Init commit with many years of arduino sketches and projects. I dont know if the esp8266 includes much, but there are also libraries. I hope they dont have crazy automatic versioning through the Arduino IDE.

Projects/Temp Main/Temp_All/Temp_All.ino

@@ -0,0 +1,114 @@
+
+int temperaturePin = 0;
+const int buttonPin = 0;
+
+int secondDisplayState = HIGH;
+const boolean ON = HIGH;
+const boolean OFF = LOW;
+int buttonState, Avrund;
+
+int firstDisplay[] = {10, 9, 8, 7, 6, 5, 4};
+
+int data = 11;
+int latch = 12;
+int clock = 13;
+
+byte firstNumber[10][7] = {
+{ON, ON, ON, OFF, ON, ON, ON}, // 0
+{ON, OFF, OFF, OFF, OFF, OFF, ON}, // 1
+{OFF, ON, ON, ON, OFF, ON, ON}, // 2
+{ON, ON, OFF, ON, OFF, ON, ON}, // 3
+{ON, OFF, OFF, ON, ON, OFF, ON}, // 4
+{ON, ON, OFF, ON, ON, ON, OFF}, // 5
+{ON, ON, ON, ON, ON, ON, OFF}, // 6
+{ON, OFF, OFF, OFF, OFF, ON, ON}, // 7
+{ON, ON, ON, ON, ON, ON, ON}, // 8
+{ON, ON, OFF, ON, ON, ON, ON}};  // 9
+
+byte secondNumber[5][7] = {
+{OFF, ON, ON, ON, ON, ON, ON}, // 0
+{OFF, OFF, OFF, ON, OFF, OFF, ON}, // 1
+{ON, ON, ON, OFF, OFF, ON, ON}, // 2
+{ON, ON, OFF, ON, OFF, ON, ON}, // 3
+{ON, OFF, OFF, ON, ON, OFF, ON}}; // 4
+void setup()
+{
+  pinMode(buttonPin, INPUT);
+  
+  Serial.begin(9600);
+  
+  for (int i = 0; i < 7; i++)
+  {
+    pinMode(firstDisplay[i], OUTPUT);
+  }
+  pinMode(data, OUTPUT);
+  pinMode(clock, OUTPUT);  
+  pinMode(latch, OUTPUT);
+}
+void loop()
+{
+  Avrund = 0;
+  buttonState = digitalRead(buttonPin);
+  if (buttonState == LOW)
+  {
+    float temperature = getVoltage(temperaturePin);
+    temperature = (temperature - .5) * 100;
+
+    Serial.print(temperature); 
+    Serial.println(" Celsius");
+    
+    temperature = temperature * 10;
+    int intConvertedTemp = (int) temperature;
+    String stringConvertedTemp = (String) intConvertedTemp;
+    
+    for (int i = 0; i < 10; i++)
+    {
+      if (stringConvertedTemp.substring(0,1) == (String) i)
+      {
+        for (int j = 0; j < 7; j++)
+        {
+          changeThe7Segments(j, secondNumber[i][j]);
+        }
+      }
+      if (stringConvertedTemp.substring(2,3) > "5")
+      {
+        Avrund = 1;
+      }
+      if (stringConvertedTemp.substring(1,2) == (String) i)
+      {
+        for (int j = 0; j < 7; j++)
+        {
+          digitalWrite(firstDisplay[j], firstNumber[i + Avrund][j]);
+        }
+      }
+    } 
+    delay(1250);
+    for (int i = 0; i < 7; i++)
+    {
+      digitalWrite(firstDisplay[i], OFF);
+      changeThe7Segments(i, OFF);
+    }
+  }
+}
+float getVoltage(int pin)
+{
+   return (analogRead(pin) * .004882814);
+}
+void updateSecondDisplay(int value)
+{
+  digitalWrite(latch, LOW);
+  shiftOut(data, clock, MSBFIRST, value);
+  digitalWrite(latch, HIGH);
+}
+int bits[] = {B00000001, B00000010, B00000100, B00001000, B00010000, B00100000, B01000000, B10000000};
+int masks[] = {B11111110, B11111101, B11111011, B11110111, B11101111, B11011111, B10111111, B01111111};
+
+ void changeThe7Segments(int led, int state)
+ {
+   secondDisplayState = secondDisplayState & masks[led];
+   if(state == ON)
+   {
+     secondDisplayState = secondDisplayState | bits[led];
+   } 
+   updateSecondDisplay(secondDisplayState);
+ }