MQTT at least talks to server, works in native and esp32

2025-12-21 02:02:23 +00:00 · 2021-04-03 14:54:10 +08:00
parent 2acde3333c
commit dcf64dfacd
16 changed files with 267 additions and 46 deletions
--- a/src/mqtt/MQTT.cpp
+++ b/src/mqtt/MQTT.cpp
@@ -0,0 +1,76 @@
+#include "MQTT.h"
+#include "NodeDB.h"
+#include <WiFi.h>
+#include <assert.h>
+
+MQTT *mqtt;
+
+String statusTopic = "mstat/";
+String packetTopic = "mesh/";
+
+void mqttCallback(char *topic, byte *payload, unsigned int length)
+{
+    DEBUG_MSG("MQTT topic %s\n", topic);
+
+    // After parsing ServiceEnvelope
+    // FIXME - make sure to free both strings and the MeshPacket
+}
+
+void mqttInit()
+{
+    // FIXME, for now we require the user to specifically set a MQTT server (till tested)
+    if (radioConfig.preferences.mqtt_disabled || !*radioConfig.preferences.mqtt_server)
+        DEBUG_MSG("MQTT disabled...\n");
+    else if (!WiFi.isConnected())
+        DEBUG_MSG("WiFi is not connected, can not start MQTT\n");
+    else
+        new MQTT();
+}
+
+MQTT::MQTT() : pubSub(mqttClient)
+{
+    assert(!mqtt);
+    mqtt = this;
+
+    // pubSub.setServer("devsrv.ezdevice.net", 1883); or 192.168.10.188
+    const char *serverAddr = "test.mosquitto.org"; // "mqtt.meshtastic.org"; // default hostname
+
+    if (*radioConfig.preferences.mqtt_server)
+        serverAddr = radioConfig.preferences.mqtt_server; // Override the default
+
+    pubSub.setServer(serverAddr, 1883);
+    pubSub.setCallback(mqttCallback);
+
+    DEBUG_MSG("Connecting to MQTT server: %s\n", serverAddr);
+    auto myStatus = (statusTopic + nodeId);
+    // bool connected = pubSub.connect(nodeId.c_str(), "meshdev", "apes4cats", myStatus.c_str(), 1, true, "offline");
+    bool connected = pubSub.connect(nodeId.c_str(), myStatus.c_str(), 1, true, "offline");
+    if (connected) {
+        DEBUG_MSG("MQTT connected\n");
+
+        static char subsStr[64]; /* We keep this static because the mqtt lib
+                                    might not be copying it */
+        // snprintf(subsStr, sizeof(subsStr), "/ezd/todev/%s/#", clientId);
+        // mqtt.subscribe(subsStr, 1); // we use qos 1 because we don't want to miss messages
+
+        /// FIXME, include more information in the status text
+        bool ok = pubSub.publish(myStatus.c_str(), "online", true);
+        DEBUG_MSG("published %d\n", ok);
+    }
+}
+
+void MQTT::publish(const MeshPacket *mp, String channelId)
+{
+    // DEBUG_MSG("publish %s = %s\n", suffix.c_str(), payload.c_str());
+
+    // pubSub.publish(getTopic(suffix), payload.c_str(), retained);
+}
+
+const char *MQTT::getTopic(String suffix, const char *direction)
+{
+    static char buf[128];
+
+    // "mesh/crypt/CHANNELID/NODEID/PORTID"
+    snprintf(buf, sizeof(buf), "mesh/%s/%s/%s", direction, nodeId.c_str(), suffix.c_str());
+    return buf;
+}