hwhardsoftoverview port function:
Code for Arduino Nano
/*
* HVAC car control with Arduino
* Version 1.0
* Copyright (C) 2018 Hartmut Wendt www.hwhardsoft.de
*
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#include <OneWire.h>
#include <TimerOne.h>
// Portkonfiguration
#define REL_VENT_FRONT 5 //relay output for ventilation front
#define REL_VENT_FOOT 6 //relay output for ventilation footwell area
#define REL_VENT_WINDOW 7 //relay output for ventilation window
#define REL_FAN_PWR 8 //relay output for fan power
#define PWM_FAN_PIN 9 //PWM output for fan power
#define REL_COMPRESSOR 11 //relay output for AC compressorr
#define REL_HEATING 12 //relay output for heating valve
#define REL_AIR_CIRCULATION 13 //relay output for air circulation
#define REL_FOG_LIGHT 14 //relay output for fog light
#define REL_HEATING_WINDOW_FRONT 15 //relay output for window heating front
#define REL_HEATING_WINDOW_REAR 16 //relay output for window heating rear
#define TEST_PIN 19 // output for sw tests
// OneWire DS18S20, DS18B20, DS1822 Temperature sensor
OneWire sens_out(2); // outside temperature sensor on D2
OneWire sens_in_right(3); // inside right side temperature sensor on D3
OneWire sens_in_left(4); // inside left side temperature sensor on D4
int temp_out = 20; // measured outside temperature
int temp_in_right = 20; // measured inside right side temperature
int temp_in_left = 20; // measured inside left side temperature
int set_in_right = 20; // setted inside right side temperature
int set_in_left = 20; // setted inside left side temperature
// Variables
int i1;
char *test;
String s1;
String inputString;
boolean AC_ENABLED = false;
int bscheduler = 0;
/** Wird beim Start einmal ausgeführt */
void setup()
{
// set port direction
pinMode(REL_VENT_FRONT, OUTPUT);
pinMode(REL_VENT_FOOT, OUTPUT);
pinMode(REL_VENT_WINDOW, OUTPUT);
pinMode(REL_FAN_PWR, OUTPUT);
pinMode(REL_COMPRESSOR, OUTPUT);
pinMode(REL_HEATING, OUTPUT);
pinMode(REL_AIR_CIRCULATION, OUTPUT);
pinMode(REL_FOG_LIGHT, OUTPUT);
pinMode(REL_HEATING_WINDOW_FRONT, OUTPUT);
pinMode(REL_HEATING_WINDOW_REAR, OUTPUT);
pinMode(TEST_PIN, OUTPUT);
// init serial port for nextion communication.
Serial.begin(9600);
delay(250);
// first read in of temperatures
temp_out = read_temperature(sens_out);
delay(100);
temp_in_right = read_temperature(sens_in_right);
delay(100);
temp_in_left = read_temperature(sens_in_left);
//pwm init
Timer1.initialize(1000); // 1.000 us = 1 kHz
Timer1.pwm (PWM_FAN_PIN, 0);
}
// ----- Main loop -----------------------------------------------------------------------------------
void loop()
{
// processing of incomming messages from nextion
Nextion_processing();
switch(bscheduler)
{
// measure outside temperature
case 0:
temp_out = read_temperature(sens_out);
// transmit outside temperature to nextion display
Serial.print("ID1.val=");
Serial.print(temp_out);
Serial.write(0xff);
Serial.write(0xff);
Serial.write(0xff);
break;
// measure inside right temperature
case 25:
temp_in_right = read_temperature(sens_in_right);
break;
// measure inside left temperature
case 50:
temp_in_left = read_temperature(sens_in_left);
break;
// HVAC control
case 75:
clima_control();
break;
}
bscheduler++;
if (bscheduler > 100) bscheduler = 0;
delay(10);
}
// read temperature from a connected 1wire temperature sensor
int read_temperature(OneWire ds) {
byte i;
byte present = 0;
byte type_s;
byte data[12];
byte addr[8];
if ( !ds.search(addr))
{
ds.reset_search();
delay(250);
return(97);
}
if (OneWire::crc8(addr, 7) != addr[7])
{
return(98);
}
// the first ROM byte indicates which chip
