An external pressure sensor - Revision history

Nabla at 09:41, 25 August 2023

2023-08-25T09:41:45Z

Nabla at 09:39, 25 August 2023

2023-08-25T09:39:23Z

Nabla at 09:37, 25 August 2023

2023-08-25T09:37:47Z

Nabla at 09:37, 25 August 2023

2023-08-25T09:37:34Z

Nabla at 09:24, 25 August 2023

2023-08-25T09:24:21Z

Nabla at 08:12, 25 August 2023

2023-08-25T08:12:37Z

Nabla: Created page with "{{Infobox Experiment | Name = An external pressure sensor | Category = Arduino library experiments | Sensors = Magentic Field }} Text Sensor =..."

2023-08-25T08:10:03Z

Created page with "{{Infobox Experiment | Name = An external pressure sensor | Category = Arduino library experiments | Sensors = Magentic Field }} Text Sensor =..."

New page

{{Infobox Experiment
| Name = An external pressure sensor
| Category = Arduino library experiments
| Sensors = Magentic Field
}}

Text

[[File:SpulenBFeld.jpg|Sensor]]

==Setup==
==Programmierung==
Der ESP32 wird über die Arduino IDE programmiert. Es müssen die Definitionen für den ESP32 und die phyphox-Bibliothek installiert sein. Siehe dazu das Video unter [[:Category: Arduino library experiments]].

Es ist darauf zu achten, dass jeder ESP32 eine eigene Kennung hat (diese wird in ''PhyphoxBLE::start("Magnetfeldsensor_01")'' festgelegt). Anschließend kann über das Plus-Symbol in phyphox ein Bluetooth-Experiment hinzugefügt werden, das Experiment wird dann automatisch geladen.

<pre>

#include <phyphoxBle.h>

int AnalogPin=27;
float Messwert;
float Offset;
float Magnetfeld;

void setup() {
PhyphoxBLE::start("Magnetfeldsensor_01"); //Start the BLE server

//Experiment
PhyphoxBleExperiment experiment;

experiment.setTitle("Magnetfeld");
experiment.setCategory("Arduino Experiments");
experiment.setDescription("Plot the magnetic field of a Hall sensor over time.");

//View
PhyphoxBleExperiment::View view;

//Value
// PhyphoxBleExperiment::Value Value1;
// Value1.setLabel("B = ");
// Value1.setUnit("mT");
// Value1.setChannel(1);

//Graph
PhyphoxBleExperiment::Graph graph;
graph.setLabel("B over time");
graph.setUnitX("s");
graph.setUnitY("mT");
graph.setLabelX("time");
graph.setLabelY("B");

view.addElement(graph); //Attach graph to view

// view.addElement(Value1);
experiment.addView(view); //Attach view to experiment
PhyphoxBLE::addExperiment(experiment); //Attach experiment to server

//Offsetkorrektur
Offset=0;
for(int i=0;i<7;i++){
Offset+=analogRead(AnalogPin);
delay(10);
}
Offset=Offset/7;

}

void loop() {

Messwert=0;
for(int i=0;i<37;i++){
Messwert+=analogRead(AnalogPin);
delay(10);
}
Messwert=Messwert/37;

Magnetfeld=(Messwert-Offset)*(-0.0492);
PhyphoxBLE::write(Magnetfeld);
// delay(50);
}

</pre>

==Arbeitsmaterialien==
Ein mögliches Schülerarbeitsblatt (aktuelle Sicherheitsrichtlinien nach RISU beachten!): [[file:AB_Magnetfeldsensor_Spule.pdf]]
[[Category:Arduino library experiments]]

@@ Line 12: / Line 12: @@
 The pressure sensor MPRLS enables absolute pressure measurements in the range 0 to 25 PSI (1.72 bar). The resolution is so good that a difference in altitude (in air) of 1 m can be resolved. The barometric height step at sea level is 1 hPa at 8 m.
 ==Setup==
 As usual with I2C sensors, the wiring is simple: 3V3 - Vin, Gnd - Gnd, SCL - 22, SDA -21. So no picture was taken before the sensor was taped on with mirror tape and everything was packaged with transparent shrink tube.
-If you connect the sensor with a thin hose, you can also measure the gravitational pressure in liquids very well as shown in the picture above.
 ==Programming==
 The definitions for the ESP32 and the phyphox library must be installed. See the video at [[:Category: Arduino library experiments]].

@@ Line 18: / Line 18: @@
 If you connect the sensor with a thin hose, you can also measure the gravitational pressure in liquids very well as shown in the picture above.
 ==Programming==
-Der ESP32 wird über die Arduino IDE programmiert. Es müssen die Definitionen für den ESP32 und die phyphox-Bibliothek installiert sein. Siehe dazu das Video unter [[:Category: Arduino library experiments]].
+The definitions for the ESP32 and the phyphox library must be installed. See the video at [[:Category: Arduino library experiments]].
 It must be ensured that each ESP32 has its own ID (this is defined in ''PhyphoxBLE::start("Barometer_01")''). A Bluetooth experiment can then be added via the plus symbol in phyphox, the experiment will then be loaded automatically.

