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Copy pathGree_YAC.cpp
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Gree_YAC.cpp
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#include <Arduino.h>
bool decodeGree_YAC(byte *bytes, int pulseCount)
{
// If this looks like a Gree code...
if ( pulseCount == 19 ) {
Serial.println(F("Looks like a Gree YAC protocol for I-Feel"));
Serial.print(F("I-Feel Temperature: "));
Serial.println(bytes[0]);
return true;
}
if ( pulseCount == 142 || pulseCount == 161 ) {
Serial.println(F("Looks like a Gree YAC protocol"));
// Check if the checksum matches
uint8_t checksum0 = (
(bytes[0] & 0x0F) +
(bytes[1] & 0x0F) +
(bytes[2] & 0x0F) +
(bytes[3] & 0x0F) +
((bytes[4] & 0xF0) >> 4) +
((bytes[5] & 0xF0) >> 4) +
((bytes[6] & 0xF0) >> 4) +
0x0A) & 0xF;
uint8_t checksum1 = (
(bytes[8] & 0x0F) +
(bytes[9] & 0x0F) +
(bytes[10] & 0x0F) +
(bytes[11] & 0x0F) +
((bytes[12] & 0xF0) >> 4) +
((bytes[13] & 0xF0) >> 4) +
((bytes[14] & 0xF0) >> 4) +
0x0A) & 0xF;
//byte 7[7:4] contais checksum for bytes 0-6
//byte 15[7:4] contais checksum for bytes 8-14
if ((checksum0 == (bytes[7]>>4)) && (checksum1 == (bytes[15]>>4))) {
Serial.println(F("Checksum matches"));
} else {
Serial.println(F("Checksum does not match"));
}
// Power mode
// in bytes[0] and bytes[8]
if (bytes[0] == bytes[8]){
switch (bytes[0] & 0x08) {
case 0x00:
Serial.println(F("POWER OFF"));
break;
case 0x08:
Serial.println(F("POWER ON"));
break;
}
}
// Eco mode (8C)
// bit2 of byte 7 (bits 7:4 are checksum)
switch (bytes[7] & 0x04) {
case 0x00:
Serial.println(F("ECO OFF"));
break;
case 0x04:
Serial.println(F("ECO ON"));
break;
}
// Turbo mode
// byte[2] bit 4
switch (bytes[2] & 0x10) {
case 0x00:
Serial.println(F("TURBO OFF"));
break;
case 0x10:
Serial.println(F("TURBO ON"));
break;
}
// Operating mode
// in bytes[0] and bytes[8]
if (bytes[0] == bytes[8]){
switch (bytes[0] & 0x07) {
case 0x00:
Serial.println(F("MODE AUTO"));
break;
case 0x04:
Serial.println(F("MODE HEAT"));
break;
case 0x01:
Serial.println(F("MODE COOL"));
break;
case 0x02:
Serial.println(F("MODE DRY"));
break;
case 0x03:
Serial.println(F("MODE FAN"));
break;
}
}
// Temperature
// temp in two identical bytes 1 and 9, bits [3:0]
// bits [7:4] are used with timers but can be left as 0
if (bytes[1]==bytes[9]){
Serial.print(F("Temperature: "));
Serial.println((bytes[1] & 0x0F) + 16);
}
// Fan speed
if (bytes[0] == bytes[8]){ //same fan speed in two bytes
// note: fan speed 0-5 also in byte 14 bits [6:4] as 0-5
// speed 0-3 in bytes[0] and bytes[8] bits [5:4] 0-3, speed 4-5 set as 3.
switch (bytes[0] & 0x30) {
case 0x00:
Serial.println(F("FAN: AUTO"));
break;
case 0x10:
Serial.println(F("FAN: 1"));
break;
case 0x20:
Serial.println(F("FAN: 2"));
break;
case 0x30:
switch (bytes[14] & 0x70) {
case 0x30:
Serial.println(F("FAN: 3"));
break;
case 0x40:
Serial.println(F("FAN: 4"));
break;
case 0x50:
Serial.println(F("FAN: 5"));
break;
}
break;
}
}
// Sleep mode
// Note that YAC1FB has also Sleep 3-mode which sends 24 bytes and is not decoded here
switch (bytes[0] & 0x80) {
case 0x80:
Serial.println(F("SLEEP: ON 1"));
break;
case 0x00:
if ((bytes[12] & 0x01) == 1){
Serial.println(F("SLEEP: ON 2"));
} else {
Serial.println(F("SLEEP: OFF"));
}
break;
}
// Air direction swing
// in bytes[0] and bytes[8]
if (bytes[0] == bytes[8]){
switch (bytes[0] & 0x40) {
case 0x40:
Serial.println(F("SWING: ON"));
break;
case 0x00:
Serial.println(F("SWING: OFF"));
break;
}
}
// Vertical air direction
switch (bytes[4] & 0x0F){
case 0x00:
Serial.println(F("VERT. VANE STOP"));
break;
case 0x01:
Serial.println(F("VERT. VANE SWEEP UP-DOWN (1-5)"));
break;
case 0x02:
Serial.println(F("VERT. VANE UP (1)"));
break;
case 0x03:
Serial.println(F("VERT. VANE HIGH (2)"));
break;
case 0x04:
Serial.println(F("VERT. VANE CENTER (3)"));
break;
case 0x05:
Serial.println(F("VERT. VANE LOW (4)"));
break;
case 0x06:
Serial.println(F("VERT. VANE DOWN (5) "));
break;
case 0x07:
Serial.println(F("VERT. VANE SWEEP 3-5"));
break;
case 0x09:
Serial.println(F("VERT. VANE SWEEP 2-4"));
break;
case 0x0B:
Serial.println(F("VERT. VANE SWEEP 1-3"));
break;
}
// Horizontal air direction
switch (bytes[4] & 0xF0){
case 0x00:
Serial.println(F("HORIZ. VANE STOP"));
break;
case 0x10:
Serial.println(F("HORIZ. VANE SWEEP LEFT-RIGHT (1-5)"));
break;
case 0x20:
Serial.println(F("HORIZ. VANE FAR LEFT (1)"));
break;
case 0x30:
Serial.println(F("HORIZ. VANE LEFT (2)"));
break;
case 0x40:
Serial.println(F("HORIZ. VANE CENTER (3)"));
break;
case 0x50:
Serial.println(F("HORIZ. VANE RIGHT (4)"));
break;
case 0x60:
Serial.println(F("HORIZ. VANE FAR RIGHT (5)"));
break;
case 0xC0:
Serial.println(F("HORIZ. VANE LEFT (1) AND RIGHT (5)"));
break;
case 0xD0:
Serial.println(F("HORIZ. VANE SWEEP TO CENTER"));
break;
}
// Display temperature
// bytes[5] bit [0:1]
switch (bytes[5] & 0x3) {
case 0x00:
Serial.println(F("DISPLAY: SET TEMP"));
break;
case 0x01:
Serial.println(F("DISPLAY: SET TEMP"));
break;
case 0x02:
Serial.println(F("DISPLAY: INDOOR TEMP"));
break;
case 0x03:
Serial.println(F("DISPLAY: OUTDOOR TEMP"));
break;
}
switch (bytes[5] & 0x4) {
case 0x00:
Serial.println(F("I-FEEL: OFF"));
break;
case 0x04:
Serial.println(F("I-FEEL: ON"));
break;
}
if (pulseCount == 161) {
Serial.print(F("I-FEEL TEMPERATURE: "));
Serial.println(bytes[16]);
}
return true;
}
return false;
}