ENG-CANSAT-TMP36 - Historique des versions

Admin le 25 août 2025 à 12:38

2025-08-25T12:38:56Z

2018-10-03T21:37:56Z

High resolution reading

2018-10-03T21:37:39Z

Low resolution reading

2018-10-03T21:37:24Z

Low resolution reading

2018-10-03T21:34:23Z

Testing the sensor

2018-10-03T21:33:00Z

Testing the sensor

2018-10-03T21:29:15Z

Low resolution reading

2018-10-03T21:22:59Z

Low resolution reading

2018-10-03T21:21:32Z

High resolution reading

2018-10-03T21:18:32Z

High resolution reading

← Version précédente		Version du 25 août 2025 à 12:38
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	The TMP36 is the reference analogue temperature sensor in the Arduino world. It is affordable, small et power efficient. For sure there are better temperature sensors but this one will do the job for almost nothing :-)		The TMP36 is the reference analogue temperature sensor in the Arduino world. It is affordable, small et power efficient. For sure there are better temperature sensors but this one will do the job for almost nothing :-)

−	This sensor is very common and easy to use. It is also one of the components of the {{pl\|11\|ARDX development kit}}.	+	This sensor is very common and easy to use. It is also one of the components of the {{deadpl\|11\|ARDX development kit}}.

@@ Ligne 169 : / Ligne 169 : @@
 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}}

@@ Ligne 117 : / Ligne 117 : @@
 Which produce the following result on the Serial Monitor
-[[Fichier:ENG-CANSAT-TMP36-60.png|480px]]
+[[Fichier:ENG-CANSAT-TMP36-60.png|640px]]
 {{ENG-CANSAT-TRAILER}}

@@ Ligne 117 : / Ligne 117 : @@
 Which produce the following result on the Serial Monitor
-[[Fichier:ENG-CANSAT-TMP36-60.png]]
+[[Fichier:ENG-CANSAT-TMP36-60.png|480px]]
 {{ENG-CANSAT-TRAILER}}

← Version précédente		Version du 3 octobre 2018 à 21:34
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	with 12bits we have an reading accuracy of 3.3 / 4095 = 0.000805 Volts, so 0.805 mV.		with 12bits we have an reading accuracy of 3.3 / 4095 = 0.000805 Volts, so 0.805 mV.

−
	=== Low resolution reading ===		=== Low resolution reading ===

@@ Ligne 56 : / Ligne 56 : @@
 == 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.}}
 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).
 with 12bits we have an reading accuracy of 3.3 / 4095 = 0.000805 Volts, so 0.805 mV.
 === Low resolution reading ===

@@ Ligne 96 : / Ligne 96 : @@
   */
 float getVoltage(int pin){
+   // AS the sketch does not call the analogReadResolution()
-    // Convert digital value between 0 & 4095 to
+   //    function to change the analog reading resolution
     //    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>
@@ Ligne 110 : / Ligne 115 : @@
 Which produce the following result on the Serial Monitor
-[[Fichier:ENG-CANSAT-TMP36-70.png]]
+[[Fichier:ENG-CANSAT-TMP36-60.png]]
 {{ENG-CANSAT-TRAILER}}

← Version précédente		Version du 3 octobre 2018 à 21:22
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	=== Low resolution reading ===		=== Low resolution reading ===

		+	<syntaxhighlight lang="c">
		+	// where is wired the TMP36
		+	const int temperaturePin = A3; // analogue input
		+
		+	// Executed once when starting the microcontroler
		+	void setup() {
		+	// start serial connexion with the computer
		+	Serial.begin(9600);
		+	}
		+
		+	// Executed again and again
		+	void loop() {
		+	// read the voltage of TMP36
		+	float voltage = getVoltage(temperaturePin);
		+	Serial.print( "Voltage : " );
		+	Serial.print( voltage );
		+	Serial.println( " Volts" );
		+	// convert voltage to temperature
		+	// Degrees = (voltage - 500mV) multiplied by 100
		+	float temperature = (voltage - .5) *100;
		+	Serial.print( "Temperature: " );
		+	Serial.print(temperature);
		+	Serial.println( " °C" );
		+	Serial.println( " " );
		+	delay(1000); // wait 1 second
		+	}
		+
		+	/*
		+	* getVoltage() - return the voltage of an analog pin
		+	*/
		+	float getVoltage(int pin){
		+
		+	// Convert digital value between 0 & 4095 to
		+	// voltage between 0 & 3.3 volts.
		+	// (each unit equal 3.3 / 4095 = 0.805 millivolts)
		+	return (analogRead(pin) * .000805);
		+	}
		+	</syntaxhighlight>
		+
		+	Once the sketch uploaded to the board, you can start the Serial Monitor
		+
		+	[[Fichier:ENG-CANSAT-BMP280-04.png]]
		+
		+	Which produce the following result on the Serial Monitor
		+
		+	[[Fichier:ENG-CANSAT-TMP36-70.png]]
		+
		+	{{ENG-CANSAT-TRAILER}}

	=== High resolution reading ===		=== High resolution reading ===