Input Devices

#include <SoftwareSerial.h>
int rxPin = A0; // this maps to the TX on the FDDI board
int txPin = A1; // this maps to the RX on the FDDI board
SoftwareSerial TinySerial(rxPin, txPin); // RX, TX

int Five_v_pullup = 7; // This is the pin am going to use to simulate 5v pullup

int sensorPin = A3;    // select the input pin for the potentiometer

int sensorValue = 0;  // variable to store the value coming from the sensor

void setup() {
  // declare the ledPin as an OUTPUT:
  TinySerial.begin(9600);
  TinySerial.println("Tiny Serial Connected via SoftwareSerial Library");

  // This configures the pin that is going to act as my 5v pullup (with resistor)
  pinMode(Five_v_pullup, OUTPUT); 
  digitalWrite(Five_v_pullup, HIGH);

  // This is setting up the analog read pin
  pinMode(sensorPin, INPUT);
}

void loop() {
 
  int current_high_value = 0;
  int current_log_value = 1024;
 
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);   
  if (sensorValue > current_high_value) {
      current_high_value = sensorValue;
      TinySerial.print("New HIGH:");
      TinySerial.println(current_high_value);
  }    
  if (sensorValue < current_low_value) {
      current_low_value = sensorValue;
      TinySerial.print("New LOW:");
      TinySerial.println(current_low_value);
  }    
  TinySerial.println(sensorValue);
} // loop