switch (addr[0])
{
case 0x10:
type_s = 1;
break;
case 0x28:
type_s = 0;
break;
case 0x22:
type_s = 0;
break;
default:
return(99);
}
ds.reset();
ds.select(addr);
ds.write(0x44, 1); // start conversion, with parasite power on at the end
delay(750);
present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for ( i = 0; i < 9; i++)
{
data[i] = ds.read();
}
// Convert the data to actual temperature
int16_t raw = (data[1] << 8) | data[0];
if (type_s) {
raw = raw << 3; // 9 bit resolution default
if (data[7] == 0x10)
{
digitalWrite(TEST_PIN, HIGH);
raw = (raw & 0xFFF0) + 12 - data[6];
}
}
else
{
byte cfg = (data[4] & 0x60);
if (cfg == 0x00) raw = raw & ~7; // 9 bit resolution, 93.75 ms
else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
}
return((int)raw / 16.0);
}
unsigned long StrToHex(String str, byte digits)
{
char ConvByte[10];
str.toCharArray(ConvByte, digits);
return (unsigned long) strtol(ConvByte, NULL, 16);
}
// ------ receiving and processing of incomming data from nextion
void Nextion_processing()
{
int i1;
String s1;
while (Serial.available()) {
// get the new byte:
char inChar = (char)Serial.read();
// add it to the inputString:
inputString += inChar;
if (inChar != '|') return;
}
int i2=inputString.indexOf("=");
if (i2 > 0) {
#ifdef _debug_snd
Serial.print("Nextion: ");
Serial.print(inputString);
Serial.println(" - ");
Serial.print(inputString.substring(i2-2,i2));
Serial.print("=");
Serial.println(inputString[i2+1]);
#endif
//- id2 FOG LIGHT -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id02=1")> -1) {
// FOG LIGHT on
digitalWrite(REL_FOG_LIGHT, HIGH);
}
else if(inputString.indexOf("id02=0")> -1) {
// FOG LIGHT off
digitalWrite(REL_FOG_LIGHT, LOW);
}
//- id5 ventilation footwell + window -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id05=1")> -1) {
// set ventilation to foot well & window
digitalWrite(REL_VENT_FRONT, LOW);
digitalWrite(REL_VENT_FOOT, HIGH);
digitalWrite(REL_VENT_WINDOW, HIGH);
}
else if(inputString.indexOf("id05=0")> -1) {
// switch all ventilation off
digitalWrite(REL_VENT_FRONT, LOW);
digitalWrite(REL_VENT_FOOT, LOW);
digitalWrite(REL_VENT_WINDOW, LOW);
}
//- id9 ventilation footwell -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id09=1")> -1) {
// set ventilation to foot well
digitalWrite(REL_VENT_FRONT, LOW);
digitalWrite(REL_VENT_FOOT, HIGH);
digitalWrite(REL_VENT_WINDOW, LOW);
}
else if(inputString.indexOf("id09=0")> -1) {
// switch all ventilation off
digitalWrite(REL_VENT_FRONT, LOW);
digitalWrite(REL_VENT_FOOT, LOW);
digitalWrite(REL_VENT_WINDOW, LOW);
}
//- id14 ventilation front -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id14=1")> -1) {
// set ventilation to front
digitalWrite(REL_VENT_FRONT, HIGH);
digitalWrite(REL_VENT_FOOT, LOW);
digitalWrite(REL_VENT_WINDOW, LOW);
}
else if(inputString.indexOf("id14=0")> -1) {
// switch all ventilation off
digitalWrite(REL_VENT_FRONT, LOW);
digitalWrite(REL_VENT_FOOT, LOW);
digitalWrite(REL_VENT_WINDOW, LOW);
}
//- id22 ventilation front + footwell -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id22=1")> -1) {
// set ventilation to front + foot well
digitalWrite(REL_VENT_FRONT, HIGH);
digitalWrite(REL_VENT_FOOT, HIGH);
digitalWrite(REL_VENT_WINDOW, LOW);
}
else if(inputString.indexOf("id22=0")> -1) {
// switch all ventilation off
digitalWrite(REL_VENT_FRONT, LOW);
digitalWrite(REL_VENT_FOOT, LOW);
digitalWrite(REL_VENT_WINDOW, LOW);
}
//- id4 electrical window heating rear -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id04=1")> -1) {
// window heating on
digitalWrite(REL_HEATING_WINDOW_REAR, HIGH);
