GwOutput_mqtt.cpp

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#include <Arduino.h>
#include "GwOutput_mqtt.h"
#include <ArduinoJson.h>
#include <ESPAsyncWebServer.h>
#include <helperFunctions.h>
#include <debug.h>
#include <PubSubClient.h>
 
#ifdef ESP32
#include <WiFi.h>
#include <AsyncTCP.h>
#include <SPIFFS.h>
#include "esp_system.h"
#include "esp_event.h"
#include "mqtt_client.h"
#include "esp_tls.h"
#elif defined(ESP8266)
#include <ESP8266WiFi.h>
#include <ESPAsyncTCP.h>
#include <Hash.h>
#include <SPI.h>
#ifdef SECURE_MQTT
#include <WiFiClientSecure.h>
#else
#include <WiFiClient.h>
#endif // SECURE_MQTT
#endif // ESP32
 
#include <FS.h>
 
 
GwOutput_MQTT GwOutput;
 
void GwOutput_MQTT::configManagerStart (EnigmaIOTGatewayClass* enigmaIotGw) {
    enigmaIotGateway = enigmaIotGw;
    mqttServerParam = new AsyncWiFiManagerParameter ("mqttserver", "MQTT Server", mqttgw_config.mqtt_server, 41, "required type=\"text\" maxlength=40");
    char port[10];
    itoa (mqttgw_config.mqtt_port, port, 10);
    mqttPortParam = new AsyncWiFiManagerParameter ("mqttport", "MQTT Port", port, 6, "required type=\"number\" min=\"0\" max=\"65535\" step=\"1\"");
    mqttUserParam = new AsyncWiFiManagerParameter ("mqttuser", "MQTT User", mqttgw_config.mqtt_user, 21, "required type=\"text\" maxlength=20");
    mqttPassParam = new AsyncWiFiManagerParameter ("mqttpass", "MQTT Password", "", 41, "type=\"password\" maxlength=40");
 
    enigmaIotGateway->addWiFiManagerParameter (mqttServerParam);
    enigmaIotGateway->addWiFiManagerParameter (mqttPortParam);
    enigmaIotGateway->addWiFiManagerParameter (mqttUserParam);
    enigmaIotGateway->addWiFiManagerParameter (mqttPassParam);
 
}
 
bool GwOutput_MQTT::saveConfig () {
    if (!SPIFFS.begin ()) {
        DEBUG_WARN ("Error opening filesystem");
    }
    DEBUG_DBG ("Filesystem opened");
 
    File configFile = SPIFFS.open (CONFIG_FILE, "w");
    if (!configFile) {
        DEBUG_WARN ("Failed to open config file %s for writing", CONFIG_FILE);
        return false;
    } else {
        DEBUG_DBG ("%s opened for writting", CONFIG_FILE);
    }
 
    const size_t capacity = JSON_OBJECT_SIZE (4) + 110;
    DynamicJsonDocument doc (capacity);
 
    doc["mqtt_server"] = mqttgw_config.mqtt_server;
    doc["mqtt_port"] = mqttgw_config.mqtt_port;
    doc["mqtt_user"] = mqttgw_config.mqtt_user;
    doc["mqtt_pass"] = mqttgw_config.mqtt_pass;
 
    if (serializeJson (doc, configFile) == 0) {
        DEBUG_ERROR ("Failed to write to file");
        configFile.close ();
        //SPIFFS.remove (CONFIG_FILE); // Testing only
        return false;
    }
 
    String output;
    serializeJsonPretty (doc, output);
 
    DEBUG_DBG ("%s", output.c_str ());
 
    configFile.flush ();
    size_t size = configFile.size ();
 
    configFile.close ();
    DEBUG_DBG ("Gateway configuration saved to flash. %u bytes", size);
    return true;
}
 
bool GwOutput_MQTT::loadConfig () {
    //SPIFFS.remove (CONFIG_FILE); // Only for testing
    bool json_correct = false;
 
    if (!SPIFFS.begin ()) {
        DEBUG_WARN ("Error starting filesystem. Formatting");
        SPIFFS.format ();
        WiFi.disconnect ();
    }
 
    if (SPIFFS.exists (CONFIG_FILE)) {
 
        DEBUG_DBG ("Opening %s file", CONFIG_FILE);
        File configFile = SPIFFS.open (CONFIG_FILE, "r");
        if (configFile) {
            size_t size = configFile.size ();
            DEBUG_DBG ("%s opened. %u bytes", CONFIG_FILE, size);
 
            const size_t capacity = JSON_OBJECT_SIZE (4) + 110;
            DynamicJsonDocument doc (capacity);
 
