Merge pull request #41 from KomelT/topic-mqtt-option

added --mqtt-topic option to allow configuring which topic to subscribe to

README.md

@@ -74,6 +74,7 @@ My version of the map is available at https://meshtastic.liamcottle.net
 - not affiliated with meshtastic info
 - donate link
 - login/register to add nodes to the map manually
+
   - need to prevent spam
   - captcha for reg
   - limit how many nodes can be added from an account
@@ -159,14 +160,15 @@ node src/mqtt.js --help
 ```
 Meshtastic MQTT Collector
 
-  Collects and processes service envelopes from a Meshtastic MQTT server. 
+  Collects and processes service envelopes from a Meshtastic MQTT server.
 
 Options
 
   -h, --help                                    Display this usage guide.
   --mqtt-broker-url string                      MQTT Broker URL (e.g: mqtt://mqtt.meshtastic.org)
   --mqtt-username string                        MQTT Username (e.g: meshdev)
   --mqtt-password string                        MQTT Password (e.g: large4cats)
+  --mqtt-topic                                  MQTT Topic to subscribe to (e.g: msh/#)
   --collect-service-envelopes                   This option will save all received service envelopes to the database.
   --collect-text-messages                       This option will save all received text messages to the database.
   --collect-waypoints                           This option will save all received waypoints to the database.

src/mqtt.js

@@ -31,6 +31,11 @@ const optionsList = [
         type: String,
         description: "MQTT Password (e.g: large4cats)",
     },
+    {
+        name: "mqtt-topic",
+        type: String,
+        description: "MQTT Topic to subscribe to (e.g: msh/#)",
+    },
     {
         name: "collect-service-envelopes",
         type: Boolean,
@@ -108,6 +113,7 @@ if(options.help){
 const mqttBrokerUrl = options["mqtt-broker-url"] ?? "mqtt://mqtt.meshtastic.org";
 const mqttUsername = options["mqtt-username"] ?? "meshdev";
 const mqttPassword = options["mqtt-password"] ?? "large4cats";
+const mqttTopic = options["mqtt-topic"] ?? "#";
 const collectServiceEnvelopes = options["collect-service-envelopes"] ?? false;
 const collectPositions = options["collect-positions"] ?? false;
 const collectTextMessages = options["collect-text-messages"] ?? false;
@@ -269,7 +275,7 @@ function decrypt(packet) {
 
 // subscribe to everything when connected
 client.on("connect", () => {
-    client.subscribe("#");
+    client.subscribe(mqttTopic);
 });
 
 // handle message received