The project is an upgrade of the telegram_esp32 project. The purpose of the project is to configure an MQTT broker on Raspberry to initially manage an Esp32-Cam surveillance camera. Later other functions can be configured or other devices connected via mqtt.

Below you will find a logical scheme of operation.

Remember that you can configure the MQTT broker not necessarily on a Raspberry but also on a normal PC.

• 1 : To configure an MQTT broker on our raspberry you can install mosquitto by following the multiple online guides (eg : https://www.ev3dev.org/docs/tutorials/sending-and-receiving-messages-with-mqtt/). However, I summarize below the only three necessary steps:

  sudo apt update && sudo apt upgrade
  

  sudo apt-get install mosquitto
  

  You can check if it is working by using the following command:

  systemctl status mosquitto
  

  or

  sudo service mosquitto status
  

  Remember that if you want to use the MQTT broker only locally without exposing it to the network you don't need to set up authentication, so just run the commands above. However, if you still want to set up authentication on the broker or want to expose your ip address for remote access then follow the online guides like this: https://randomnerdtutorials.com/how-to-install-mosquitto-broker-on-raspberry-pi/, or official documentation: https://mosquitto.org/documentation/authentication-methods/.

  If you don't already know the ip address of your Raspberry (or pc) you can see it using the following command. You will need it later to connect to the broker from client devices such as the Esp32.

  hostname -I
  

  or

  ifconfig