            DeserializationError error = deserializeJson (doc, configFile);
 
            if (error) {
                DEBUG_ERROR ("Failed to parse file");
            } else {
                DEBUG_DBG ("JSON file parsed");
            }
 
            if (doc.containsKey ("mqtt_server") && doc.containsKey ("mqtt_port")
                && doc.containsKey ("mqtt_user") && doc.containsKey ("mqtt_pass")) {
                json_correct = true;
            }
 
            strncpy (mqttgw_config.mqtt_server, doc["mqtt_server"] | "", sizeof (mqttgw_config.mqtt_server));
            mqttgw_config.mqtt_port = doc["mqtt_port"].as<int> ();
            strncpy (mqttgw_config.mqtt_user, doc["mqtt_user"] | "", sizeof (mqttgw_config.mqtt_user));
            strncpy (mqttgw_config.mqtt_pass, doc["mqtt_pass"] | "", sizeof (mqttgw_config.mqtt_pass));
 
            configFile.close ();
            if (json_correct) {
                DEBUG_INFO ("MQTT output module configuration successfuly read");
            }
            DEBUG_DBG ("==== MQTT Configuration ====");
            DEBUG_DBG ("MQTT server: %s", mqttgw_config.mqtt_server);
            DEBUG_DBG ("MQTT port: %d", mqttgw_config.mqtt_port);
            DEBUG_DBG ("MQTT user: %s", mqttgw_config.mqtt_user);
            DEBUG_VERBOSE ("MQTT password: %s", mqttgw_config.mqtt_pass);
 
            String output;
            serializeJsonPretty (doc, output);
 
            DEBUG_DBG ("JSON file %s", output.c_str ());
 
        } else {
            DEBUG_WARN ("Error opening %s", CONFIG_FILE);
        }
    } else {
        DEBUG_WARN ("%s do not exist", CONFIG_FILE);
    }
 
    return json_correct;
}
 
 
void GwOutput_MQTT::configManagerExit (bool status) {
    DEBUG_INFO ("==== Config Portal MQTTGW result ====");
    DEBUG_INFO ("MQTT server: %s", mqttServerParam->getValue ());
    DEBUG_INFO ("MQTT port: %s", mqttPortParam->getValue ());
    DEBUG_INFO ("MQTT user: %s", mqttUserParam->getValue ());
    DEBUG_INFO ("MQTT password: %s", mqttPassParam->getValue ());
    DEBUG_INFO ("Status: %s", status ? "true" : "false");
 
    if (status && EnigmaIOTGateway.getShouldSave ()) {
        memcpy (mqttgw_config.mqtt_server, mqttServerParam->getValue (), mqttServerParam->getValueLength ());
        mqttgw_config.mqtt_server[mqttServerParam->getValueLength ()] = '\0';
        DEBUG_DBG ("MQTT Server: %s", mqttgw_config.mqtt_server);
        mqttgw_config.mqtt_port = atoi (mqttPortParam->getValue ());
        memcpy (mqttgw_config.mqtt_user, mqttUserParam->getValue (), mqttUserParam->getValueLength ());
        const char* mqtt_pass = mqttPassParam->getValue ();
        if (mqtt_pass && (mqtt_pass[0] != '\0')) {// If password is empty, keep the old one
            memcpy (mqttgw_config.mqtt_pass, mqtt_pass, mqttPassParam->getValueLength ());
            mqttgw_config.mqtt_pass[mqttPassParam->getValueLength ()] = '\0';
        } else {
            DEBUG_INFO ("MQTT password field empty. Keeping the old one");
        }
        DEBUG_DBG ("MQTT pass: %s", mqttgw_config.mqtt_pass);
        if (!saveConfig ()) {
            DEBUG_ERROR ("Error writting MQTT config to filesystem.");
        } else {
            DEBUG_INFO ("Configuration stored");
        }
    } else {
        DEBUG_DBG ("Configuration does not need to be saved");
    }
 
    delete (mqttServerParam);
    delete (mqttPortParam);
    delete (mqttUserParam);
    delete (mqttPassParam);
}
 
bool GwOutput_MQTT::begin () {
 
#ifdef SECURE_MQTT
    randomSeed (micros ());
#ifdef ESP32
    espClient.setCACert (DSTroot_CA);
#elif defined(ESP8266)
    espClient.setTrustAnchors (&certificate);
#endif // ESP32
    DEBUG_INFO ("CA store set");
#endif // SECURE_MQTT
    mqtt_client.setServer (mqttgw_config.mqtt_server, mqttgw_config.mqtt_port);
    DEBUG_INFO ("Set MQTT server %s - port %d", mqttgw_config.mqtt_server, mqttgw_config.mqtt_port);
 
    netName = String (EnigmaIOTGateway.getNetworkName ());
 