}
else if(inputString.indexOf("id04=0")> -1) {
// window heating off
digitalWrite(REL_HEATING_WINDOW_REAR, LOW);
}
//- id6 electrical window heating front -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id06=1")> -1) {
// window heating on
digitalWrite(REL_HEATING_WINDOW_FRONT, HIGH);
}
else if(inputString.indexOf("id06=0")> -1) {
// window heating off
digitalWrite(REL_HEATING_WINDOW_FRONT, LOW);
}
//- id7 air circulation -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id07=1")> -1) {
// air circulation on
digitalWrite(REL_AIR_CIRCULATION, HIGH);
}
else if(inputString.indexOf("id07=0")> -1) {
//air circulation off
digitalWrite(REL_AIR_CIRCULATION, LOW);
}
//- id10 Air Condition enabled/disabled -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id10=1")> -1) {
// AC enabled
AC_ENABLED = true;
}
else if(inputString.indexOf("id10=0")> -1) {
// AC disabled
AC_ENABLED = false;
}
//- id18 HVAC on/off -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id18=1")> -1) {
// HVAC on
}
else if(inputString.indexOf("id18=0")> -1) {
// HVAC off
AC_ENABLED = false;
// FAN off
digitalWrite(REL_FAN_PWR, LOW);
Timer1.pwm (PWM_FAN_PIN, 0);
//air circulation off
digitalWrite(REL_AIR_CIRCULATION, LOW);
// window heating off
digitalWrite(REL_HEATING_WINDOW_REAR, LOW);
digitalWrite(REL_HEATING_WINDOW_FRONT, LOW);
// switch all ventilation off
digitalWrite(REL_VENT_FRONT, LOW);
digitalWrite(REL_VENT_FOOT, LOW);
digitalWrite(REL_VENT_WINDOW, LOW);
}
//- id13 FAN control -
//------------------------------------------------------------------------------------------------
if (inputString.indexOf("id13=0")> -1) {
// FAN off
digitalWrite(REL_FAN_PWR, LOW);
Timer1.pwm (PWM_FAN_PIN, 0);
}
else if(inputString.indexOf("id13=1")> -1) {
// FAN level 1
digitalWrite(REL_FAN_PWR, HIGH);
Timer1.pwm (PWM_FAN_PIN, 146);
}
else if(inputString.indexOf("id13=2")> -1) {
// FAN level 2
digitalWrite(REL_FAN_PWR, HIGH);
Timer1.pwm (PWM_FAN_PIN, 293);
}
else if(inputString.indexOf("id13=3")> -1) {
// FAN level 3
digitalWrite(REL_FAN_PWR, HIGH);
Timer1.pwm (PWM_FAN_PIN, 439);
}
else if(inputString.indexOf("id13=4")> -1) {
// FAN level 4
digitalWrite(REL_FAN_PWR, HIGH);
Timer1.pwm (PWM_FAN_PIN, 585);
}
else if(inputString.indexOf("id13=5")> -1) {
// FAN level 5
digitalWrite(REL_FAN_PWR, HIGH);
Timer1.pwm (PWM_FAN_PIN, 731);
}
else if(inputString.indexOf("id13=6")> -1) {
// FAN level 6
digitalWrite(REL_FAN_PWR, HIGH);
Timer1.pwm (PWM_FAN_PIN, 877);
}
else if(inputString.indexOf("id13=7")> -1) {
// FAN level Max
digitalWrite(REL_FAN_PWR, HIGH);
Timer1.pwm (PWM_FAN_PIN, 1023);
}
//-- setted temperature right --
//------------------------------------------------------------------------------------------------
i1 = inputString.indexOf("id20=");
if (i1 > -1)
{
set_in_right = inputString.charAt(i1 + 5) - 48;
}
//-- setted temperature left --
//------------------------------------------------------------------------------------------------
i1 = inputString.indexOf("id16=");
if (i1 > -1)
{
set_in_left = inputString.charAt(i1 + 5) - 48;
}
}
while(Serial.available()) {Serial.read();}
inputString = "";
}
// HVAC control
void clima_control() {
// cooling or heating requiredn?
if (temp_out < set_in_left) {
// heating
digitalWrite(REL_COMPRESSOR, LOW);
digitalWrite(REL_HEATING, HIGH);
} else if ((temp_out > (set_in_left + 1)) && (temp_out > 15) && (AC_ENABLED == true)) {
// cooling
digitalWrite(REL_COMPRESSOR, HIGH);
digitalWrite(REL_HEATING, LOW);
} else {
// temperature ok - no further action required
digitalWrite(REL_COMPRESSOR, LOW);
digitalWrite(REL_HEATING, LOW);
}
}