/*
|
|
|
|
MQTT MODULE
|
|
|
|
Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
|
|
|
|
*/
|
|
|
|
#include <ESP8266WiFi.h>
|
|
#include <vector>
|
|
|
|
#if MQTT_USE_ASYNC
|
|
#include <AsyncMqttClient.h>
|
|
AsyncMqttClient mqtt;
|
|
#else
|
|
#include <PubSubClient.h>
|
|
WiFiClient mqttWiFiClient;
|
|
PubSubClient mqtt(mqttWiFiClient);
|
|
bool _mqttConnected = false;
|
|
#endif
|
|
|
|
String mqttTopic;
|
|
bool _mqttForward;
|
|
std::vector<void (*)(unsigned int, const char *, const char *)> _mqtt_callbacks;
|
|
#if MQTT_SKIP_RETAINED
|
|
unsigned long mqttConnectedAt = 0;
|
|
#endif
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Public API
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool mqttConnected() {
|
|
return mqtt.connected();
|
|
}
|
|
|
|
void mqttDisconnect() {
|
|
mqtt.disconnect();
|
|
}
|
|
|
|
void buildTopics() {
|
|
// Replace identifier
|
|
mqttTopic = getSetting("mqttTopic", MQTT_TOPIC);
|
|
mqttTopic.replace("{identifier}", getSetting("hostname"));
|
|
}
|
|
|
|
bool mqttForward() {
|
|
return _mqttForward;
|
|
}
|
|
|
|
String mqttSubtopic(char * topic) {
|
|
|
|
String response;
|
|
|
|
String t = String(topic);
|
|
String mqttSetter = getSetting("mqttSetter", MQTT_USE_SETTER);
|
|
|
|
if (t.startsWith(mqttTopic) && t.endsWith(mqttSetter)) {
|
|
response = t.substring(mqttTopic.length(), t.length() - mqttSetter.length());
|
|
}
|
|
|
|
return response;
|
|
|
|
}
|
|
|
|
void mqttSendRaw(const char * topic, const char * message) {
|
|
if (mqtt.connected()) {
|
|
DEBUG_MSG("[MQTT] Sending %s => %s\n", topic, message);
|
|
#if MQTT_USE_ASYNC
|
|
mqtt.publish(topic, MQTT_QOS, MQTT_RETAIN, message);
|
|
#else
|
|
mqtt.publish(topic, message, MQTT_RETAIN);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void mqttSend(const char * topic, const char * message) {
|
|
String mqttGetter = getSetting("mqttGetter", MQTT_USE_GETTER);
|
|
String path = mqttTopic + String(topic) + mqttGetter;
|
|
mqttSendRaw(path.c_str(), message);
|
|
}
|
|
|
|
void mqttSend(const char * topic, unsigned int index, const char * message) {
|
|
String mqttGetter = getSetting("mqttGetter", MQTT_USE_GETTER);
|
|
String path = mqttTopic + String(topic) + String ("/") + String(index) + mqttGetter;;
|
|
mqttSendRaw(path.c_str(), message);
|
|
}
|
|
|
|
void mqttSubscribeRaw(const char * topic) {
|
|
if (mqtt.connected() && (strlen(topic) > 0)) {
|
|
DEBUG_MSG("[MQTT] Subscribing to %s\n", topic);
|
|
mqtt.subscribe(topic, MQTT_QOS);
|
|
}
|
|
}
|
|
|
|
void mqttSubscribe(const char * topic) {
|
|
String mqttSetter = getSetting("mqttSetter", MQTT_USE_SETTER);
|
|
String path = mqttTopic + String(topic) + mqttSetter;
