You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
180 lines
4.5 KiB
180 lines
4.5 KiB
/*
|
|
|
|
MQTT MODULE
|
|
|
|
Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
|
|
|
|
*/
|
|
|
|
#include <ESP8266WiFi.h>
|
|
#include <AsyncMqttClient.h>
|
|
#include <vector>
|
|
|
|
AsyncMqttClient mqtt;
|
|
|
|
String mqttTopic;
|
|
std::vector<void (*)(unsigned int, const char *, const char *)> _mqtt_callbacks;
|
|
#if MQTT_SKIP_RETAINED
|
|
unsigned long mqttConnectedAt = 0;
|
|
#endif
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// MQTT
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool mqttConnected() {
|
|
return mqtt.connected();
|
|
}
|
|
|
|
void mqttDisconnect() {
|
|
mqtt.disconnect();
|
|
}
|
|
|
|
void buildTopics() {
|
|
// Replace identifier
|
|
mqttTopic = getSetting("mqttTopic", MQTT_TOPIC);
|
|
mqttTopic.replace("{identifier}", getSetting("hostname"));
|
|
}
|
|
|
|
unsigned int mqttTopicRootLength() {
|
|
return mqttTopic.length();
|
|
}
|
|
|
|
void mqttSendRaw(const char * topic, const char * message) {
|
|
if (mqtt.connected()) {
|
|
DEBUG_MSG("[MQTT] Sending %s => %s\n", topic, message);
|
|
mqtt.publish(topic, MQTT_QOS, MQTT_RETAIN, message);
|
|
}
|
|
}
|
|
|
|
void mqttSend(const char * topic, const char * message) {
|
|
String path = mqttTopic + String(topic);
|
|
mqttSendRaw(path.c_str(), message);
|
|
}
|
|
|
|
void mqttSubscribeRaw(const char * topic) {
|
|
if (mqtt.connected()) {
|
|
DEBUG_MSG("[MQTT] Subscribing to %s\n", topic);
|
|
mqtt.subscribe(topic, MQTT_QOS);
|
|
}
|
|
}
|
|
|
|
void mqttSubscribe(const char * topic) {
|
|
String path = mqttTopic + String(topic);
|
|
mqttSubscribeRaw(path.c_str());
|
|
}
|
|
|
|
void mqttRegister(void (*callback)(unsigned int, const char *, const char *)) {
|
|
_mqtt_callbacks.push_back(callback);
|
|
}
|
|
|
|
void _mqttOnConnect(bool sessionPresent) {
|
|
|
|
DEBUG_MSG("[MQTT] Connected!\n");
|
|
|
|
#if MQTT_SKIP_RETAINED
|
|
mqttConnectedAt = millis();
|
|
#endif
|
|
|
|
// Build MQTT topics
|
|
buildTopics();
|
|
mqtt.setWill((mqttTopic + MQTT_HEARTBEAT_TOPIC).c_str(), MQTT_QOS, MQTT_RETAIN, (char *) "0");
|
|
|
|
// Say hello and report our IP and VERSION
|
|
mqttSend(MQTT_IP_TOPIC, getIP().c_str());
|
|
mqttSend(MQTT_VERSION_TOPIC, APP_VERSION);
|
|
|
|
// 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(AsyncMqttClientDisconnectReason reason) {
|
|
|
|
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, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {
|
|
|
|
char message[len+1];
|
|
strlcpy(message, 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");
|
|
|
|
// Send message event to subscribers
|
|
// Topic is set to the specific part each one might be checking
|
|
for (unsigned char i = 0; i < _mqtt_callbacks.size(); i++) {
|
|
(*_mqtt_callbacks[i])(MQTT_MESSAGE_EVENT, topic, message);
|
|
}
|
|
|
|
}
|
|
|
|
void mqttConnect() {
|
|
|
|
if (!mqtt.connected()) {
|
|
|
|
mqtt.disconnect();
|
|
|
|
char * host = strdup(getSetting("mqttServer", MQTT_SERVER).c_str());
|
|
if (strlen(host) == 0) return;
|
|
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);
|
|
mqtt.setKeepAlive(MQTT_KEEPALIVE).setCleanSession(false);
|
|
mqtt.setWill(MQTT_HEARTBEAT_TOPIC, 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();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
void mqttSetup() {
|
|
mqtt.onConnect(_mqttOnConnect);
|
|
mqtt.onDisconnect(_mqttOnDisconnect);
|
|
mqtt.onMessage(_mqttOnMessage);
|
|
}
|
|
|
|
void mqttLoop() {
|
|
|
|
static unsigned long lastPeriod = 0;
|
|
|
|
if (WiFi.status() == WL_CONNECTED) {
|
|
|
|
if (!mqtt.connected()) {
|
|
|
|
unsigned long currPeriod = millis() / MQTT_RECONNECT_DELAY;
|
|
if (currPeriod != lastPeriod) {
|
|
lastPeriod = currPeriod;
|
|
mqttConnect();
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|