![\"MicroPython](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/12\/mqtt-micropython-thumbnail.jpg?resize=1200%2C675&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nNote<\/strong>: this tutorial is compatible with both the ESP32 and ESP8266<\/span> development boards. <\/em><\/p>\n\n\n\n Before continuing with this tutorial, make sure you complete the following prerequisites:<\/p>\n\n\n\n To program the ESP32 and ESP8266 with MicroPython, we use uPyCraft IDE as a programming environment. Follow the next tutorials to install uPyCraft IDE and flash MicroPython firmware on your board:<\/p>\n\n\n\n To use MQTT, you need a broker. We’ll be using Mosquitto broker<\/a> installed on a Raspberry Pi. Read How to Install Mosquitto Broker on Raspberry Pi<\/a>.<\/p>\n\n\n\n If you’re not familiar with MQTT make sure you read our introductory tutorial: What is MQTT and How It Works<\/a><\/p>\n\n\n\n For this tutorial you need two ESP32 or two ESP8266 boards:<\/p>\n\n\n\n You also need a Raspberry Pi and the following accessories:<\/p>\n\n\n\n You can use the preceding links or go directly to MakerAdvisor.com\/tools<\/a> to find all the parts for your projects at the best price!<\/p> Here\u2019s a high-level overview of the project we\u2019ll build:<\/p>\n\n\n Let\u2019s start by preparing ESP#1:<\/p>\n\n\n\n To use MQTT with the ESP32\/ESP8266 and MicroPython, you need to install the umqttsimple<\/em> library.<\/p>\n\n\n\n 1.<\/strong> Create a new file by pressing the New File<\/strong> button.<\/p>\n\n\n 2.<\/strong> Copy the umqttsimple<\/em> library code into it. You can access the umqttsimple<\/em> library code in the following link:<\/p>\n\n\n\n 3.<\/strong> Save the file by pressing the Save<\/strong> button.<\/p>\n\n\n 4.<\/strong> Call this new file \u201cumqttsimple.py<\/strong>\u201d and press ok<\/strong>.<\/p>\n\n\n 5.<\/strong> Click the Download and Run<\/strong> button.<\/p>\n\n\n 6.<\/strong> The file should be saved on the device<\/em> folder with the name \u201cumqttsimple.py<\/strong>\u201d as highlighted in the figure below.<\/p>\n\n\n Now, you can use the library functionalities in your code by importing the library.<\/p>\n\n\n\n Open the boot.py<\/em> file and copy the following code to ESP#1.<\/p>\n\n\n View raw code<\/a><\/p>\n\n\n\n You need to import all the following libraries:<\/p>\n\n\n\n Set the debug to None and activate the garbage collector.<\/p>\n\n\n\n In the following variables, you need to enter your network credentials, your broker IP address, the broker username and corresponding password.<\/p>\n\n\n\n For example, our broker IP address is: 192.168.1.144.<\/p>\n\n\n\nPrerequisites<\/h2>\n\n\n\n
MicroPython firmware<\/h3>\n\n\n\n
\n
MQTT Broker<\/h3>\n\n\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/01\/mosquitto-broker.png?resize=200%2C197&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nParts Required<\/h3>\n\n\n\n
\n
\n
![](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2017\/10\/header-200.png?w=1200&quality=100&strip=all&ssl=1\")
<\/a><\/p>\n\n\n\nProject Overview<\/h2>\n\n\n\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/12\/MQTT-Diagram.png?resize=750%2C329&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\n
Preparing ESP#1<\/h2>\n\n\n\n
\n
Importing umqttsimple library<\/h3>\n\n\n\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/10\/uPycraft-ide-tools-menu-new-file.png?resize=135%2C41&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/10\/uPycraft-ide-tools-menu-save-file.png?resize=142%2C47&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/12\/import-umqttsimple-library.png?resize=750%2C305&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/10\/uPycraft-ide-tools-menu-download-and-run.png?resize=238%2C45&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\n![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/12\/umqttsimple-library-installed.png?resize=750%2C468&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nboot.py<\/em><\/h3>\n\n\n\n
# Complete project details at https:\/\/RandomNerdTutorials.com\/micropython-programming-with-esp32-and-esp8266\/\n\nimport time\nfrom umqttsimple import MQTTClient\nimport ubinascii\nimport machine\nimport micropython\nimport network\nimport esp\nesp.osdebug(None)\nimport gc\ngc.collect()\n\nssid = 'REPLACE_WITH_YOUR_SSID'\npassword = 'REPLACE_WITH_YOUR_PASSWORD'\nmqtt_server = 'REPLACE_WITH_YOUR_MQTT_BROKER_IP'\nmqtt_user = 'REPLACE_WITH_YOUR_MQTT_USERNAME'\nmqtt_pass = 'REPLACE_WITH_YOUR_MQTT_PASSWORD'\n\n#EXAMPLE IP ADDRESS\n#mqtt_server = '192.168.1.144'\nclient_id = ubinascii.hexlify(machine.unique_id())\ntopic_sub = b'notification'\ntopic_pub = b'hello'\n\nlast_message = 0\nmessage_interval = 5\ncounter = 0\n\nstation = network.WLAN(network.STA_IF)\n\nstation.active(True)\nstation.connect(ssid, password)\n\nwhile station.isconnected() == False:\n pass\n\nprint('Connection successful')\nprint(station.ifconfig())\n<\/code><\/pre>\n\tHow the Code Works<\/h3>\n\n\n\n
import time\nfrom umqttsimple import MQTTClient\nimport ubinascii\nimport machine\nimport micropython\nimport network\nimport esp<\/code><\/pre>\n\n\n\nesp.osdebug(None)\nimport gc\ngc.collect()<\/code><\/pre>\n\n\n\nssid = 'REPLACE_WITH_YOUR_SSID'\npassword = 'REPLACE_WITH_YOUR_PASSWORD'\nmqtt_server = 'REPLACE_WITH_YOUR_MQTT_BROKER_IP'\nmqtt_user = 'REPLACE_WITH_YOUR_MQTT_USERNAME'\nmqtt_pass = 'REPLACE_WITH_YOUR_MQTT_PASSWORD'<\/code><\/pre>\n\n\n\n