#ifdef ESP32
    uint64_t chipid = ESP.getEfuseMac ();
    clientId = netName + String ((uint32_t)chipid, HEX);
#elif defined(ESP8266)
    clientId = netName + String (ESP.getChipId (), HEX);
#endif // ESP32
    gwTopic = netName + GW_STATUS;
    reconnect ();
    return true;
}
 
void GwOutput_MQTT::reconnect () {
    // Loop until we're reconnected
    while (!mqtt_client.connected ()) {
        // TODO: startConnectionFlash (500);
        DEBUG_INFO ("Attempting MQTT connection...");
        // Create a random client ID
        // Attempt to connect
#ifdef SECURE_MQTT
        setClock ();
#endif
        DEBUG_DBG ("Clock set.");
        DEBUG_DBG ("Connect to MQTT server: user %s, pass %s, topic %s",
                   mqttgw_config.mqtt_user, mqttgw_config.mqtt_pass, gwTopic.c_str ());
        //client.setServer (mqttgw_config.mqtt_server, mqttgw_config.mqtt_port);
        if (mqtt_client.connect (clientId.c_str (), mqttgw_config.mqtt_user, mqttgw_config.mqtt_pass, gwTopic.c_str (), 0, true, "0", true)) {
            DEBUG_WARN ("MQTT connected");
            // Once connected, publish an announcement...
            publishMQTT (gwTopic.c_str (), "1", 1, true);
            // ... and resubscribe
            String dlTopic = netName + String ("/+/set/#");
            mqtt_client.subscribe (dlTopic.c_str ());
            dlTopic = netName + String ("/+/get/#");
            mqtt_client.subscribe (dlTopic.c_str ());
            mqtt_client.setCallback (onDlData);
            // TODO: stopConnectionFlash ();
        } else {
            mqtt_client.disconnect ();
            DEBUG_ERROR ("failed, rc=%d try again in 5 seconds", mqtt_client.state ());
#ifdef SECURE_MQTT
            char error[100];
#ifdef ESP8266
            int errorCode = espClient.getLastSSLError (error, 100);
#elif defined ESP32
            int errorCode = espClient.lastError (error, 100);
#endif
            DEBUG_ERROR ("Connect error %d: %s", errorCode, error);
#endif
            // Wait 5 seconds before retrying
#ifdef ESP32
            const TickType_t xDelay = 5000 / portTICK_PERIOD_MS;
            vTaskDelay (xDelay);
#else
            delay (5000);
#endif
        }
    }
}
 
char* getTopicAddress (char* topic, unsigned int& len) {
    if (!topic)
        return NULL;
 
    char* start = strchr (topic, '/') + 1;
    char* end;
 
    if (start) {
        end = strchr (start, '/');
    } else {
        return NULL;
    }
    //DEBUG_INFO ("Start %p : %d", start, start - topic);
    //DEBUG_INFO ("End %p : %d", end, end - topic);
    if (end) {
        len = end - start;
    } else {
        len = strlen (topic) - (start - topic);
    }
 
