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- /*
- * Stepper DS18B20
- */
- #include <OneWire.h>
- // Constants
- const int redLed = 11;
- const int blueLed = 10;
- int DS18S20_Pin = 12; // DS18S20 on digital 12
- // Temperature chip i/o
- OneWire ds(DS18S20_Pin); // on digital pin 12
- // Variables
- float temperature = 25.0; //sensor updates this
- int substeps = 16;
- int stepperApinDir = 7;
- int stepperApinStep = 4;
- double stepperAcurrPosition = 0;
- double stepperAdestPosition = 0;
- double stepperAtimer = 0;
- int stepperAtoggle = 0;
- double stepperAspeed = 4800 / substeps; //higher is slower
- unsigned long interval = 5000; // the time we need to wait
- unsigned long previousMillis = 0; // millis() returns an unsigned long.
- void setup(void) {
- Serial.begin(9600);
- Serial.println("Initializing...");
- Serial.println(temperature);
- pinMode(redLed, OUTPUT);
- pinMode(blueLed, OUTPUT);
- //READY!
- delay(1000);
- }
- void loop(void) {
- temperature = getTemp();
- Serial.println(temperature);
- if (temperature < 23.0) {
- //Close vents.
- stepperAdestPosition = 100;
- digitalWrite(redLed, LOW);
- digitalWrite(blueLed, HIGH);
- Serial.println("CHECKPOINT 001");
- }
- if (temperature > 24.0) {
- //Open vents.
- stepperAdestPosition = 200; //calibrate these!
- digitalWrite(redLed, HIGH);
- digitalWrite(blueLed, LOW);
- Serial.println("CHECKPOINT 002");
- }
- while ((stepperAdistanceToGo() != 0) ) {
- stepperArun();
- }
- delay(1000);
- }
- // THESE CONTROL THE STEPPER MOTORS
- double stepperAdistanceToGo() {
- return abs(stepperAdestPosition - stepperAcurrPosition);
- }
- void stepperArun() {
- double dir = 0;
- if (stepperAdistanceToGo() >= 1) {
- //SET DIRECTION
- if (stepperAdestPosition > stepperAcurrPosition) {
- digitalWrite(stepperApinDir, 1);
- dir = 1;
- } else {
- digitalWrite(stepperApinDir, 0);
- dir = -1;
- }
- if (micros() < (stepperAtimer - stepperAspeed)) {
- //rollover bug... fix
- stepperAtimer = micros();
- }
- //PULSE AT SPEED LIMIT
- if (micros() >= (stepperAtimer + stepperAspeed)) {
- digitalWrite(stepperApinStep, stepperAtoggle);
- stepperAtimer = micros();
- stepperAtoggle = !stepperAtoggle;
- stepperAcurrPosition += dir;
- }
- }
- Serial.println("STEPPER RUN COMPLETE");
- }
- float getTemp() {
- //DS18S20 temp in DEG Celsius
- byte data[12];
- byte addr[8];
- if ( !ds.search(addr)) {
- // no more sensors on chain, reset search
- ds.reset_search();
- return -1000;
- }
- if ( OneWire::crc8( addr, 7) != addr[7]) {
- Serial.println("CRC is not valid!");
- return -1000;
- }
- if ( addr[0] != 0x10 && addr[0] != 0x28) {
- Serial.print("Device is not recognized");
- return -1000;
- }
- ds.reset();
- ds.select(addr);
- ds.write(0x44, 1); // start conversion, with parasite power on at the end
- byte present = ds.reset();
- ds.select(addr);
- ds.write(0xBE); // Read Scratchpad
- for (int i = 0; i < 9; i++) { // we need 9 bytes
- data[i] = ds.read();
- }
- ds.reset_search();
- byte MSB = data[1];
- byte LSB = data[0];
- float tempRead = ((MSB << 8) | LSB); // using two's compliment
- float TemperatureSum = tempRead / 16;
- return TemperatureSum;
- }
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