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.
437 lines
13 KiB
437 lines
13 KiB
/*
|
|
|
|
MQTT MODULE
|
|
|
|
Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
|
|
|
|
*/
|
|
|
|
#include <ESP8266WiFi.h>
|
|
#include <ArduinoJson.h>
|
|
#include <vector>
|
|
#include <Ticker.h>
|
|
|
|
const char *mqtt_user = 0;
|
|
const char *mqtt_pass = 0;
|
|
|
|
#if MQTT_USE_ASYNC
|
|
#include <AsyncMqttClient.h>
|
|
AsyncMqttClient mqtt;
|
|
#else
|
|
#include <PubSubClient.h>
|
|
WiFiClient mqttWiFiClient;
|
|
PubSubClient mqtt(mqttWiFiClient);
|
|
bool _mqttConnected = false;
|
|
#endif
|
|
|
|
String _mqttTopic;
|
|
String _mqttSetter;
|
|
String _mqttGetter;
|
|
|
|
bool _mqttForward;
|
|
char *_mqttUser = 0;
|
|
char *_mqttPass = 0;
|
|
char *_mqttWill;
|
|
std::vector<void (*)(unsigned int, const char *, const char *)> _mqtt_callbacks;
|
|
#if MQTT_SKIP_RETAINED
|
|
unsigned long mqttConnectedAt = 0;
|
|
#endif
|
|
|
|
typedef struct {
|
|
char * topic;
|
|
char * message;
|
|
} mqtt_message_t;
|
|
std::vector<mqtt_message_t> _mqtt_queue;
|
|
Ticker mqttFlushTicker;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Public API
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool mqttConnected() {
|
|
return mqtt.connected();
|
|
}
|
|
|
|
void mqttDisconnect() {
|
|
mqtt.disconnect();
|
|
}
|
|
|
|
bool mqttForward() {
|
|
return _mqttForward;
|
|
}
|
|
|
|
String mqttSubtopic(char * topic) {
|
|
String response;
|
|
String t = String(topic);
|
|
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()) {
|
|
#if MQTT_USE_ASYNC
|
|
unsigned int packetId = mqtt.publish(topic, MQTT_QOS, MQTT_RETAIN, message);
|
|
DEBUG_MSG_P(PSTR("[MQTT] Sending %s => %s (PID %d)\n"), topic, message, packetId);
|
|
#else
|
|
mqtt.publish(topic, message, MQTT_RETAIN);
|
|
DEBUG_MSG_P(PSTR("[MQTT] Sending %s => %s\n"), topic, message);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void _mqttFlush() {
|
|
|
|
if (_mqtt_queue.size() == 0) return;
|
|
|
|
DynamicJsonBuffer jsonBuffer;
|
|
JsonObject& root = jsonBuffer.createObject();
|
|
for (unsigned char i=0; i<_mqtt_queue.size(); i++) {
|
|
mqtt_message_t element = _mqtt_queue[i];
|
|
root[element.topic] = element.message;
|
|
}
|
|
if (ntpConnected()) root[MQTT_TOPIC_TIME] = ntpDateTime();
|
|
root[MQTT_TOPIC_HOSTNAME] = getSetting("hostname");
|
|
root[MQTT_TOPIC_IP] = getIP();
|
|
|
|
String output;
|
|
root.printTo(output);
|
|
String path = _mqttTopic + String(MQTT_TOPIC_JSON);
|
|
mqttSendRaw(path.c_str(), output.c_str());
|
|
|
|
for (unsigned char i = 0; i < _mqtt_queue.size(); i++) {
|
|
mqtt_message_t element = _mqtt_queue[i];
|
|
free(element.topic);
|
|
free(element.message);
|
|
}
|
|
_mqtt_queue.clear();
|
|
|
|
}
|
|
|
|
void mqttSend(const char * topic, const char * message, bool force) {
|
|
bool useJson = force ? false : getSetting("mqttUseJson", MQTT_USE_JSON).toInt() == 1;
|
|
if (useJson) {
|
|
mqtt_message_t element;
|
|
element.topic = strdup(topic);
|
|
element.message = strdup(message);
|
|
_mqtt_queue.push_back(element);
|
|
mqttFlushTicker.once_ms(MQTT_USE_JSON_DELAY, _mqttFlush);
|
|
} else {
|
|
String path = _mqttTopic + String(topic) + _mqttGetter;
|
|
mqttSendRaw(path.c_str(), message);
|
|
}
|
|
}
|
|
|
|
void mqttSend(const char * topic, const char * message) {
|
|
mqttSend(topic, message, false);
|
|
}
|
|
|
|
void mqttSend(const char * topic, unsigned int index, const char * message, bool force) {
|
|
char buffer[strlen(topic)+5];
|
|
snprintf_P(buffer, sizeof(buffer), PSTR("%s/%d"), topic, index);
|
|
mqttSend(buffer, message, force);
|
|
}
|
|
|
|
void mqttSend(const char * topic, unsigned int index, const char * message) {
|
|
mqttSend(topic, index, message, false);
