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- // CODE TESTED ON ARDUINO 1.6.7 IDE
- // HEAVY MODIFIED BY SECURITYXIII TO GET 8 THERMISTORS
- // OneWire DS18S20, DS18B20, DS1822 Temperature Example
- // http://www.pjrc.com/teensy/td_libs_OneWire.html
- // The DallasTemperature library can do all this work for you!
- // http://milesburton.com/Dallas_Temperature_Control_Library
- #include <OneWire.h>
- OneWire ds(10); // on pin 10 (a 4.7K resistor is necessary)
- // KNOWN ROMs (IDs of Thermistors) //
- const char* therm1 = "28ff988b8141cd";
- const char* therm2 = "28ffac6d68142bc";
- const char* therm3 = "28ffe6746814243";
- const char* therm4 = "28ffd96f681424";
- const char* therm5 = "28ff734b814175";
- const char* therm6 = "28ff7bb66814378";
- const char* therm7 = "28ff8758691438";
- const char* therm8 = "28ff57bb81418";
- const char* therms[] = {therm1, therm2, therm3, therm4, therm5, therm6, therm7, therm8};
- char rel1; char rel2; char rel3; char rel4; char rel5; char rel6; char rel7; char rel8;
- char rels[] = {rel1, rel2, rel3, rel4, rel5, rel6, rel7, rel8};
- int o; int z;
- // RELAY LOGIC
- char on = LOW; char off = HIGH;
- // TEMP
- int celmax = 40.00;
- void setup() {
- char x = OUTPUT;
- for (z = 2; z < 10; z++) {
- pinMode(z, x);
- }
- Serial.begin(9600);
- }
- void loop() {
- ///////// DO NOT TOUCH - THIS CODE IS WORKING WITH TEMP ! /////////
- byte i;
- byte present = 0;
- byte type_s;
- byte data[12];
- byte addr[8];
- float celsius;
- String aa;
- String ab;
- String xx;
- String check;
- if ( !ds.search(addr)) {
- Serial.println("No more addresses.");
- Serial.println();
- ds.reset_search();
- delay(0);
- return;
- }
- if (OneWire::crc8(addr, 7) != addr[7]) {
- Serial.println("CRC is not valid!");
- return;
- }
- // Serial.println();
- // the first ROM byte indicates which chip
- switch (addr[0]) {
- case 0x10:
- aa = "Chip = DS18S20,"; // or old DS1820
- type_s = 1;
- break;
- case 0x28:
- aa = "Chip = DS18B20,";
- type_s = 0;
- break;
- case 0x22:
- aa = "Chip = DS1822,";
- type_s = 0;
- break;
- default:
- aa = "Device is not a DS18x20 family device.";
- return;
- }
- ds.reset();
- ds.select(addr);
- ds.write(0x44, 1); // start conversion, with parasite power on at the end
- // delay(750); // maybe 750ms is enough, maybe not
- // we might do a ds.depower() here, but the reset will take care of it.
- aa += " Data = ";
- present = ds.reset();
- ds.select(addr);
- ds.write(0xBE); // Read Scratchpad
- aa += String(present, HEX);
- //Serial.print(" ");
- for ( i = 0; i < 9; i++) { // we need 9 bytes
- data[i] = ds.read();
- aa += String(data[i], HEX);
- // Serial.print(" ");
- }
- aa += ", CRC = ";
- aa += String(OneWire::crc8(data, 8), HEX);
- //Serial.print
- // Serial.println();
- // Convert the data to actual temperature
- // because the result is a 16 bit signed integer, it should
- // be stored to an "int16_t" type, which is always 16 bits
- // even when compiled on a 32 bit processor.
- int16_t raw = (data[1] << 8) | data[0];
- if (type_s) {
- raw = raw << 3; // 9 bit resolution default
- if (data[7] == 0x10) {
- // "count remain" gives full 12 bit resolution
- raw = (raw & 0xFFF0) + 12 - data[6];
- }
- } else {
- byte cfg = (data[4] & 0x60);
- // at lower res, the low bits are undefined, so let's zero them
- 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
- //// default is 12 bit resolution, 750 ms conversion time
- }
- celsius = (float)raw / 16.0;
- aa += (", Temperature = ");
- aa += (celsius);
- aa += (" celsius, ");
- delay(0);
- aa += "ROM = ";
- for( i = 0; i < 8; i++) {
- //Serial.write(' '); // <- this can be used to add spaces
- check += String(addr[i], HEX);
- }
- ///////// IT'S MOSTLY SAFE TO TOUCH FROM HERE /////////
- // Checking that temp is higher than celmax
- for (o = 0; o < 8; o++) {
- if (check == therms[o]) { if (celsius >= celmax) { rels[o] = on; } else { rels[o] = off; } }
- digitalWrite(o+2, rels[o]);
- }
- aa += check;
- Serial.print(aa);
- Serial.println();
- }
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