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56 lines
1.6 KiB
56 lines
1.6 KiB
5 years ago
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// these constants describe the pins. They won't change:
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const int xpin = A1; // x-axis of the accelerometer
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const int ypin = A2; // y-axis
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const int zpin = A3; // z-axis (only on 3-axis models)
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//
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int sampleDelay = 500; //number of milliseconds between readings
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void setup()
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{
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// initialize the serial communications:
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Serial.begin(9600);
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//
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//Make sure the analog-to-digital converter takes its reference voltage from
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// the AREF pin
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pinMode(xpin, INPUT);
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pinMode(ypin, INPUT);
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pinMode(zpin, INPUT);
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}
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void loop()
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{
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int x = analogRead(xpin);
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//
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//add a small delay between pin readings. I read that you should
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//do this but haven't tested the importance
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delay(1);
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//
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int y = analogRead(ypin);
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//
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//add a small delay between pin readings. I read that you should
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//do this but haven't tested the importance
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delay(1);
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//
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int z = analogRead(zpin);
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//
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//zero_G is the reading we expect from the sensor when it detects
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//no acceleration. Subtract this value from the sensor reading to
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//get a shifted sensor reading.
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float zero_G =512;
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//
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//scale is the number of units we expect the sensor reading to
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//change when the acceleration along an axis changes by 1G.
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//Divide the shifted sensor reading by scale to get acceleration in Gs.
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float scale =102.3;
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//
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Serial.print(((float)x - zero_G)/scale);
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Serial.print("\t");
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//
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Serial.print(((float)y - zero_G)/scale);
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Serial.print("\t");
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//
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Serial.print(((float)z - zero_G)/scale);
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Serial.print("\n");
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//
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// delay before next reading:
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delay(sampleDelay);
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}
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