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242 lines
6.1 KiB
242 lines
6.1 KiB
/*
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ITEAD RF BRIDGE MODULE
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Copyright (C) 2017 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#ifdef SONOFF_RFBRIDGE
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#define RF_MESSAGE_SIZE 9
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#define RF_BUFFER_SIZE 12
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#define RF_SEND_TIMES 3
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#define RF_SEND_DELAY 50
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#define RF_CODE_START 0xAA
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#define RF_CODE_ACK 0xA0
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#define RF_CODE_LEARN 0xA1
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#define RF_CODE_LEARN_KO 0xA2
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#define RF_CODE_LEARN_OK 0xA3
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#define RF_CODE_RFIN 0xA4
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#define RF_CODE_RFOUT 0xA5
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#define RF_CODE_STOP 0x55
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unsigned char _uartbuf[RF_BUFFER_SIZE] = {0};
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unsigned char _uartpos = 0;
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unsigned char _learnId = 0;
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bool _learnState = true;
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// -----------------------------------------------------------------------------
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// PRIVATES
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// -----------------------------------------------------------------------------
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void _rfbAck() {
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Sending ACK\n"));
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Serial.write(RF_CODE_START);
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Serial.write(RF_CODE_ACK);
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Serial.write(RF_CODE_STOP);
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Serial.flush();
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}
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void _rfbLearn() {
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Sending LEARN\n"));
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Serial.write(RF_CODE_START);
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Serial.write(RF_CODE_LEARN);
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Serial.write(RF_CODE_STOP);
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Serial.flush();
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}
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void _rfbSend(byte * message) {
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Serial.write(RF_CODE_START);
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Serial.write(RF_CODE_RFOUT);
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for (unsigned char j=0; j<RF_MESSAGE_SIZE; j++) {
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Serial.write(message[j]);
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}
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Serial.write(RF_CODE_STOP);
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Serial.flush();
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}
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void _rfbSend(byte * message, int times) {
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char buffer[RF_MESSAGE_SIZE];
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_rfbToChar(message, buffer);
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Sending MESSAGE '%s' %d time(s)\n"), buffer, times);
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for (int i=0; i<times; i++) {
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if (i>0) {
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unsigned long start = millis();
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while (millis() - start < RF_SEND_DELAY) delay(1);
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}
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_rfbSend(message);
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}
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}
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void _rfbDecode() {
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byte action = _uartbuf[0];
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char buffer[RF_MESSAGE_SIZE * 2 + 1] = {0};
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Action 0x%02X\n"), action);
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if (action == RF_CODE_LEARN_KO) {
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_rfbAck();
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Learn timeout\n"));
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}
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if (action == RF_CODE_LEARN_OK || action == RF_CODE_RFIN) {
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_rfbToChar(&_uartbuf[1], buffer);
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mqttSend(MQTT_TOPIC_RFIN, buffer);
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_rfbAck();
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}
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if (action == RF_CODE_LEARN_OK) {
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// TODO: notify websocket
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_rfbStore(_learnId, _learnState, buffer);
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Learn success. Storing %d-%s => '%s'\n"), _learnId, _learnState ? "ON" : "OFF", buffer);
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}
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if (action == RF_CODE_RFIN) {
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Forward message '%s'\n"), buffer);
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}
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}
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void _rfbReceive() {
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static bool receiving = false;
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while (Serial.available()) {
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yield();
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byte c = Serial.read();
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//DEBUG_MSG_P(PSTR("[RFBRIDGE] Received 0x%02X\n"), c);
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if (receiving) {
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if (c == RF_CODE_STOP) {
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_rfbDecode();
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receiving = false;
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} else {
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_uartbuf[_uartpos++] = c;
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}
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} else if (c == RF_CODE_START) {
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_uartpos = 0;
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receiving = true;
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}
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}
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}
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/*
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From an hexa char array ("A220EE...") to a byte array (half the size)
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*/
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bool _rfbToArray(const char * in, byte * out) {
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if (strlen(in) != RF_MESSAGE_SIZE * 2) return false;
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char tmp[3] = {0};
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for (unsigned char p = 0; p<RF_MESSAGE_SIZE; p++) {
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memcpy(tmp, &in[p*2], 2);
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out[p] = strtol(tmp, NULL, 16);
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}
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return true;
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}
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/*
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From a byte array to an hexa char array ("A220EE...", double the size)
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*/
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bool _rfbToChar(byte * in, char * out) {
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for (unsigned char p = 0; p<RF_MESSAGE_SIZE; p++) {
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sprintf(&out[p*2], "%02X", in[p]);
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}
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return true;
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}
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void _rfbMqttCallback(unsigned int type, const char * topic, const char * payload) {
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if (type == MQTT_CONNECT_EVENT) {
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char buffer[strlen(MQTT_TOPIC_RFLEARN) + 3];
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sprintf(buffer, "%s/+", MQTT_TOPIC_RFLEARN);
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mqttSubscribe(buffer);
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mqttSubscribe(MQTT_TOPIC_RFOUT);
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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 = mqttSubtopic((char *) topic);
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// Check if should go into learn mode
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if (t.startsWith(MQTT_TOPIC_RFLEARN)) {
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_learnId = t.substring(strlen(MQTT_TOPIC_RFLEARN)+1).toInt();
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if (_learnId >= relayCount()) {
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Wrong learnID (%d)\n"), _learnId);
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return;
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}
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_learnState = (char)payload[0] != '0';
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_rfbLearn();
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}
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if (t.equals(MQTT_TOPIC_RFOUT)) {
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byte message[RF_MESSAGE_SIZE];
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if (_rfbToArray(payload, message)) {
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_rfbSend(message, RF_SEND_TIMES);
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}
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}
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}
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}
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void _rfbStore(unsigned char id, bool status, char * code) {
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char key[8] = {0};
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sprintf(key, "rfb%d%s", id, status ? "on" : "off");
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setSetting(key, code);
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}
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String _rfbRetrieve(unsigned char id, bool status) {
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char key[8] = {0};
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sprintf(key, "rfb%d%s", id, status ? "on" : "off");
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return getSetting(key);
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}
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// -----------------------------------------------------------------------------
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// PUBLIC
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// -----------------------------------------------------------------------------
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void rfbState(unsigned char id, bool status) {
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String value = _rfbRetrieve(id, status);
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Retrieving value for %d-%s => %s\n"), id, status ? "ON" : "OFF", value.c_str());
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if (value.length() > 0) {
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byte message[RF_MESSAGE_SIZE];
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_rfbToArray(value.c_str(), message);
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_rfbSend(message, RF_SEND_TIMES);
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}
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}
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void rfbLearn(unsigned char id, bool status) {
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_learnId = id;
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_learnState = status;
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_rfbLearn();
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}
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void rfbForget(unsigned char id, bool status) {
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char key[8] = {0};
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sprintf(key, "rfb%d%s", id, status ? "on" : "off");
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delSetting(key);
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}
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// -----------------------------------------------------------------------------
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// SETUP & LOOP
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// -----------------------------------------------------------------------------
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void rfbSetup() {
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mqttRegister(_rfbMqttCallback);
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}
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void rfbLoop() {
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_rfbReceive();
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}
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#endif
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