kopia lustrzana https://github.com/jgromes/RadioLib
ESP8266 - implemented MQTT clean session and will
Jan Gromeš
rodzic
79e63ceafd
commit
c8783b599b
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@ -291,44 +291,96 @@ uint16_t ESP8266::HttpPost(const char* url, const char* content, String& respons
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return(atoi(statusStr));
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}
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uint8_t ESP8266::MqttConnect(const char* host, const char* clientId, const char* username, const char* password) {
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uint8_t ESP8266::MqttConnect(const char* host, const char* clientId, const char* userName, const char* password, uint16_t keepAlive, bool cleanSession, const char* willTopic, const char* willMessage) {
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// encode packet length
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uint32_t len = strlen(clientId) + strlen(username) + strlen(password) + 16;
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size_t clientIdLen = strlen(clientId);
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size_t userNameLen = strlen(userName);
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size_t passwordLen = strlen(password);
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size_t willTopicLen = strlen(willTopic);
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size_t willMessageLen = strlen(willMessage);
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uint32_t len = 10 + 2 + clientIdLen;
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if(userNameLen > 0) {
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len += 2 + userNameLen;
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}
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if(passwordLen > 0) {
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len += 2 + passwordLen;
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}
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if((willTopicLen > 0) && (willMessageLen > 0)) {
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len += 4 + willTopicLen + willMessageLen;
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}
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uint8_t encoded[] = {0, 0, 0, 0};
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size_t encodedBytes = MqttEncodeLength(len, encoded);
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// build the CONNECT packet
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uint8_t* packet = new uint8_t[len + encodedBytes + 2];
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// fixed header
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packet[0] = (MQTT_CONNECT << 4) & 0xFF;
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memcpy(packet + 1, encoded, encodedBytes);
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packet[encodedBytes + 1] = 0x00;
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packet[encodedBytes + 2] = 0x04;
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packet[encodedBytes + 3] = 'M';
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packet[encodedBytes + 4] = 'Q';
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packet[encodedBytes + 5] = 'T';
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packet[encodedBytes + 6] = 'T';
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// variable header
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// protocol name
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size_t pos = encodedBytes + 1;
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packet[pos++] = 0x00;
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packet[pos++] = 0x04;
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memcpy(packet + pos, "MQTT", 4);
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pos += 4;
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packet[encodedBytes + 7] = 0x04; // protocol level
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packet[encodedBytes + 8] = 0b11000010; // flags: user name + password + clean session
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// protocol level
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packet[pos++] = 0x04;
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packet[encodedBytes + 9] = 0x00; // keep-alive interval MSB
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packet[encodedBytes + 10] = 0x3C; // keep-alive interval LSB
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// flags
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packet[pos++] = 0x00;
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if(cleanSession) {
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packet[encodedBytes + 8] |= MQTT_CONNECT_CLEAN_SESSION;
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}
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packet[encodedBytes + 11] = (strlen(clientId) & 0xFF00) >> 8;
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packet[encodedBytes + 12] = strlen(clientId) & 0x00FF;
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memcpy(encodedBytes + packet + 13, clientId, strlen(clientId));
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// keep alive interval in seconds
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packet[pos++] = (keepAlive & 0xFF00) >> 8;
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packet[pos++] = keepAlive & 0x00FF;
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packet[encodedBytes + 13 + strlen(clientId)] = (strlen(username) & 0xFF00) >> 8;
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packet[encodedBytes + 14 + strlen(clientId)] = strlen(username) & 0x00FF;
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memcpy(encodedBytes + packet + 15 + strlen(clientId), username, strlen(username));
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// payload
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// clientId
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packet[pos++] = (clientIdLen & 0xFF00) >> 8;
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packet[pos++] = clientIdLen & 0x00FF;
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memcpy(packet + pos, clientId, clientIdLen);
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pos += clientIdLen;
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packet[encodedBytes + 15 + strlen(clientId) + strlen(username)] = (strlen(password) & 0xFF00) >> 8;;
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packet[encodedBytes + 16 + strlen(clientId) + strlen(username)] = strlen(password) & 0x00FF;
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memcpy(encodedBytes + packet + 17 + strlen(clientId) + strlen(username), password, strlen(password));
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// will topic and message
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if((willTopicLen > 0) && (willMessageLen > 0)) {
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packet[encodedBytes + 8] |= MQTT_CONNECT_WILL_FLAG;
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packet[pos++] = (willTopicLen & 0xFF00) >> 8;
