1 | #include <OneWire.h>
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2 | #include <DallasTemperature.h>
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3 |
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4 | OneWire ds(2);
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5 |
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6 | // Device Adressen der einzelnen Temperatursensoren angeben
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7 | DeviceAddress sensor1 = { 0x10, 0x38, 0x27, 0x57, 0x2, 0x8, 0x0, 0x79 };
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8 | DeviceAddress sensor2 = { 0x10, 0x16, 0x2E, 0x57, 0x2, 0x8, 0x0, 0x2F };
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9 | //DeviceAddress sensor3 = { 0x10, 0x11, 0x40, 0xC0, 0x1, 0x8, 0x0, 0x9A };
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10 | //DeviceAddress sensor4 = { 0x10, 0x77, 0x38, 0x57, 0x2, 0x8, 0x0, 0x3B };
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11 |
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12 | char sensor1Name[] = "Sensor1: ";
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13 | char sensor2Name[] = "Sensor2: ";
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14 | //char sensor3Name[] = "Sensor3: ";
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15 | //char sensor4Name[] = "Sensor4: ";
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16 |
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17 | int BlinkRate=0; // Anzahl Blinken für Tests
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18 | String Input=""; // Input von Serieller Schnittstelle
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19 | String Befehl="NOP"; // Befehl aus Input
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20 | int Parameter=0; // Parameter aus Input
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21 | int Wert=0; // Rückgabewert Analog
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22 |
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23 | char buffer[20] = ""; // Speicherbereich für Datenkonvertierung
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24 |
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25 |
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26 | void setup()
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27 | {
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28 | Serial.begin(9600);
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29 | }
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30 |
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31 |
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32 | void loop(void)
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33 | {
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34 | if (Serial.available()) Einlesen();
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35 | //Serial.println("Testausgabe");
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36 | //delay(2000);
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37 | }
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38 |
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39 | void Einlesen()
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40 | {
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41 | while (Serial.available())
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42 | {
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43 | char ch = Serial.read();
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44 | //Serial.print("Echo: ");
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45 | //Serial.println(ch);
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46 | Input=Input+ch;
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47 | //Serial.println(Input);
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48 | delay(10);
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49 | }
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50 | Befehl = Input.substring(0, 4);
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51 | //Serial.println("Befehl: " + Befehl);
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52 | Parameter = (Input.substring(4, 6)).toInt();
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53 | //Serial.print("Parameter: ");
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54 | //Serial.println(Parameter,DEC);
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55 | ausfuehren();
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56 | //Serial.println(Befehl + Parameter + " = " + Wert);
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57 |
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58 | Input="";
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59 | }
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60 |
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61 | void ausfuehren()
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62 | {
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63 |
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64 | if (Befehl=="OW01")
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65 | {
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66 | float temp1 = getTemperature(sensor1);
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67 | Serial.println(temp1);
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68 | }
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69 | if (Befehl=="OW02")
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70 | {
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71 | float temp2 = getTemperature(sensor2);
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72 | Serial.println(temp2);
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73 | }
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74 | else
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75 | {
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76 | Serial.println("ERROR");
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77 | }
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78 | }
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79 |
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80 | void writeTimeToScratchpad(byte* address)
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81 | {
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82 | //reset the bus
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83 | ds.reset();
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84 | //select our sensor
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85 | ds.select(address);
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86 | //CONVERT T function call (44h) which puts the temperature into the scratchpad
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87 | ds.write(0x44,1);
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88 | //sleep a second for the write to take place
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89 | delay(1000);
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90 | }
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91 |
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92 | void readTimeFromScratchpad(byte* address, byte* data)
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93 | {
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94 | //reset the bus
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95 | ds.reset();
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96 | //select our sensor
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97 | ds.select(address);
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98 | //read the scratchpad (BEh)
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99 | ds.write(0xBE);
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100 | for (byte i=0;i<9;i++){
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101 | data[i] = ds.read();
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102 | }
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103 | }
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104 |
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105 | float getTemperature(byte* address)
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106 | {
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107 | int tr;
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108 | byte data[12];
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109 |
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110 | writeTimeToScratchpad(address);
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111 |
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112 | readTimeFromScratchpad(address,data);
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113 |
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114 | //put in temp all the 8 bits of LSB (least significant byte)
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115 | tr = data[0];
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116 |
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117 | //check for negative temperature
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118 | if (data[1] > 0x80)
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119 | {
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120 | tr = !tr + 1; //two's complement adjustment
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121 | tr = tr * -1; //flip value negative.
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122 | }
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123 |
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124 | //COUNT PER Celsius degree (10h)
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125 | int cpc = data[7];
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126 | //COUNT REMAIN (0Ch)
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127 | int cr = data[6];
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128 |
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129 | //drop bit 0
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130 | tr = tr >> 1;
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131 |
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132 | return tr - (float)0.25 + (cpc - cr)/(float)cpc;
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133 | }
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