    return start;
}
 
control_message_type_t checkMsgType (String data) {
    if (data == GET_VERSION) {
        return control_message_type::VERSION;
    } else if (data == GET_SLEEP) {
        return control_message_type::SLEEP_GET;
    } else if (data == SET_SLEEP) {
        return control_message_type::SLEEP_SET;
    } else if (data == SET_OTA) {
        return control_message_type::OTA;
    } else if (data == SET_IDENTIFY) {
        DEBUG_WARN ("IDENTIFY MESSAGE %s", data.c_str ());
        return control_message_type::IDENTIFY;
    } else if (data == SET_RESET_CONFIG) {
        DEBUG_WARN ("RESET CONFIG MESSAGE %s", data.c_str ());
        return control_message_type::RESET;
    } else if (data == GET_RSSI) {
        DEBUG_INFO ("GET RSSI MESSAGE %s", data.c_str ());
        return control_message_type::RSSI_GET;
    } else if (data == SET_USER_DATA) {
        DEBUG_INFO ("USER DATA %s", data.c_str ());
        return control_message_type::USERDATA_SET;
    } else if (data == GET_USER_DATA) {
        DEBUG_INFO ("USER DATA %s", data.c_str ());
        return control_message_type::USERDATA_GET;
    } else if (data == GET_NAME) {
        DEBUG_INFO ("GET NODE NAME AND ADDRESS");
        return control_message_type::NAME_GET;
    } else if (data == SET_NAME) {
        DEBUG_INFO ("SET NODE NAME %", data.c_str ());
        return control_message_type::NAME_SET;
    } else
        return control_message_type::INVALID;
}
 
control_message_type_t getTopicType (char* topic, char*& userCommand) {
    if (!topic)
        return control_message_type::INVALID;
 
    String command;
 
    //Discard address
    char* start = strchr (topic, '/') + 1;
    if (start)
        start = strchr (start, '/') + 1;
    else
        return control_message_type::INVALID;
    //DEBUG_INFO ("Second Start %p", start);
    if ((int)start > 0x01) { // TODO: Why this condition ????
        command = String (start);
        userCommand = start;
    } else {
        return control_message_type::INVALID;
    }
    //DEBUG_INFO ("Start %p : %d", start, start - topic);
    //DEBUG_INFO ("Command %s", command.c_str());
 
    control_message_type_t msgType = checkMsgType (command);
 
    return msgType;
}
 
 
void GwOutput_MQTT::onDlData (char* topic, uint8_t* data, unsigned int len) {
    uint8_t addr[ENIGMAIOT_ADDR_LEN];
    char* addressStr;
    control_message_type_t msgType;
    char* userCommand;
    char* nodeName = NULL;
 
 
    DEBUG_DBG ("Topic %s", topic);
 
    unsigned int addressLen;
 
    addressStr = getTopicAddress (topic, addressLen);
 
    if (addressStr) {
        //DEBUG_INFO ("Len: %u", addressLen);
        DEBUG_DBG ("Address %.*s", addressLen, addressStr);
        if (!str2mac (addressStr, addr)) {
            DEBUG_INFO ("Not a mac address. Treating it as a node name");
            if (addressLen) {
                nodeName = (char*)calloc (addressLen + 1, sizeof (char));
                memcpy (nodeName, addressStr, addressLen);
            } else {
                DEBUG_WARN ("Invalid address");
                return;
            }
        } else {
            DEBUG_DBG ("Hex Address = %s", printHexBuffer (addr, 6));
        }
    } else
        return;
 
    msgType = getTopicType (topic, userCommand);
 
 
    DEBUG_DBG ("User command: %s", userCommand);
    DEBUG_DBG ("MsgType 0x%02X", msgType);
    DEBUG_DBG ("Data: %.*s\n", len, data);
 
    if (msgType != control_message_type_t::INVALID)
        GwOutput.downlinkCb (addr, nodeName, msgType, (char*)data, len);
    else
        DEBUG_WARN ("Invalid message");
 
    if (nodeName) {
        free (nodeName);
        nodeName = NULL;
    }
}
 
void GwOutput_MQTT::loop () {
    mqtt_queue_item_t* message;
 
    mqtt_client.loop ();
    if (!mqtt_client.connected ()) {
        reconnect ();
    } else {
        if (!mqtt_queue.empty ()) {
            message = getMQTTqueue ();
            if (publishMQTT (message->topic, message->payload, message->payload_len, message->retain)) {
                DEBUG_DBG ("MQTT published. %s %.*s", message->topic, message->payload_len, message->payload);
                popMQTTqueue ();
            }
        }
    }
}
 
bool GwOutput_MQTT::publishMQTT (const char* topic, const char* payload, size_t len, bool retain) {
    DEBUG_INFO ("Publish MQTT. %s : %.*s", topic, len, payload);
    if (mqtt_client.connected ()) {
        return mqtt_client.publish (topic, (uint8_t*)payload, len, retain);
    } else {
        DEBUG_WARN ("MQTT client not connected");
        return false;
    }
}
 
