User Manual

www.geolink.io
User Manual (1.4.0) OpenTracker 2.4 15
Using the Inputs (IN1 / IN2)
This example shows how to read the analog inputs on the Main Connector (External IO) and print the output
to the debug port.
1. #define DEBUG 1 //enable debug msg, sent to serial port
2. #define debug_port SerialUSB
3.
4. #ifdef DEBUG
5. #define debug_print(x) debug_port.print(x)
6. #else
7. #define debug_print(x)
8. #endif
9.
10. // Variables will change:
11. int outputValue;
12. int sensorValue;
13.
14.
15. void setup() {
16. // put your setup code here, to run once:
17.
18. }
19.
20. void loop() {
21.
22. // Read IN1 Value
23. // read the analog in value:
24. sensorValue = analogRead(AIN_EXT_IN1);
25. // map it to the range of the analog out:
26. outputValue = sensorValue * (242.0f / 22.0f * ANALOG_VREF / 1024.0f);
27.
28. // print the results to the serial monitor:
29. debug_print(F("IN1 = " ));
30. debug_print(outputValue);
31. debug_print(F("V ("));
32. debug_print(sensorValue);
33. debug_print(F(")"));
34. debug_port.println(" ");
35.
36. // Read IN2 Value
37. // read the analog in value:
38. sensorValue = analogRead(AIN_EXT_IN2);
39. // map it to the range of the analog out:
40. outputValue = sensorValue * (242.0f / 22.0f * ANALOG_VREF / 1024.0f);
41.
42. // print the results to the serial monitor:
43. debug_print(F("IN2 = " ));
44. debug_print(outputValue);
45. debug_print(F("V ("));
46. debug_print(sensorValue);
47. debug_print(F(")"));
48. debug_port.println(" ");
49.
50. delay(1000);
51. }