on the Raspberry Pi.
  3. Step 3: Testing the Broker.
  4. Step 4: Setting Up the ESP8266 (Adafruit HUZZAH)
  5. Step 5: Programming the ESP8266.
  6. Step 6: Installing Python Client (paho-mqtt)
  7. Step 7: Python Client – Subscribing.
  8. Step 8: Communicating Between ESP8266 Devices.

Does ESP8266 support MQTT?

MQTT is a lightweight and flexible protocol to exchange IoT messages and deliver data. It dedicates to achieve a balance between flexibility and hardware/network resources for the IoT developer. ESP8266 provides a highly integrated Wi-Fi SoC solution.

How do I use ESP8266 as MQTT broker?

The connection and test of MQTT broker

  1. Please use Arduino IDE to upload the complete code to ESP8266 and open the serial monitor.
  2. Establish the connection between MQTT X client and MQTT broker, and send messages to ESP8266.
  3. View the messages ESP8266 received in the serial monitor.

How to connect NodeMCU with MQTT?

NodeMCU MQTT Code : On setup function we will try to connect to access point. Once we are connected to access point we will connect to given MQTT broker and subscribe to “/ic/to/nm/sd/” channel. Messages published to this channel will be printed on our serial console.

Can ESP8266 work with Raspberry Pi?

ESP8266 boards are pretty neat, but if you just bought one (And why wouldn’t you for only $5?) and have realized that you don’t have any obvious means (3.3V TTL USB serial device) to communicate with it, you can talk to it directly with a Raspberry Pi. Both use 3.3V signaling, so no level converting is required.


Does MQTT use TCP or UDP? MQTT uses TCP. Due to ordering requirements MQTT over UDP is not possible.

What is MQTT and how it works?

MQTT is a publish/subscribe protocol that allows edge-of-network devices to publish to a broker. Clients connect to this broker, which then mediates communication between the two devices. When another client publishes a message on a subscribed topic, the broker forwards the message to any client that has subscribed.

Is MQTT a protocol?

The MQTT protocol is the de-facto standard for IoT messaging. Standardized by OASIS and ISO, MQTT publish/subscribe protocol provides a scalable and reliable way to connect devices over the Internet. Today, MQTT is used by many companies to connect millions of devices to the Internet.

What is the difference between Raspberry Pi and NodeMCU?

All the three platforms have their own pros and cons, and depending on what the user prioritizes- speed, power consumption or ease of connectivity, any of them can be used. The Raspberry pi is better at ‘talking’ to the web, while the Arduino and NodeMCU are better at ‘real time’ applications.

Why does MQTT work with Arduino ESP8266?

It is due to the client.loop at the loop of arduino. Everytime the client.loop is running, it check any data require to publish or any receive data from subscribe. It just like a polling mechanism to check data by the program. I add delay (200) at the main loop, then the traffic drop significantly and the subscribe data can receive more reliably.

How to establish MQTT communication with Arduino 5V?

Today I come across a library called WiFiEsp, it has similar footprints of Arduino WiFi library, and it can work with PubSubClient. This post deals with how to utilize both PubSubClient and WifiEsp libraries to establish MQTT communication with an MQTT server. I powered ESP8266 directly from my Arduino’s 5V.

Is the MQTT protocol suitable for a Raspberry Pi?

Therefore a machine to machine (M2M) communication protocol is needed. That is what MQTT is. MQTT is a light messaging transport protocol based on publish/subscribe messaging and works on top of TCP/IP. Therefore the protocol is suitable for microcontrollers like the Arduino, ESP8266, ESP32 or Raspberry Pi.

Can you use ESP8266 on an Arduino 5V?

I powered ESP8266 directly from my Arduino’s 5V. You shouldn’t do that, it may damage the wifi module as it deals with 3.3v. This wifi module need more current than Arduino’s 3.3v pin can provide, so connecting Arduino 3.3v to Wifi module will not work.