|
|
mqttSubscribeRaw(path.c_str());
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Callbacks
|
|
// -----------------------------------------------------------------------------
|
|
|
|
void mqttRegister(void (*callback)(unsigned int, const char *, const char *)) {
|
|
_mqtt_callbacks.push_back(callback);
|
|
}
|
|
|
|
void _mqttOnConnect() {
|
|
|
|
DEBUG_MSG("[MQTT] Connected!\n");
|
|
|
|
#if MQTT_SKIP_RETAINED
|
|
mqttConnectedAt = millis();
|
|
#endif
|
|
|
|
// Build MQTT topics
|
|
buildTopics();
|
|
|
|
// Say hello and report our IP and VERSION
|
|
mqttSend(MQTT_IP_TOPIC, getIP().c_str());
|
|
mqttSend(MQTT_VERSION_TOPIC, APP_VERSION);
|
|
mqttSend(MQTT_STATUS_TOPIC, "1");
|
|
|
|
// Subscribe to system topics
|
|
mqttSubscribe(MQTT_ACTION_TOPIC);
|
|
|
|
// Send connect event to subscribers
|
|
for (unsigned char i = 0; i < _mqtt_callbacks.size(); i++) {
|
|
(*_mqtt_callbacks[i])(MQTT_CONNECT_EVENT, NULL, NULL);
|
|
}
|
|
|
|
}
|
|
|
|
void _mqttOnDisconnect() {
|
|
|
|
DEBUG_MSG("[MQTT] Disconnected!\n");
|
|
|
|
// Send disconnect event to subscribers
|
|
for (unsigned char i = 0; i < _mqtt_callbacks.size(); i++) {
|
|
(*_mqtt_callbacks[i])(MQTT_DISCONNECT_EVENT, NULL, NULL);
|
|
}
|
|
|
|
}
|
|
|
|
void _mqttOnMessage(char* topic, char* payload, unsigned int len) {
|
|
|
|
char message[len + 1];
|
|
strlcpy(message, (char *) payload, len + 1);
|
|
|
|
DEBUG_MSG("[MQTT] Received %s => %s", topic, message);
|
|
#if MQTT_SKIP_RETAINED
|
|
if (millis() - mqttConnectedAt < MQTT_SKIP_TIME) {
|
|
DEBUG_MSG(" - SKIPPED\n");
|
|
return;
|
|
}
|
|
#endif
|
|
DEBUG_MSG("\n");
|
|
|
|
// Check system topics
|
|
String t = mqttSubtopic((char *) topic);
|
|
if (t.equals(MQTT_ACTION_TOPIC)) {
|
|
if (strcmp(message, MQTT_ACTION_RESET) == 0) {
|
|
ESP.restart();
|
|
}
|
|
}
|
|
|
|
// Send message event to subscribers
|
|
for (unsigned char i = 0; i < _mqtt_callbacks.size(); i++) {
|
|
(*_mqtt_callbacks[i])(MQTT_MESSAGE_EVENT, topic, message);
|
|
}
|
|
|
|
}
|
|
|
|
void mqttConnect() {
|
|
|
|
if (!mqtt.connected()) {
|
|
|
|
if (getSetting("mqttServer", MQTT_SERVER).length() == 0) return;
|
|
|
|
// Last option: reconnect to wifi after MQTT_MAX_TRIES attemps in a row
|
|
#if MQTT_MAX_TRIES > 0
|
|
static unsigned int tries = 0;
|
|
static unsigned long last_try = millis();
|
|
if (millis() - last_try < MQTT_TRY_INTERVAL) {
|
|
if (++tries > MQTT_MAX_TRIES) {
|
|
DEBUG_MSG("[MQTT] MQTT_MAX_TRIES met, disconnecting from WiFi\n");
|
|
wifiDisconnect();
|
|
tries = 0;
|
|
return;
|
|
}
|
|
} else {
|
|
tries = 0;
|
|
}
|
|
last_try = millis();
|
|
#endif
|
|
|
|
mqtt.disconnect();
|
|
|
|
