1 | #include <Wire.h>
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2 | #include <LiquidCrystal_I2C.h>
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3 | int wert1;
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4 | float wert2;
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5 | const int windpin=3;
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6 |
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7 | const int measureTime=3;
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8 |
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9 | volatile unsigned int windCounter = 0;
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10 | float windSpeed = 0.0;
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11 | unsigned long time = 0;
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12 |
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13 | const int hallPin=2;
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14 | const unsigned long sampleTime=1000;
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15 | const int maxRPM = 10200;
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16 |
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17 |
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18 | LiquidCrystal_I2C lcd(0x27,20,4); // set the LCD address to 0x27 for a 16 chars and 2 line display
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19 |
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20 |
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21 |
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22 | void countWind() {
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23 |
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24 | windCounter ++;
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25 |
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26 | }
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27 |
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28 | void show_values() {
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29 |
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30 |
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31 |
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32 |
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33 | lcd.setCursor(0,1);
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34 |
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35 | lcd.print("Wind:");
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36 |
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37 | lcd.print(windSpeed);
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38 | lcd.setCursor(16,1);
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39 | lcd.print("km/h");
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40 |
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41 |
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42 |
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43 | }
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44 |
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45 |
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46 | void setup()
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47 | {
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48 | lcd.init(); // initialize the lcd
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49 | lcd.init();
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50 | // Print a message to the LCD.
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51 | lcd.backlight();
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52 | pinMode(hallPin,INPUT);
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53 | Serial.begin(9600);
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54 | time = millis();
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55 |
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56 |
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57 | }
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58 |
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59 |
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60 | void loop()
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61 | {
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62 | delay(100);
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63 | int rpm=getRPM();
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64 |
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65 | displayRPM(rpm);
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66 |
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67 | Spannungssensor();
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68 | Windsensor();
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69 | Stromsensor();
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70 | }
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71 |
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72 | void Stromsensor()
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73 |
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74 | {
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75 |
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76 | float average = 0;
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77 | for(int i = 0; i < 1000; i++)
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78 | {
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79 | average = average + (0.048875855327468 * analogRead(A0) -25) / 1000;
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80 |
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81 |
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82 | }
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83 | lcd.setCursor(0,2);
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84 | lcd.print("Strom:");
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85 | lcd.print(average);
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86 | lcd.setCursor(16,2);
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87 | lcd.print("A");
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88 |
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89 | }
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90 |
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91 |
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92 | void Spannungssensor()
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93 | {
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94 | float temp;
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95 | wert1=analogRead(A1); //Spannungswert am analogen Eingang 1 auslesen
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96 | temp=wert1/4.092; //Wert mathematisch umwandeln um den Spannungswert in Volt zu erhalten
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97 | wert1=(int)temp;
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98 | wert2=((wert1%100)/10.0);
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99 |
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100 |
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101 | lcd.setCursor(0,0);
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102 | lcd.print("Spannung:");
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103 | lcd.print(wert2);
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104 | lcd.setCursor(16,0);
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105 | lcd.print("V");
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106 |
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107 | }
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108 |
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109 | void Windsensor()
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110 | {
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111 |
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112 |
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113 |
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114 | windCounter = 0;
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115 |
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116 | time = millis();
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117 |
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118 | //zaehl-interrupt aktivieren
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119 |
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120 | attachInterrupt(1,countWind,RISING);
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121 |
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122 | //abwarten des messzeitraums
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123 |
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124 | delay(1000 * measureTime);
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125 |
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126 | //zaehl-interrupt deaktivieren
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127 |
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128 | detachInterrupt(1);
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129 |
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130 | //zeit bestimmen
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131 |
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132 | time = (millis() - time) / 1000;
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133 |
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134 |
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135 | windSpeed = (float)windCounter / (float)measureTime * 2,4;
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136 |
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137 |
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138 |
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139 | //lcs ausgabe aktualisieren
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140 |
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141 | show_values();
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142 |
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143 |
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144 | }
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145 |
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146 | int getRPM()
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147 | {
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148 | // sample for sampleTime in millisecs
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149 | int kount=0;
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150 | boolean kflag=LOW;
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151 | unsigned long currentTime=0;
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152 | unsigned long startTime=millis();
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153 | while (currentTime<=sampleTime)
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154 | {
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155 | if (digitalRead(hallPin)==HIGH)
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156 | {
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157 | kflag=HIGH;
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158 | }
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159 | if (digitalRead(hallPin)==LOW && kflag==HIGH)
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160 | {
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161 | kount++;
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162 | kflag=LOW;
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163 | }
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164 | currentTime=millis()-startTime;
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165 | }
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166 | int kount2rpm = int(60000./float(sampleTime))*kount;
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167 | return kount2rpm;
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168 | }
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169 |
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170 | void displayRPM(int rpm)
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171 | {
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172 |
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173 | // set the cursor to column 0, line 1
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174 | lcd.setCursor(0,3);
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175 | // print the number of seconds since reset:
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176 | lcd.print("Drehzahl:");
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177 | lcd.print(rpm,DEC);
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178 | lcd.setCursor(15,3);
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179 | lcd.print("U/min");
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180 | }
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