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packet[pos++] = willTopicLen & 0x00FF;
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memcpy(packet + pos, willTopic, willTopicLen);
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pos += willTopicLen;
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packet[pos++] = (willMessageLen & 0xFF00) >> 8;
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packet[pos++] = willMessageLen & 0x00FF;
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memcpy(packet + pos, willMessage, willMessageLen);
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pos += willMessageLen;
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}
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// user name
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if(userNameLen > 0) {
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packet[encodedBytes + 8] |= MQTT_CONNECT_USER_NAME_FLAG;
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packet[pos++] = (userNameLen & 0xFF00) >> 8;
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packet[pos++] = userNameLen & 0x00FF;
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memcpy(packet + pos, userName, userNameLen);
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pos += userNameLen;
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}
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// password
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if(passwordLen > 0) {
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packet[encodedBytes + 8] |= MQTT_CONNECT_PASSWORD_FLAG;
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packet[pos++] = (passwordLen & 0xFF00) >> 8;;
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packet[pos++] = passwordLen & 0x00FF;
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memcpy(packet + pos, password, passwordLen);
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pos += passwordLen;
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}
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// create TCP connection
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uint8_t state = openTransportConnection(host, "TCP", portMqtt, 7200);
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uint8_t state = openTransportConnection(host, "TCP", portMqtt, keepAlive);
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if(state != ERR_NONE) {
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delete[] packet;
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return(state);
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@ -362,19 +414,30 @@ uint8_t ESP8266::MqttConnect(const char* host, const char* clientId, const char*
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uint8_t ESP8266::MqttPublish(const char* topic, const char* message) {
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// encode packet length
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uint32_t len = 2 + strlen(topic) + strlen(message);
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size_t topicLen = strlen(topic);
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size_t messageLen = strlen(message);
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uint32_t len = 2 + topicLen + messageLen;
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uint8_t encoded[] = {0, 0, 0, 0};
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size_t encodedBytes = MqttEncodeLength(len, encoded);
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// build the PUBLISH packet
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uint8_t* packet = new uint8_t[len + 2];
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// fixed header
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packet[0] = (MQTT_PUBLISH << 4);
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memcpy(packet + 1, encoded, encodedBytes);
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packet[encodedBytes + 1] = (strlen(topic) & 0xFF00) >> 8;
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packet[encodedBytes + 2] = strlen(topic) & 0x00FF;
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memcpy(encodedBytes + packet + 3, topic, strlen(topic));
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memcpy(encodedBytes + packet + 3 + strlen(topic), message, strlen(message));
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// variable header
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// topic name
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size_t pos = encodedBytes + 1;
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packet[pos++] = (topicLen & 0xFF00) >> 8;
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packet[pos++] = topicLen & 0x00FF;
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memcpy(packet + pos, topic, topicLen);
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pos += topicLen;
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// message
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memcpy(packet + pos, message, messageLen);
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pos += messageLen;
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// send MQTT packet
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uint8_t state = send(packet, len + 2);
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@ -19,6 +19,13 @@
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#define MQTT_PINGRESP 0x0D
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#define MQTT_DISCONNECT 0x0E
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// MQTT CONNECT flags
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#define MQTT_CONNECT_USER_NAME_FLAG 0b10000000
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#define MQTT_CONNECT_PASSWORD_FLAG 0b01000000
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#define MQTT_CONNECT_WILL_RETAIN 0b00100000
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#define MQTT_CONNECT_WILL_FLAG 0b00000100
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#define MQTT_CONNECT_CLEAN_SESSION 0b00000010
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class ESP8266 {
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public:
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ESP8266(Module* module);
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@ -36,7 +43,7 @@ class ESP8266 {
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uint16_t HttpPost(const char* url, const char* content, String& response, const char* contentType = "text/plain");
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// MQTT methods
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uint8_t MqttConnect(const char* host, const char* clientId, const char* username, const char* password);
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uint8_t MqttConnect(const char* host, const char* clientId, const char* userName = "", const char* password = "", uint16_t keepAlive = 60, bool cleanSession = true, const char* willTopic = "", const char* willMessage = "");
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uint8_t MqttPublish(const char* topic, const char* message);
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// Transport layer methods
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