🌐 qubip-mqtt-linux-client-openssl

This program tries to connect to an MQTT broker via TLS v1.3 encryption.

This example demonstrates how to establish a secure connection to an MQTT broker using TLS v1.3 encryption.

It subsequently establishes a Modbus TCP connection to a PLC (or any Modbus TCP master), reads a holding register, and transmits its value to the MQTT broker. The register is then incremented by one, updated on the PLC, and this cycle repeats continuously.

🛠️ To Compile:

Clone the Repository 📁

git clone --recurse-submodules https://github.com/smartfactoryrepo/qubip-mqtt-linux-client-openssl.git

Give Execute Permissions 🔑

cd openssl-3.2.2
chmod +x Configure

Configure OpenSSL ⚙️

./Configure --prefix=/usr/local/ssl --openssldir=/usr/local/ssl '-Wl,-rpath,$(LIBRPATH)'

Build OpenSSL 🔨

make -j8

Return to Main Directory and Compile 📦

cd ..
make -j8

You're all set! 🚀

🛠️ Command to Execute the Program

🚀 How to Run

./main --ca-cert cert/ca.crt --client-cert cert/client.crt --client-key cert/client.key --modbus-ip 192.168.168.134 --modbus-port 5002 --modbus-register 10 --mqtt-broker 192.168.101.63 --mqtt-port 1883 --mqtt-device-name LINUX_DEVICE --mqtt-topic 2023/test

📝 Parameter Description

• --ca-cert cert/ca.crt

  • Certificate Authority (CA) Certificate 🛡️: Specifies the path to the CA certificate used to verify the 🔒 TLS connection.

• --client-cert cert/client.crt

  • Client Certificate 📜: Specifies the path to the client certificate, used to authenticate the device 📱 to the server.

• --client-key cert/client.key

  • Client Private Key 🔑: Specifies the path to the private key associated with the client certificate, used to establish a secure 🔒 connection.

• --modbus-ip 192.168.168.134

  • Modbus IP Address 🌐: IP address of the Modbus server to connect to for reading 📖 or writing ✍️ registers.

• --modbus-port 5002

  • Modbus Port 🔌: Port number of the Modbus server to use for the connection.

• --modbus-register 10

  • Modbus Register 📋: Register number to read 📖 or write ✍️ during communication.

• --mqtt-broker 192.168.101.63

  • MQTT Broker 📡: IP address of the MQTT broker to which the device connects to publish 📤 or subscribe to messages.

• --mqtt-port 1883

  • MQTT Port 🔌: Port number used to connect to the MQTT broker.

• --mqtt-device-name LINUX_DEVICE

  • MQTT Device Name 📛: Identifier name of the device used for MQTT communications.

• --mqtt-topic 2023/test

  • MQTT Topic 📝: MQTT topic where the device publishes data 📊. It can also be used for subscriptions or notifications 🔔.