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115 lines
2.6 KiB
115 lines
2.6 KiB
/*
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UART_MQTT MODULE
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Copyright (C) 2018 by Albert Weterings
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Adapted by Xose Pérez <xose dot perez at gmail dot com>
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Module key prefix: u2m
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*/
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#if UART_MQTT_SUPPORT
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char _uartmqttBuffer[UART_MQTT_BUFFER_SIZE];
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bool _uartmqttNewData = false;
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#if UART_MQTT_USE_SOFT
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#include <SoftwareSerial.h>
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SoftwareSerial _uart_mqtt_serial(UART_MQTT_RX_PIN, UART_MQTT_TX_PIN, false, UART_MQTT_BUFFER_SIZE);
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#define UART_MQTT_PORT _uart_mqtt_serial
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#else
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#define UART_MQTT_PORT UART_MQTT_HW_PORT
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#endif
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// -----------------------------------------------------------------------------
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// Private
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// -----------------------------------------------------------------------------
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void _uartmqttReceiveUART() {
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static unsigned char ndx = 0;
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while (UART_MQTT_PORT.available() > 0 && _uartmqttNewData == false) {
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char rc = UART_MQTT_PORT.read();
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if (rc != UART_MQTT_TERMINATION) {
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_uartmqttBuffer[ndx] = rc;
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if (ndx < UART_MQTT_BUFFER_SIZE - 1) ndx++;
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} else {
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_uartmqttBuffer[ndx] = '\0';
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_uartmqttNewData = true;
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ndx = 0;
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}
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}
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}
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void _uartmqttSendMQTT() {
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if (_uartmqttNewData == true && MQTT_SUPPORT) {
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DEBUG_MSG_P(PSTR("[UART_MQTT] Send data over MQTT: %s\n"), _uartmqttBuffer);
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mqttSend(MQTT_TOPIC_UARTIN, _uartmqttBuffer);
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_uartmqttNewData = false;
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}
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}
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void _uartmqttSendUART(const char * message) {
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DEBUG_MSG_P(PSTR("[UART_MQTT] Send data over UART: %s\n"), message);
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UART_MQTT_PORT.println(message);
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}
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void _uartmqttMQTTCallback(unsigned int type, const char * topic, const char * payload) {
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if (type == MQTT_CONNECT_EVENT) {
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mqttSubscribe(MQTT_TOPIC_UARTOUT);
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}
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if (type == MQTT_MESSAGE_EVENT) {
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// Match topic
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String t = mqttMagnitude((char *) topic);
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if (t.equals(MQTT_TOPIC_UARTOUT)) {
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_uartmqttSendUART(payload);
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}
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}
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}
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bool _uartmqttKeyCheck(const char * key) {
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return (strncmp(key, "u2m", 3) == 0);
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}
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// -----------------------------------------------------------------------------
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// SETUP & LOOP
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// -----------------------------------------------------------------------------
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void _uartmqttLoop() {
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_uartmqttReceiveUART();
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_uartmqttSendMQTT();
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}
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void uartmqttSetup() {
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// Init port
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UART_MQTT_PORT.begin(UART_MQTT_BAUDRATE);
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// Register MQTT callbackj
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mqttRegister(_uartmqttMQTTCallback);
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// Register key check
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settingsRegisterKeyCheck(_uartmqttKeyCheck);
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// Register loop
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espurnaRegisterLoop(_uartmqttLoop);
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}
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#endif // UART_MQTT_SUPPORT
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