CONFIGURATION¶

To facilitate the configuration of the software, we provide a configuration file that can be easily modified. This file is located in the config directory of the software installation.

GATEWAY NODE EXAMPLE

#pragma once

/* Node Information */
#define GATEWAY          // for main node
// #define LEAFNODE        // for sensor node

#define NODE_ID 100      // GATEWAY should be 100
// for LEAFNODE: 1, 2, 3, 4
// #define NODE_ID 1
// #define NODE_ID 2
// #define NODE_ID 3
// #define NODE_ID 4

#define NUM_NODES 4 // Total number of nodes in the network

/* WiFi Credentials */
#define WIFI_SSID "CSW@CEE"
#define WIFI_PASSWORD "88888888"

/* MQTT Configurations */
#define MQTT_CLIENT_ID      "GATEWAY"
// #define MQTT_CLIENT_ID      "LEAFNODE1"
// #define MQTT_CLIENT_ID      "LEAFNODE2"
// #define MQTT_CLIENT_ID      "LEAFNODE3"
// #define MQTT_CLIENT_ID      "LEAFNODE4"

#define MQTT_BROKER_ADDRESS "8.222.194.160"
#define MQTT_BROKER_PORT    1883
#define MQTT_USERNAME       "ArduinoNode"
#define MQTT_PASSWORD       "Arduino123"
#define MQTT_TOPIC_PUB      "ArduinoNode/node"
#define MQTT_TOPIC_SUB      "ArduinoNode/server"

LEAFNODE EXAMPLE

#pragma once

/* Node Information */
#define GATEWAY          // for main node
// #define LEAFNODE        // for sensor node

#define NODE_ID 100      // GATEWAY should be 100
// for LEAFNODE: 1, 2, 3, 4
// #define NODE_ID 1
// #define NODE_ID 2
// #define NODE_ID 3
// #define NODE_ID 4

#define NUM_NODES 4 // Total number of nodes in the network

/* WiFi Credentials */
#define WIFI_SSID "CSW@CEE"
#define WIFI_PASSWORD "88888888"

/* MQTT Configurations */
#define MQTT_CLIENT_ID      "GATEWAY"
// #define MQTT_CLIENT_ID      "LEAFNODE1"
// #define MQTT_CLIENT_ID      "LEAFNODE2"
// #define MQTT_CLIENT_ID      "LEAFNODE3"
// #define MQTT_CLIENT_ID      "LEAFNODE4"

#define MQTT_BROKER_ADDRESS "8.222.194.160"
#define MQTT_BROKER_PORT    1883
#define MQTT_USERNAME       "ArduinoNode"
#define MQTT_PASSWORD       "Arduino123"
#define MQTT_TOPIC_PUB      "ArduinoNode/node"
#define MQTT_TOPIC_SUB      "ArduinoNode/server"

As shown in the code snippet above, the configuration file includes node information, WiFi credentials, and MQTT configurations.

Node Modes¶

For wireless sensor networks, there are two concepts: gateway node (GATEWAY) and sensor node (LEAFNODE). Correspondingly, we have two macros to define the node type, enabling conditional compilation in the code.

Node ID¶

Each node has a unique ID, with the gateway node having an ID of 100 (different from the sensor nodes), and the sensor nodes numbered from 1 to NUM_NODES. You can set the current node's ID by modifying the NODE_ID macro.

WiFi Credentials¶

Each node needs to connect to a WiFi network, so you need to provide the WiFi SSID and password. You can set your WiFi credentials by modifying the WIFI_SSID and WIFI_PASSWORD macros in the configuration file.

MQTT Configurations¶

Each node needs to connect to an MQTT server, so you need to provide the relevant MQTT configurations. You can modify the following macros in the configuration file:

• MQTT_CLIENT_ID: Set the MQTT client ID for the current node. The gateway node is set to GATEWAY, and sensor nodes are set to LEAFNODE1, LEAFNODE2, etc.
• MQTT_BROKER_ADDRESS: Set the address of the MQTT broker. The default address in the code can be used.
• MQTT_BROKER_PORT: Set the port of the MQTT broker, typically 1883. This is the default port for MQTT.
• MQTT_USERNAME: Set the username for MQTT authentication. The default username in the code can be used.
• MQTT_PASSWORD: Set the password for MQTT authentication. The default password in the code can be used.
• MQTT_TOPIC_PUB: Set the topic for publishing messages. The default topic in the code can be used.
• MQTT_TOPIC_SUB: Set the topic for subscribing to messages. The default topic in the code can be used.