|
|
}
|
|
|
|
void mqttSubscribeRaw(const char * topic) {
|
|
if (mqtt.connected() && (strlen(topic) > 0)) {
|
|
#if MQTT_USE_ASYNC
|
|
unsigned int packetId = mqtt.subscribe(topic, MQTT_QOS);
|
|
DEBUG_MSG_P(PSTR("[MQTT] Subscribing to %s (PID %d)\n"), topic, packetId);
|
|
#else
|
|
mqtt.subscribe(topic, MQTT_QOS);
|
|
DEBUG_MSG_P(PSTR("[MQTT] Subscribing to %s\n"), topic);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void mqttSubscribe(const char * topic) {
|
|
String path = _mqttTopic + String(topic) + _mqttSetter;
|
|
mqttSubscribeRaw(path.c_str());
|
|
}
|
|
|
|
void mqttRegister(void (*callback)(unsigned int, const char *, const char *)) {
|
|
_mqtt_callbacks.push_back(callback);
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// Callbacks
|
|
// -----------------------------------------------------------------------------
|
|
|
|
void _mqttCallback(unsigned int type, const char * topic, const char * payload) {
|
|
|
|
|
|
if (type == MQTT_CONNECT_EVENT) {
|
|
|
|
mqttSubscribe(MQTT_TOPIC_ACTION);
|
|
|
|
}
|
|
|
|
if (type == MQTT_MESSAGE_EVENT) {
|
|
|
|
// Match topic
|
|
String t = mqttSubtopic((char *) topic);
|
|
|
|
// Actions
|
|
if (t.equals(MQTT_TOPIC_ACTION)) {
|
|
if (strcmp(payload, MQTT_ACTION_RESET) == 0) {
|
|
customReset(CUSTOM_RESET_MQTT);
|
|
ESP.restart();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
void _mqttOnConnect() {
|
|
|
|
DEBUG_MSG_P(PSTR("[MQTT] Connected!\n"));
|
|
|
|
#if MQTT_SKIP_RETAINED
|
|
mqttConnectedAt = millis();
|
|
#endif
|
|
|
|
// Build MQTT topics
|
|
mqttConfigure();
|
|
|
|
// Send first Heartbeat
|
|
heartbeat();
|
|
|
|
// 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_P(PSTR("[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) {
|
|
|
|
if (len == 0) return;
|
|
|
|
char message[len + 1];
|
|
strlcpy(message, (char *) payload, len + 1);
|
|
|
|
#if MQTT_SKIP_RETAINED
|
|
if (millis() - mqttConnectedAt < MQTT_SKIP_TIME) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Received %s => %s - SKIPPED\n"), topic, message);
|
|
return;
|
|
}
|
|
#endif
|
|
DEBUG_MSG_P(PSTR("[MQTT] Received %s => %s\n"), topic, message);
|
|
|
|
// Send message event to subscribers
|
|
for (unsigned char i = 0; i < _mqtt_callbacks.size(); i++) {
|
|
(*_mqtt_callbacks[i])(MQTT_MESSAGE_EVENT, topic, message);
|
|
}
|
|
|
|
}
|
|
|
|
bool fp2array(const char * fingerprint, unsigned char * bytearray) {
|
|
|
|
// check length (20 2-character digits ':'-separated => 20*2+19 = 59)
|
|
if (strlen(fingerprint) != 59) return false;
|
|
|
|
DEBUG_MSG_P(PSTR("[MQTT] Fingerprint %s\n"), fingerprint);
|
|
|
|
// walk the fingerprint
|
|
for (unsigned int i=0; i<20; i++) {
|
|
bytearray[i] = strtol(fingerprint + 3*i, NULL, 16);
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
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_P(PSTR("[MQTT] MQTT_MAX_TRIES met, disconnecting from WiFi\n"));
|
|
wifiDisconnect();
|
|
tries = 0;
|
|
return;
|
|
}
|
|
} else {
|
|
tries = 0;
|
|
}
|
|
last_try = millis();
|
|
#endif
|
|
|
|
mqtt.disconnect();
|
|
|
|
if (_mqttUser) free(_mqttUser);
|
|
if (_mqttPass) free(_mqttPass);
|
|
|
|
char * host = strdup(getSetting("mqttServer", MQTT_SERVER).c_str());
|
|
unsigned int port = getSetting("mqttPort", MQTT_PORT).toInt();
|
|
_mqttUser = strdup(getSetting("mqttUser").c_str());
|
|
_mqttPass = strdup(getSetting("mqttPassword").c_str());
|
|
if (_mqttWill) free(_mqttWill);
|
|
_mqttWill = strdup((_mqttTopic + MQTT_TOPIC_STATUS).c_str());
|
|
|
|
DEBUG_MSG_P(PSTR("[MQTT] Connecting to broker at %s:%d"), host, port);
|
|
mqtt.setServer(host, port);
|
|
|
|
#if MQTT_USE_ASYNC
|
|
|
|
mqtt.setKeepAlive(MQTT_KEEPALIVE).setCleanSession(false);
|
