Modifications

== Testing the sensor ==

== Testing the sensor ==

In the both case, the measured would be identical.

In the both case show here under, the measured temperature would be identical.

However, by default, the Arduino's {{fname|analogRead()}} use a 10 bit coding. So the range of possible value return by {{fname|analogRead()}} is 0 to 1024 (for 0 to 3.3v). This means that the accuracy of reading is 3.3 / 1024 = 0.0032 Volts, so 3.2 mV.

{{ambox|text=However, if your project does need a high resolution analog reads then it may be appropriate to explore the "High Resolution Reading" example.}}

 

By default, the Arduino's {{fname|analogRead()}} use a 10 bit coding. So the range of possible value return by {{fname|analogRead()}} is 0 to 1024 (for 0 to 3.3v). This means that the accuracy of reading is 3.3 / 1024 = 0.0032 Volts, so 3.2 mV.

As the M0 does have an ADC (''Analog-to-Digital Converter'') with a precision of 12 bits, we could also use the {{fname|analogReadResolution( 12 )}} to upgrade the {{fname|analogRead()}} resolution to 12 bits. In such case, the range of possible value return by {{fname|analogRead()}} is 0 to 4095 (for 0 to 3.3v). As we have a real 12bit ADC, we can rely on that accuracy (it is not a 10 bits ADC storing the data into a 12 bits integer).

As the M0 does have an ADC (''Analog-to-Digital Converter'') with a precision of 12 bits, we could also use the {{fname|analogReadResolution( 12 )}} to upgrade the {{fname|analogRead()}} resolution to 12 bits. In such case, the range of possible value return by {{fname|analogRead()}} is 0 to 4095 (for 0 to 3.3v). As we have a real 12bit ADC, we can rely on that accuracy (it is not a 10 bits ADC storing the data into a 12 bits integer).

  */

  */

float getVoltage(int pin){

float getVoltage(int pin){

 

   // Convert digital value between 0 & 4095 to  

   // Convert digital value between 0 & 1024 to  

   //    voltage between 0 & 3.3 volts.

   //    voltage between 0 & 3.3 volts.

   //    (each unit equal 3.3 / 4095 = 0.805 millivolts)

   //    (each unit equal 3.3 / 1024 = 3.2 millivolts)

   return (analogRead(pin) * .000805);

   return (analogRead(pin) * .0032);

}

}

</syntaxhighlight>

</syntaxhighlight>

Which produce the following result on the Serial Monitor

Which produce the following result on the Serial Monitor

[[Fichier:ENG-CANSAT-TMP36-70.png]]

[[Fichier:ENG-CANSAT-TMP36-60.png|640px]]

{{ENG-CANSAT-TRAILER}}

{{ENG-CANSAT-TRAILER}}

Which produce the following result on the Serial Monitor

Which produce the following result on the Serial Monitor

[[Fichier:ENG-CANSAT-TMP36-70.png]]

[[Fichier:ENG-CANSAT-TMP36-70.png|640px]]

{{ENG-CANSAT-TRAILER}}

{{ENG-CANSAT-TRAILER}}