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IRACsender.ino
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IRACsender.ino
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/*
* IR AC Sender - send IR signals to A/C unit
* An IR LED must be connected to Arduino PWM pin 3.
* Version 1.0 September 2013
* Copyright 2013 Itamar Ostricher
* http://itamaro.com
*/
#include <avr/pgmspace.h>
#include <IRremote.h>
IRsend irsend;
enum States{
Ready,
ReadPower,
ReadMode,
ReadFan,
ReadTempFirstDigit,
ReadTempSecondDigit,
Send,
Error,
} state;
enum PowerCommand{
Toggle,
Leave,
NoPower
} pwr;
enum ModeCommand{
Cool,
Heat,
Fan,
Dry,
NoMode
} mode;
enum FanCommand{
Auto,
Low,
Medium,
High,
NoFan
} fan;
int temp;
void resetState() {
pwr=NoPower;
mode=NoMode;
fan=NoFan;
temp = -1;
state = Ready;
}
unsigned int uSendBuff[RAWBUF];
// Raw IR buffers pre-configured with A/C commands (see ac_ir_analysis.py Python script)
// stored in Flash! (it's too much for to 2KB of SRAM we have..)
PROGMEM prog_uint16_t uSendBuff_Toggle_Cool_Auto_25[] = {181, 3000, 3700, 2050, 900, 1050, 1850, 1050, 850, 1100, 850, 2050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 1850, 1950, 1850, 2050, 850, 1050, 850, 1050, 900, 1050, 900, 1050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 900, 1050, 850, 1050, 900, 1050, 850, 1050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 900, 1050, 1750, 2050, 800, 3000, 3750, 2050, 900, 1050, 1800, 1050, 850, 1100, 800, 2050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 1800, 2000, 1850, 2050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 900, 1050, 800, 1050, 900, 1050, 900, 1050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 900, 1050, 800, 1050, 900, 1050, 900, 1050, 850, 1050, 1750, 2050, 850, 3000, 3750, 2050, 900, 1050, 1850, 1050, 850, 1100, 800, 2050, 900, 1050, 800, 1050, 900, 1050, 900, 1050, 1800, 2000, 1800, 2050, 900, 1050, 800, 1050, 900, 1050, 900, 1050, 900, 1050, 850, 1050, 900, 1050, 850, 1050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 900, 1050, 850, 1050, 900, 1050, 900, 1050, 900, 1050, 1750, 2050, 850, 3950};
PROGMEM prog_uint16_t uSendBuff_Leave_Cool_Auto_25[] = {187, 2950, 2850, 1000, 950, 1050, 900, 1050, 1850, 1000, 850, 1100, 850, 2000, 950, 1050, 850, 1000, 950, 1000, 950, 1050, 1850, 1950, 1850, 2000, 950, 1000, 850, 1000, 950, 1000, 950, 1050, 900, 1050, 850, 1000, 950, 1050, 900, 1000, 950, 1000, 850, 1050, 900, 1000, 950, 1000, 950, 1050, 850, 1000, 950, 1050, 900, 1050, 950, 1000, 1800, 2000, 900, 3000, 2850, 1000, 950, 1050, 900, 1000, 1900, 1050, 850, 1050, 900, 2000, 950, 1050, 850, 1000, 950, 1050, 900, 1000, 1900, 2000, 1850, 2000, 950, 1050, 850, 1000, 950, 1050, 950, 1050, 900, 1000, 900, 1050, 900, 1000, 950, 1000, 950, 1050, 850, 1000, 950, 1000, 950, 1050, 900, 1000, 900, 1050, 950, 1050, 900, 1000, 950, 1000, 1800, 2000, 900, 3000, 2850, 1050, 900, 1000, 950, 1000, 1850, 1050, 900, 1050, 900, 2050, 900, 1000, 900, 1050, 900, 1050, 950, 1000, 1900, 1950, 1900, 2050, 900, 1050, 900, 1000, 950, 1050, 900, 1000, 950, 1000, 850, 1050, 950, 1000, 950, 1000, 950, 1050, 850, 1000, 950, 1050, 900, 1050, 950, 1000, 900, 1050, 900, 1000, 950, 1000, 950, 1050, 1800, 2000, 850, 3900};
PROGMEM prog_uint16_t uSendBuff_Toggle_Cool_Auto_24[] = {181, 3000, 3750, 2000, 900, 1050, 1850, 1000, 850, 1100, 850, 2000, 900, 1000, 850, 1000, 900, 1000, 900, 1050, 1850, 1950, 900, 1050, 1850, 2000, 850, 1050, 900, 1000, 900, 1000, 900, 1050, 850, 1000, 900, 1050, 900, 1000, 950, 1000, 850, 1050, 900, 1000, 900, 1000, 900, 1050, 850, 1000, 900, 1000, 900, 1050, 900, 1000, 1800, 2000, 850, 3000, 3750, 2050, 900, 1000, 1850, 1000, 850, 1100, 850, 2000, 900, 1050, 850, 1000, 900, 1000, 900, 1050, 1850, 1950, 900, 1000, 1850, 2000, 850, 1000, 900, 1000, 900, 1050, 900, 1000, 850, 1000, 900, 1000, 950, 1000, 900, 1000, 850, 1000, 900, 1000, 900, 1000, 900, 1000, 850, 1000, 900, 1050, 900, 1000, 950, 1000, 1800, 2000, 850, 2950, 3750, 2000, 950, 1000, 1850, 1000, 900, 1050, 850, 2000, 900, 1000, 850, 1000, 950, 1000, 950, 1000, 1850, 1950, 950, 1000, 1850, 2000, 900, 1000, 950, 1000, 900, 1000, 950, 1000, 850, 1000, 950, 1000, 950, 1000, 900, 1050, 850, 1000, 900, 1000, 900, 1000, 950, 1000, 850, 1050, 900, 1000, 900, 1000, 900, 1000, 1800, 2000, 850, 3900};