#ifdef SECURE_MQTT
void GwOutput_MQTT::setClock () {
    configTime (1 * 3600, 0, "pool.ntp.org", "time.nist.gov");
#if DEBUG_LEVEL >= INFO
    DEBUG_INFO ("\nWaiting for NTP time sync: ");
    time_t now = time (nullptr);
    while (now < 8 * 3600 * 2) {
        delay (500);
        Serial.print (".");
        now = time (nullptr);
    }
    //Serial.println ("");
    struct tm timeinfo;
    gmtime_r (&now, &timeinfo);
    DEBUG_INFO ("Current time: %s", asctime (&timeinfo));
#endif
}
#endif
 
bool GwOutput_MQTT::addMQTTqueue (const char* topic, char* payload, size_t len, bool retain) {
    mqtt_queue_item_t* message = new mqtt_queue_item_t;
 
    if (mqtt_queue.size () >= MAX_MQTT_QUEUE_SIZE) {
        mqtt_queue.pop ();
    }
 
    message->topic = (char*)malloc (strlen (topic) + 1);
    strcpy (message->topic, topic);
    message->payload_len = len;
    message->payload = (char*)malloc (len);
    memcpy (message->payload, payload, len);
    message->retain = retain;
 
    mqtt_queue.push (message);
    DEBUG_DBG ("%d MQTT messages queued Len:%d %s %.*s", mqtt_queue.size (),
               len,
               message->topic,
               message->payload_len, message->payload);
 
    return true;
}
 
mqtt_queue_item_t* GwOutput_MQTT::getMQTTqueue () {
    if (mqtt_queue.size ()) {
        DEBUG_DBG ("MQTT message got from queue");
        return mqtt_queue.front ();
    }
    return NULL;
}
 
void GwOutput_MQTT::popMQTTqueue () {
    mqtt_queue_item_t* message;
 
    if (mqtt_queue.size ()) {
        message = mqtt_queue.front ();
        if (message) {
            if (message->topic) {
                delete(message->topic);
            }
            if (message->payload) {
                delete(message->payload);
            }
            delete message;
        }
        mqtt_queue.pop ();
        DEBUG_DBG ("MQTT message pop. Size %d", mqtt_queue.size ());
    }
}
 
bool GwOutput_MQTT::outputDataSend (char* address, char* data, size_t length, GwOutput_data_type_t type) {
    const int TOPIC_SIZE = 64;
    char topic[TOPIC_SIZE];
    bool result;
    switch (type) {
    case GwOutput_data_type::data:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, NODE_DATA);
        break;
    case GwOutput_data_type::lostmessages:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, LOST_MESSAGES);
        break;
    case GwOutput_data_type::status:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, NODE_STATUS);
        break;
    }
    if ((result = addMQTTqueue (topic, data, length))) {
        DEBUG_INFO ("MQTT queued %s. Length %d", topic, length);
    } else {
        DEBUG_WARN ("Error queuing MQTT %s", topic);
    }
    return result;
}
 
bool GwOutput_MQTT::outputControlSend (char* address, uint8_t* data, size_t length) {
    const int TOPIC_SIZE = 64;
    const int PAYLOAD_SIZE = 512;
    char topic[TOPIC_SIZE];
    char payload[PAYLOAD_SIZE];
    size_t pld_size = 0;
    bool result = false;
 
