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Fork of the espurna firmware for `mhsw` switches
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mhsw-espurna/code/espurna/relay.ino

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/*
ESPurna
RELAY MODULE
Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
*/
#include <EEPROM.h>
#include <ArduinoJson.h>
#include <vector>
typedef struct {
unsigned char pin;
bool reverse;
} relay_t;
std::vector<relay_t> _relays;
bool recursive = false;
#ifdef SONOFF_DUAL
unsigned char dualRelayStatus = 0;
#endif
// -----------------------------------------------------------------------------
// RELAY
// -----------------------------------------------------------------------------
void relayMQTT(unsigned char id) {
if (id >= _relays.size()) return;
String mqttGetter = getSetting("mqttGetter", MQTT_USE_GETTER);
char buffer[strlen(MQTT_RELAY_TOPIC) + mqttGetter.length() + 3];
sprintf(buffer, "%s/%d%s", MQTT_RELAY_TOPIC, id, mqttGetter.c_str());
mqttSend(buffer, relayStatus(id) ? "1" : "0");
}
void relayMQTT() {
for (unsigned int i=0; i < _relays.size(); i++) {
relayMQTT(i);
}
}
String relayString() {
DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
JsonArray& relay = root.createNestedArray("relayStatus");
for (unsigned char i=0; i<relayCount(); i++) {
relay.add(relayStatus(i));
}
String output;
root.printTo(output);
return output;
}
void relayWS() {
String output = relayString();
wsSend((char *) output.c_str());
}
bool relayStatus(unsigned char id) {
#ifdef SONOFF_DUAL
if (id >= 2) return false;
return ((dualRelayStatus & (1 << id)) > 0);
#else
if (id >= _relays.size()) return false;
bool status = (digitalRead(_relays[id].pin) == HIGH);
return _relays[id].reverse ? !status : status;
#endif
}
bool relayStatus(unsigned char id, bool status, bool report) {
if (id >= _relays.size()) return false;
bool changed = false;
if (relayStatus(id) != status) {
DEBUG_MSG("[RELAY] %d => %s\n", id, status ? "ON" : "OFF");
changed = true;
#ifdef SONOFF_DUAL
dualRelayStatus ^= (1 << id);
Serial.flush();
Serial.write(0xA0);
Serial.write(0x04);
Serial.write(dualRelayStatus);
Serial.write(0xA1);
Serial.flush();
#else
digitalWrite(_relays[id].pin, _relays[id].reverse ? !status : status);
#endif
if (!recursive) {
relaySync(id);
relaySave();
}
#ifdef ENABLE_DOMOTICZ
domoticzSend(id);
#endif
}
if (report) relayMQTT(id);
if (!recursive) relayWS();
return changed;
}
bool relayStatus(unsigned char id, bool status) {
if (id >= _relays.size()) return false;
return relayStatus(id, status, true);
}
void relaySync(unsigned char id) {
if (_relays.size() > 1) {
recursive = true;
byte relaySync = getSetting("relaySync", RELAY_SYNC).toInt();
bool status = relayStatus(id);
// If RELAY_SYNC_SAME all relays should have the same state
if (relaySync == RELAY_SYNC_SAME) {
for (unsigned short i=0; i<_relays.size(); i++) {
if (i != id) relayStatus(i, status);
}
// If NONE_OR_ONE or ONE and setting ON we should set OFF all the others
} else if (status) {
if (relaySync != RELAY_SYNC_ANY) {
for (unsigned short i=0; i<_relays.size(); i++) {
if (i != id) relayStatus(i, false);
}
}
// If ONLY_ONE and setting OFF we should set ON the other one
} else {
if (relaySync == RELAY_SYNC_ONE) {
unsigned char i = (id + 1) % _relays.size();
relayStatus(i, true);
}
}
recursive = false;
}
}
void relaySave() {
unsigned char bit = 1;
unsigned char mask = 0;
for (unsigned int i=0; i < _relays.size(); i++) {
if (relayStatus(i)) mask += bit;
bit += bit;
}
EEPROM.write(0, mask);
EEPROM.commit();
}
void relayRetrieve() {
recursive = true;
unsigned char bit = 1;
unsigned char mask = EEPROM.read(0);
for (unsigned int i=0; i < _relays.size(); i++) {
relayStatus(i, ((mask & bit) == bit));
bit += bit;
}
recursive = false;
}
void relayToggle(unsigned char id) {
if (id >= _relays.size()) return;
relayStatus(id, !relayStatus(id));
}
unsigned char relayCount() {
return _relays.size();
}
void relayMQTTCallback(unsigned int type, const char * topic, const char * payload) {
String mqttSetter = getSetting("mqttSetter", MQTT_USE_SETTER);
String mqttGetter = getSetting("mqttGetter", MQTT_USE_GETTER);
bool sameSetGet = mqttGetter.compareTo(mqttSetter) == 0;
if (type == MQTT_CONNECT_EVENT) {
relayMQTT();
char buffer[strlen(MQTT_RELAY_TOPIC) + mqttSetter.length() + 3];
sprintf(buffer, "%s/+%s", MQTT_RELAY_TOPIC, mqttSetter.c_str());
mqttSubscribe(buffer);
}
if (type == MQTT_MESSAGE_EVENT) {
// Match topic
String t = String(topic + mqttTopicRootLength());
if (!t.startsWith(MQTT_RELAY_TOPIC)) return;
if (!t.endsWith(mqttSetter)) return;
// Get relay ID
unsigned int relayID = topic[strlen(topic) - mqttSetter.length() - 1] - '0';
if (relayID >= relayCount()) {
DEBUG_MSG("[RELAY] Wrong relayID (%d)\n", relayID);
return;
}
// Action to perform
unsigned int value = (char)payload[0] - '0';
if (value == 2) {
relayToggle(relayID);
} else {
relayStatus(relayID, value > 0, !sameSetGet);
}
}
}
void relaySetup() {
#ifdef SONOFF_DUAL
// Two dummy relays for the dual
_relays.push_back((relay_t) {0, 0});
_relays.push_back((relay_t) {0, 0});
#else
#ifdef RELAY1_PIN
_relays.push_back((relay_t) { RELAY1_PIN, RELAY1_PIN_INVERSE });
#endif
#ifdef RELAY2_PIN
_relays.push_back((relay_t) { RELAY2_PIN, RELAY2_PIN_INVERSE });
#endif
#ifdef RELAY3_PIN
_relays.push_back((relay_t) { RELAY3_PIN, RELAY3_PIN_INVERSE });
#endif
#ifdef RELAY4_PIN
_relays.push_back((relay_t) { RELAY4_PIN, RELAY4_PIN_INVERSE });
#endif
#endif
EEPROM.begin(4096);
byte relayMode = getSetting("relayMode", RELAY_MODE).toInt();
for (unsigned int i=0; i < _relays.size(); i++) {
pinMode(_relays[i].pin, OUTPUT);
if (relayMode == RELAY_MODE_OFF) relayStatus(i, false);
if (relayMode == RELAY_MODE_ON) relayStatus(i, true);
}
if (relayMode == RELAY_MODE_SAME) relayRetrieve();
mqttRegister(relayMQTTCallback);
DEBUG_MSG("[RELAY] Number of relays: %d\n", _relays.size());
}