|
mqtt.setWill(_mqttWill, MQTT_QOS, MQTT_RETAIN, "0");
|
|
if ((strlen(_mqttUser) > 0) && (strlen(_mqttPass) > 0)) {
|
|
DEBUG_MSG_P(PSTR(" as user '%s'."), _mqttUser);
|
|
mqtt.setCredentials(_mqttUser, _mqttPass);
|
|
}
|
|
DEBUG_MSG_P(PSTR("\n"));
|
|
|
|
#if ASYNC_TCP_SSL_ENABLED
|
|
bool secure = getSetting("mqttUseSSL", MQTT_SSL_ENABLED).toInt() == 1;
|
|
mqtt.setSecure(secure);
|
|
if (secure) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Using SSL\n"));
|
|
unsigned char fp[20];
|
|
if (fp2array(getSetting("mqttFP", MQTT_SSL_FINGERPRINT).c_str(), fp)) {
|
|
mqtt.addServerFingerprint(fp);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
mqtt.connect();
|
|
|
|
#else
|
|
|
|
bool response;
|
|
|
|
if ((strlen(_mqttUser) > 0) && (strlen(_mqttPass) > 0)) {
|
|
DEBUG_MSG_P(PSTR(" as user '%s'\n"), _mqttUser);
|
|
response = mqtt.connect(getIdentifier().c_str(), _mqttUser, _mqttPass, _mqttWill, MQTT_QOS, MQTT_RETAIN, "0");
|
|
} else {
|
|
DEBUG_MSG_P(PSTR("\n"));
|
|
response = mqtt.connect(getIdentifier().c_str(), _mqttWill, MQTT_QOS, MQTT_RETAIN, "0");
|
|
}
|
|
|
|
if (response) {
|
|
_mqttOnConnect();
|
|
_mqttConnected = true;
|
|
} else {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Connection failed\n"));
|
|
}
|
|
|
|
#endif
|
|
|
|
free(host);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
void mqttConfigure() {
|
|
// Replace identifier
|
|
_mqttTopic = getSetting("mqttTopic", MQTT_TOPIC);
|
|
_mqttTopic.replace("{identifier}", getSetting("hostname"));
|
|
if (!_mqttTopic.endsWith("/")) _mqttTopic = _mqttTopic + "/";
|
|
_mqttSetter = getSetting("mqttSetter", MQTT_USE_SETTER);
|
|
_mqttGetter = getSetting("mqttGetter", MQTT_USE_GETTER);
|
|
_mqttForward = !_mqttGetter.equals(_mqttSetter);
|
|
}
|
|
|
|
void mqttSetup() {
|
|
#if MQTT_USE_ASYNC
|
|
mqtt.onConnect([](bool sessionPresent) {
|
|
_mqttOnConnect();
|
|
});
|
|
mqtt.onDisconnect([](AsyncMqttClientDisconnectReason reason) {
|
|
if (reason == AsyncMqttClientDisconnectReason::TCP_DISCONNECTED) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] TCP Disconnected\n"));
|
|
}
|
|
if (reason == AsyncMqttClientDisconnectReason::MQTT_IDENTIFIER_REJECTED) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Identifier Rejected\n"));
|
|
}
|
|
if (reason == AsyncMqttClientDisconnectReason::MQTT_SERVER_UNAVAILABLE) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Server unavailable\n"));
|
|
}
|
|
if (reason == AsyncMqttClientDisconnectReason::MQTT_MALFORMED_CREDENTIALS) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Malformed credentials\n"));
|
|
}
|
|
if (reason == AsyncMqttClientDisconnectReason::MQTT_NOT_AUTHORIZED) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Not authorized\n"));
|
|
}
|
|
#if ASYNC_TCP_SSL_ENABLED
|
|
if (reason == AsyncMqttClientDisconnectReason::TLS_BAD_FINGERPRINT) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Bad fingerprint\n"));
|
|
}
|
|
#endif
|
|
_mqttOnDisconnect();
|
|
});
|
|
mqtt.onMessage([](char* topic, char* payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {
|
|
_mqttOnMessage(topic, payload, len);
|
|
});
|
|
mqtt.onSubscribe([](uint16_t packetId, uint8_t qos) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Subscribe ACK for PID %d\n"), packetId);
|
|
});
|
|
mqtt.onPublish([](uint16_t packetId) {
|
|
DEBUG_MSG_P(PSTR("[MQTT] Publish ACK for PID %d\n"), packetId);
|
|
});
|
|
#else
|
|
mqtt.setCallback([](char* topic, byte* payload, unsigned int length) {
|
|
_mqttOnMessage(topic, (char *) payload, length);
|
|
});
|
|
#endif
|
|
|
|
mqttRegister(_mqttCallback);
|
|
|
|
}
|
|
|
|
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
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|