    switch (data[0]) {
    case control_message_type::VERSION_ANS:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, GET_VERSION_ANS);
        pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"version\":\"%.*s\"}", length - 1, data + 1);
        if (addMQTTqueue (topic, payload, pld_size)) {
            DEBUG_INFO ("Published MQTT %s %s", topic, payload);
            result = true;
        }
        break;
    case control_message_type::SLEEP_ANS:
        uint32_t sleepTime;
        memcpy (&sleepTime, data + 1, sizeof (sleepTime));
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, GET_SLEEP_ANS);
        pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"sleeptime\":%d}", sleepTime);
        if (addMQTTqueue (topic, payload, pld_size)) {
            DEBUG_INFO ("Published MQTT %s %s", topic, payload);
            result = true;
        }
        break;
    case control_message_type::RESET_ANS:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, SET_RESET_ANS);
        pld_size = snprintf (payload, PAYLOAD_SIZE, "{}");
        if (addMQTTqueue (topic, payload, pld_size)) {
            DEBUG_INFO ("Published MQTT %s %s", topic, payload);
            result = true;
        }
        break;
    case control_message_type::RSSI_ANS:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, GET_RSSI_ANS);
        pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"rssi\":%d,\"channel\":%u}", (int8_t)data[1], data[2]);
        if (addMQTTqueue (topic, payload, pld_size)) {
            DEBUG_INFO ("Published MQTT %s %s", topic, payload);
            result = true;
        }
        break;
    case control_message_type::NAME_ANS:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, GET_NAME_ANS);
        char addrStr[ENIGMAIOT_ADDR_LEN * 3];
        pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"name\":\"%.*s\",\"address\":\"%s\"}", length - ENIGMAIOT_ADDR_LEN - 1, (char*)(data + 1 + ENIGMAIOT_ADDR_LEN), mac2str (data + 1, addrStr));
        if (addMQTTqueue (topic, payload, pld_size)) {
            DEBUG_INFO ("Published MQTT %s %s", topic, payload);
            result = true;
        }
        break;
    case control_message_type::OTA_ANS:
        snprintf (topic, TOPIC_SIZE, "%s/%s/%s", netName.c_str (), address, SET_OTA_ANS);
        switch (data[1]) {
        case ota_status::OTA_STARTED:
            pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"result\":\"OTA Started\",\"status\":%u}\n", data[1]);
            break;
        case ota_status::OTA_START_ERROR:
            pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"result\":\"OTA Start error\",\"status\":%u}\n", data[1]);
            break;
        case ota_status::OTA_OUT_OF_SEQUENCE:
            uint16_t lastGoodIdx;
            memcpy ((uint8_t*)&lastGoodIdx, data + 2, sizeof (uint16_t));
            pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"last_chunk\":%d,\"result\":\"OTA out of sequence error\",\"status\":%u}\n", lastGoodIdx, data[1]);
            break;
        case ota_status::OTA_CHECK_OK:
            pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"result\":\"OTA check OK\",\"status\":%u}\n", data[1]);
            break;
        case ota_status::OTA_CHECK_FAIL:
            pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"result\":\"OTA check failed\",\"status\":%u}\n", data[1]);
            break;
        case ota_status::OTA_TIMEOUT:
            pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"result\":\"OTA timeout\",\"status\":%u}\n", data[1]);
            break;
        case ota_status::OTA_FINISHED:
            pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"result\":\"OTA finished OK\",\"status\":%u}\n", data[1]);
            break;
        }
        if (addMQTTqueue (topic, payload, pld_size)) {
            DEBUG_INFO ("Published MQTT %s %s", topic, payload);
            result = true;
        }
        break;
    default:
        DEBUG_WARN ("Unknown control message. Code: 0x%02X", data[0]);
    }
 
    return result;
}
 
bool GwOutput_MQTT::newNodeSend (char* address, uint16_t node_id) {
    const int TOPIC_SIZE = 64;
 
    char topic[TOPIC_SIZE];
 
    uint8_t* nodeAddress = enigmaIotGateway->getNodes ()->getNodeFromID (node_id)->getMacAddress ();
    char addrStr[ENIGMAIOT_ADDR_LEN * 3];
 
    char payload[ENIGMAIOT_ADDR_LEN * 3 + 14];
 
    snprintf (payload, ENIGMAIOT_ADDR_LEN * 3 + 14, "{\"address\":\"%s\"}", mac2str (nodeAddress, addrStr));
 
    snprintf (topic, TOPIC_SIZE, "%s/%s/hello", netName.c_str (), address);
    bool result = addMQTTqueue (topic, payload, ENIGMAIOT_ADDR_LEN * 3 + 14);
    DEBUG_INFO ("Published MQTT %s", topic);
    return result;
}
 
bool GwOutput_MQTT::nodeDisconnectedSend (char* address, gwInvalidateReason_t reason) {
    const int TOPIC_SIZE = 64;
    const int PAYLOAD_SIZE = 64;
 
    char topic[TOPIC_SIZE];
    char payload[PAYLOAD_SIZE];
    size_t pld_size;
 
    snprintf (topic, TOPIC_SIZE, "%s/%s/bye", netName.c_str (), address);
    pld_size = snprintf (payload, PAYLOAD_SIZE, "{\"reason\":%u}", reason);
    bool result = addMQTTqueue (topic, payload, pld_size);
    DEBUG_INFO ("Published MQTT %s result = %s", topic, result ? "OK" : "Fail");
    return result;
}