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315 lines
8.2 KiB
315 lines
8.2 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 ITEAD_SONOFF_RFBRIDGE
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// -----------------------------------------------------------------------------
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// DEFINITIONS
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// -----------------------------------------------------------------------------
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#define RF_MESSAGE_SIZE 9
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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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// -----------------------------------------------------------------------------
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// GLOBALS TO THE MODULE
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// -----------------------------------------------------------------------------
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unsigned char _uartbuf[RF_MESSAGE_SIZE+3] = {0};
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unsigned char _uartpos = 0;
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unsigned char _learnId = 0;
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bool _learnStatus = true;
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bool _rfbin = false;
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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.println();
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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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Serial.println();
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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.println();
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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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Serial.println();
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#if WEB_SUPPORT
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char buffer[100];
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snprintf_P(wsb, strlen(buffer), PSTR("{\"action\": \"rfbLearn\", \"data\":{\"id\": %d, \"status\": %d}}"), _learnId, _learnStatus ? 1 : 0);
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wsSend(buffer);
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#endif
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}
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void _rfbSend(byte * message) {
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Serial.println();
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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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Serial.println();
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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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#if WEB_SUPPORT
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wsSend("{\"action\": \"rfbTimeout\"}");
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#endif
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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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DEBUG_MSG_P(PSTR("[RFBRIDGE] Learn success\n"));
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rfbStore(_learnId, _learnStatus, buffer);
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// Websocket update
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#if WEB_SUPPORT
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char wsb[100];
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sprintf_P(wsb, strlen(wsb), PSTR("{\"rfb\":[{\"id\": %d, \"status\": %d, \"data\": \"%s\"}]}"), _learnId, _learnStatus ? 1 : 0, buffer);
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wsSend(wsb);
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#endif
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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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// Look for the code
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unsigned char id, status;
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bool found = false;
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for (id=0; id<relayCount(); id++) {
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for (status=0; status<2; status++) {
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String code = rfbRetrieve(id, status == 1);
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if (code.length()) {
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if (code.endsWith(&buffer[12])) {
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found = true;
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break;
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}
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}
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}
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if (found) break;
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}
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if (found) {
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_rfbin = true;
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relayStatus(id, status == 1);
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}
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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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bool _rfbCompare(const char * code1, const char * code2) {
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return strcmp(&code1[12], &code2[12]) == 0;
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}
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bool _rfbSameOnOff(unsigned char id) {
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return _rfbCompare(rfbRetrieve(id, true).c_str(), rfbRetrieve(id, false).c_str());
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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_P(&out[p*2], PSTR("%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_P(buffer, PSTR("%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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_learnStatus = (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, 1);
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}
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}
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}
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}
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// -----------------------------------------------------------------------------
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// PUBLIC
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// -----------------------------------------------------------------------------
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void rfbStore(unsigned char id, bool status, const char * code) {
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DEBUG_MSG_P(PSTR("[RFBRIDGE] Storing %d-%s => '%s'\n"), id, status ? "ON" : "OFF", code);
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char key[8] = {0};
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sprintf_P(key, PSTR("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_P(key, PSTR("rfb%d%s"), id, status ? "on" : "off");
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return getSetting(key);
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}
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void rfbStatus(unsigned char id, bool status) {
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String value = rfbRetrieve(id, status);
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if (value.length() > 0) {
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bool same = _rfbSameOnOff(id);
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byte message[RF_MESSAGE_SIZE];
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_rfbToArray(value.c_str(), message);
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unsigned char times = RF_SEND_TIMES;
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if (same) times = _rfbin ? 0 : 1;
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_rfbSend(message, 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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_learnStatus = 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_P(key, PSTR("rfb%d%s"), id, status ? "on" : "off");
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delSetting(key);
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// Websocket update
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#if WEB_SUPPORT
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char wsb[100];
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snprintf_P(wsb, strlen(wsb), PSTR("{\"rfb\":[{\"id\": %d, \"status\": %d, \"data\": \"\"}]}"), id, status ? 1 : 0);
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wsSend(wsb);
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#endif
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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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