prog_uint16_t * getAcSendBuff() {
if ( (Toggle == pwr) && (Cool == mode) &&(Auto == fan) && (25 == temp) ) { return uSendBuff_Toggle_Cool_Auto_25; }
if ( (Leave == pwr) && (Cool == mode) &&(Auto == fan) && (25 == temp) ) { return uSendBuff_Leave_Cool_Auto_25; }
if ( (Toggle == pwr) && (Cool == mode) &&(Auto == fan) && (24 == temp) ) { return uSendBuff_Toggle_Cool_Auto_24; }
return 0;
}
int sendAcCommand() {
uint16_t rawlen;
if ( (NoPower == pwr) || (NoMode == mode) || (NoFan == fan) || (-1 == temp) ) {
Serial.println(F("Error in send A/C command - not all parameters set"));
return 0;
}
// valid state - send it
Serial.print(F("Sending A/C command with following parameters: Power="));
Serial.print(pwr, DEC);
Serial.print(F(", Mode="));
Serial.print(mode, DEC);
Serial.print(F(", Fan="));
Serial.print(fan, DEC);
Serial.print(F(", Temperature="));
Serial.println(temp, DEC);
prog_uint16_t * pfSendBuff = getAcSendBuff();
if (0 != pfSendBuff) {
rawlen = pgm_read_word_near(pfSendBuff);
memcpy_P(uSendBuff, pfSendBuff+1, rawlen * sizeof(uint16_t));
irsend.sendRaw(uSendBuff, rawlen, 38);
Serial.println("Success");
} else {
Serial.println("Unsupported Command");
}
return 1;
}
void setup() {
Serial.begin(9600);
Serial.println("Arduino A/C-Control v1.0 - Ready");
resetState();
}
void loop() {
char incoming;
int val;
// Valid A/C commands:
// - P# - set power toggle value
// - M# - set mode value
// - F# - set fan value
// - T## - set temperature value
// - S - send A/C command
// where "#" is a ASCII digit (according to enum, or specifying temperature as 2-digit number)
while (Serial.available()) {
incoming = Serial.read();
switch (state) {
case Ready:
switch (incoming) {
case 'P':
state = ReadPower;
break;
case 'M':
state = ReadMode;
break;
case 'F':
state = ReadFan;
break;
case 'T':
state = ReadTempFirstDigit;
break;
case 'S':
if (0 != sendAcCommand()) {
state = Ready;
} else {
state = Error;
}
break;
}
break;
case ReadPower:
val = (int)incoming - (int)'0';
if ( (val >= 0) && (val < (int)NoPower) ) {
pwr = (PowerCommand)val;
Serial.print(F("Power parameter set to "));
Serial.println(pwr, DEC);
state = Ready;
} else {
Serial.println(F("Invalid power value to"));
state = Error;
}
break;
case ReadMode:
val = (int)incoming - (int)'0';
if ( (val >= 0) && (val < (int)NoMode) ) {
mode = (ModeCommand)val;
Serial.print(F("Mode parameter set to "));
Serial.println(mode, DEC);
state = Ready;
} else {
Serial.println(F("Invalid mode value"));
state = Error;
}
break;
case ReadFan:
val = (int)incoming - (int)'0';
if ( (val >= 0) && (val < (int)NoFan) ) {
fan = (FanCommand)val;
Serial.print(F("Fan parameter set to "));
Serial.println(fan, DEC);
state = Ready;
} else {
Serial.println(F("Invalid fan value"));
state = Error;
}
break;
case ReadTempFirstDigit:
val = (int)incoming - (int)'0';
if ( (val >= 0) && (val <= 9) ) {
temp = 10 * val;
state = ReadTempSecondDigit;
} else {
Serial.println(F("Invalid temperature digit"));
state = Error;
}
break;
case ReadTempSecondDigit:
val = (int)incoming - (int)'0';
if ( (val >= 0) && (val <= 9) ) {
temp += val;
Serial.print(F("Temperature parameter set to "));
Serial.println(temp, DEC);
state = Ready;
} else {
Serial.println(F("Invalid temperature digit"));
state = Error;
}
break;
}
}
if (Error == state) {
// clear all pending serial inputs and return to Ready state
// (keep parameters that were set before)
while (Serial.available()) {
Serial.read();
}
state = Ready;
}
}