← Older revision		Revision as of 09:37, 25 August 2023
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−	[[File:~~PressureSensor1~~.jpg]]	+	[[File:PressureSensor2.jpg]]

	[[File:PressureSensor1.jpg]]		[[File:PressureSensor1.jpg]]

← Older revision		Revision as of 09:24, 25 August 2023
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	Text		Text

−	[[File:~~SpulenBFeld~~.jpg~~\|Sensor~~]]	+	[[File:PressureSensor1.jpg]]

@@ Line 2: / Line 2: @@
   | Name = An external pressure sensor
   | Category = Arduino library experiments
-  | Sensors = Magentic Field
+  | Sensors = MPRLS
 }}
-Text
 [[File:PressureSensor1.jpg]]
 ==Setup==
-==Programmierung==
+As usual with I2C sensors, the wiring is simple: 3V3 - Vin, Gnd - Gnd, SCL - 22, SDA -21. So no picture was taken before the sensor was taped on with mirror tape and everything was packaged with transparent shrink tube.
 Der ESP32 wird über die Arduino IDE programmiert. Es müssen die Definitionen für den ESP32 und die phyphox-Bibliothek installiert sein. Siehe dazu das Video unter [[:Category: Arduino library experiments]].
-Es ist darauf zu achten, dass jeder ESP32 eine eigene Kennung hat (diese wird in ''PhyphoxBLE::start("Magnetfeldsensor_01")'' festgelegt). Anschließend kann über das Plus-Symbol in phyphox ein Bluetooth-Experiment hinzugefügt werden, das Experiment wird dann automatisch geladen.
+It must be ensured that each ESP32 has its own ID (this is defined in ''PhyphoxBLE::start("Barometer_01")''). A Bluetooth experiment can then be added via the plus symbol in phyphox, the experiment will then be loaded automatically.
 <pre>
@@ Line 68: / Line 73: @@
 </pre>

@@ Line 19: / Line 19: @@
 <pre>
-#include <phyphoxBle.h>
+#include <Wire.h>
+#include "Adafruit_MPRLS.h"
-int AnalogPin=27;
+#include <phyphoxBle.h>
 float Messwert;
-float Offset;
+#define RESET_PIN -1
-float Magnetfeld;
+#define EOC_PIN -1
+Adafruit_MPRLS mpr = Adafruit_MPRLS(RESET_PIN, EOC_PIN);
 void setup() {
-    PhyphoxBLE::start("Magnetfeldsensor_01");                //Start the BLE server
+PhyphoxBLE::start("Barometer_01");
 //Experiment
-    PhyphoxBleExperiment experiment;
+PhyphoxBleExperiment experiment;
+experiment.setTitle("Barometer_01");
-    experiment.setTitle("Magnetfeld");
+experiment.setCategory("Arduino Experiments");
-    experiment.setCategory("Arduino Experiments");
+experiment.setDescription("Plot the pressure over time.");
-    experiment.setDescription("Plot the magnetic field of a Hall sensor over time.");
+//View
 PhyphoxBleExperiment::View view;
-    //View
+//Value
-    PhyphoxBleExperiment::View view;
+PhyphoxBleExperiment::Value Value1;
+Value1.setLabel("p = ");
-    //Value
+Value1.setUnit("hPa");
-//    PhyphoxBleExperiment::Value Value1;
+Value1.setChannel(1);
-//    Value1.setLabel("B = ");
+//Graph
-//    Value1.setUnit("mT");
+PhyphoxBleExperiment::Graph graph;
-//    Value1.setChannel(1);
+graph.setLabel("Druck");
 graph.setUnitX("s");
-    //Graph
+graph.setUnitY("hPa");
-    PhyphoxBleExperiment::Graph graph;
+graph.setLabelX("time");
-    graph.setLabel("B over time");
+graph.setLabelY("p");
-    graph.setUnitX("s");
+view.addElement(graph);
-    graph.setUnitY("mT");
+view.addElement(Value1);
-    graph.setLabelX("time");
+experiment.addView(view);
-    graph.setLabelY("B");
+PhyphoxBLE::addExperiment(experiment);
+Serial.begin(38400);
-    view.addElement(graph);                 //Attach graph to view
+mpr.begin();
+}
 void loop() {
 Messwert=0;
-  Messwert=0;
+for(int i=0;i<37;i++){
-  for(int i=0;i<37;i++){
+Messwert+=mpr.readPressure();
-    Messwert+=analogRead(AnalogPin);
+delay(10);
 delay(10);
+}
 </pre>