rotary encoder (broken)

proofing_box.ino

@@ -8,15 +8,21 @@
 #include "DHT.h"
 #include "SoftwareSerial.h"
 
+const int pin_enco_1 = 2; // 2/3 are special pins. the encoder must be here
+const int pin_enco_2 = 3;
+const int pin_enco_sw = 4; // encoder switch
 const int pin_disp_tx = 8; // pin that the display RX is connected to.
 const int pin_disp_rx = 7; // needed to create the software serial. doesn't need physical connection
 const int baud_rate = 9600; // set correct baud rate. default of s7s is 9600
 const int disp_brightness = 255;
-const int pin_dht = 2; // pin that the DHT is connected to
+const int pin_dht = 12; // pin that the DHT is connected to
 const int dht_type = DHT22; // DHT 22 (AM2302)
 const int update_freq = 2000; // time to wait between loops
 
 char buff[10]; // display output buffer
+volatile int enco_prev = 0; // previous encoder direction
+volatile long enco_value = 25; // the current encoder value
+int target_temp;
 
 SoftwareSerial disp(pin_disp_rx, pin_disp_tx); // the display
 
@@ -28,15 +34,37 @@ void setup() {
  clearDisplay();
  setBrightness(disp_brightness);
  delay(100);
- disp.print("HELO");
+ disp.write("JELO");
 
  // init dht
  dht.begin();
+
+ // init encoder
+ pinMode(pin_enco_1, INPUT);
+ pinMode(pin_enco_2, INPUT);
+ pinMode(pin_enco_sw, INPUT);
+
+ digitalWrite(pin_enco_1, HIGH); // turn pullup resistor on
+ digitalWrite(pin_enco_2, HIGH); // turn pullup resistor on
+ digitalWrite(pin_enco_sw, HIGH); // turn pullup resistor on
+
+ attachInterrupt(0, updateEncoder, CHANGE); // call updateEncoder() when interrupt 0 (pin 2) or 1 (pin 3) change
+ attachInterrupt(1, updateEncoder, CHANGE);
+
+
+ // init system
+ setTargetTemperature(enco_value);
 }
 
 void loop() {
- delay(update_freq);
-
+
+ if (enco_value != target_temp) {
+ // encoder was rotated
+ setTargetTemperature(enco_value);
+
+ }
+
+
  float humid = dht.readHumidity(); 
  float temp = dht.readTemperature(false);
 
@@ -49,6 +77,8 @@ void loop() {
  float heat_index = dht.computeHeatIndex(temp, humid, false);
 
  writeTemperature(heat_index);
+
+ delay(update_freq);
 }
 
 void writeTemperature(float temp) {
@@ -59,6 +89,14 @@ void writeTemperature(float temp) {
  disp.print(buff);
 }
 
+void setTargetTemperature(int target) {
+ target_temp = target;
+ setDecimals(0b010000);
+ sprintf(buff, "T %2d", target_temp);
+ disp.print(buff);
+
+ delay(2000);
+}
 
 void clearDisplay() {
  disp.write(0x76); // clear command byte
@@ -73,3 +111,17 @@ void setDecimals(byte decimals) {
  disp.write(0x77); // decimal command byte
  disp.write(decimals); // (Apos)(Colon)(Digit 4)(Digit 3)(Digit2)(Digit1)
 }
+
+void updateEncoder() {
+ int msb = digitalRead(pin_enco_1);
+ int lsb = digitalRead(pin_enco_2);
+
+ int enco = (msb << 1) | lsb; // convert the 2 pin value to single number
+ int sum = (enco_prev << 2) | enco; // compare to the previous value
+
+ // add or subtract based on rotation
+ if (sum == 0b1101 || sum == 0b0100 || sum == 0b0010 || sum == 0b1011) enco_value++;
+ if (sum == 0b1110 || sum == 0b0111 || sum == 0b0001 || sum == 0b1000) enco_value--;
+
+ enco_prev = enco; // save for next time
+}