char * host = strdup(getSetting("mqttServer", MQTT_SERVER).c_str());
|
|
unsigned int port = getSetting("mqttPort", MQTT_PORT).toInt();
|
|
char * user = strdup(getSetting("mqttUser").c_str());
|
|
char * pass = strdup(getSetting("mqttPassword").c_str());
|
|
|
|
DEBUG_MSG("[MQTT] Connecting to broker at %s", host);
|
|
mqtt.setServer(host, port);
|
|
|
|
#if MQTT_USE_ASYNC
|
|
|
|
mqtt.setKeepAlive(MQTT_KEEPALIVE).setCleanSession(false);
|
|
mqtt.setWill((mqttTopic + MQTT_HEARTBEAT_TOPIC).c_str(), MQTT_QOS, MQTT_RETAIN, "0");
|
|
if ((strlen(user) > 0) && (strlen(pass) > 0)) {
|
|
DEBUG_MSG(" as user '%s'.", user);
|
|
mqtt.setCredentials(user, pass);
|
|
}
|
|
DEBUG_MSG("\n");
|
|
mqtt.connect();
|
|
|
|
#else
|
|
|
|
bool response;
|
|
|
|
if ((strlen(user) > 0) && (strlen(pass) > 0)) {
|
|
DEBUG_MSG(" as user '%s'\n", user);
|
|
response = mqtt.connect(getIdentifier().c_str(), user, pass, (mqttTopic + MQTT_STATUS_TOPIC).c_str(), MQTT_QOS, MQTT_RETAIN, "0");
|
|
} else {
|
|
DEBUG_MSG("\n");
|
|
response = mqtt.connect(getIdentifier().c_str(), (mqttTopic + MQTT_STATUS_TOPIC).c_str(), MQTT_QOS, MQTT_RETAIN, "0");
|
|
}
|
|
|
|
if (response) {
|
|
_mqttOnConnect();
|
|
_mqttConnected = true;
|
|
} else {
|
|
DEBUG_MSG("[MQTT] Connection failed\n");
|
|
}
|
|
|
|
#endif
|
|
|
|
free(host);
|
|
free(user);
|
|
free(pass);
|
|
|
|
String mqttSetter = getSetting("mqttSetter", MQTT_USE_SETTER);
|
|
String mqttGetter = getSetting("mqttGetter", MQTT_USE_GETTER);
|
|
bool _mqttForward = !mqttGetter.equals(mqttSetter);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
void mqttSetup() {
|
|
#if MQTT_USE_ASYNC
|
|
mqtt.onConnect([](bool sessionPresent) {
|
|
_mqttOnConnect();
|
|
});
|
|
mqtt.onDisconnect([](AsyncMqttClientDisconnectReason reason) {
|
|
_mqttOnDisconnect();
|
|
});
|
|
mqtt.onMessage([](char* topic, char* payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {
|
|
_mqttOnMessage(topic, payload, len);
|
|
});
|
|
#else
|
|
mqtt.setCallback([](char* topic, byte* payload, unsigned int length) {
|
|
_mqttOnMessage(topic, (char *) payload, length);
|
|
});
|
|
#endif
|
|
buildTopics();
|
|
}
|
|
|
|
void mqttLoop() {
|
|
|
|
static unsigned long lastPeriod = 0;
|
|
|
|
if (WiFi.status() == WL_CONNECTED) {
|
|
|
|
if (!mqtt.connected()) {
|
|
|
|
#if not MQTT_USE_ASYNC
|
|
if (_mqttConnected) {
|
|
_mqttOnDisconnect();
|
|
_mqttConnected = false;
|
|
}
|
|
#endif
|
|
|
|
unsigned long currPeriod = millis() / MQTT_RECONNECT_DELAY;
|
|
if (currPeriod != lastPeriod) {
|
|
lastPeriod = currPeriod;
|
|
mqttConnect();
|
|
}
|
|
|
|
#if not MQTT_USE_ASYNC
|
|
} else {
|
|
mqtt.loop();
|
|
#endif
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|