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Trace: • Temperature Measurement Using Thermistor • ESP32-Cx Family • Manipulating analogue signals • IoT and Embedded Systems Programming Models • Digital ports, reading inputs, outputting data

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en:iot-open:introductiontoembeddedprogramming2:cppfundamentals:analog_io [2023/11/21 22:25] – pczekalskien:iot-open:introductiontoembeddedprogramming2:cppfundamentals:analog_io [2023/11/23 10:21] (current) – pczekalski
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 ====== Manipulating analogue signals ====== ====== Manipulating analogue signals ======
 +{{:en:iot-open:czapka_b.png?50| General audience classification icon }}{{:en:iot-open:czapka_m.png?50| General audience classification icon }}{{:en:iot-open:czapka_e.png?50| General audience classification icon }}\\
 The analogue inputs and outputs are used when the signal can take a range of values, unlike the digital signal that takes only two values (//HIGH// or //LOW//).  The analogue inputs and outputs are used when the signal can take a range of values, unlike the digital signal that takes only two values (//HIGH// or //LOW//). 
  
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 <code c> <code c>
-#define LED_pin 3              //the pin number is chosen to support PWM generation+#define LED_pin 3          //the pin number is chosen to support PWM generation
  
 void setup() { void setup() {
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 } }
  
-int value;                     //variable that holds the result of analogue reading+int value;                 //variable that holds the result of analogue reading
  
 void loop() { void loop() {
-  value = analogRead(A0);      //analogRead on Arduino Uno returns the value in the range 0 - 1023 +  value = analogRead(A0);  //analogRead on Arduino Uno returns the value 0-1023 
-  value = value >> 2;          //it should be converted to the value of the range 0 - 255+  value = value >> 2;      //it should be converted to the value 0-255
   analogWrite(LED_pin, value); //writing converted value to PWM output   analogWrite(LED_pin, value); //writing converted value to PWM output
 } }
en/iot-open/introductiontoembeddedprogramming2/cppfundamentals/analog_io.1700605522.txt.gz · Last modified: 2023/11/21 22:25 by pczekalski
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