Drucksensor - Revision history

Nabla: /* Programming */

2023-09-01T09:05:50Z

Programming

Nabla at 09:03, 1 September 2023

2023-09-01T09:03:24Z

Nabla: Created page with "{{Infobox Experiment | Name = An external pressure sensor | Category = Arduino library experiments | Sensors = MPRLS }} File:PressureSensor2.jpg File:PressureSens..."

2023-09-01T08:54:49Z

Created page with "{{Infobox Experiment | Name = An external pressure sensor | Category = Arduino library experiments | Sensors = MPRLS }} File:PressureSensor2.jpg File:PressureSens..."

New page

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

[[File:PressureSensor2.jpg]]

[[File:PressureSensor1.jpg]]

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.
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. (Here the sensor data were sent to a PC via a serial connection.)

==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.

==Programming==
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.

<pre>

#include <Wire.h>
#include "Adafruit_MPRLS.h"
#include <phyphoxBle.h>
float Messwert;
#define RESET_PIN -1
#define EOC_PIN -1
Adafruit_MPRLS mpr = Adafruit_MPRLS(RESET_PIN, EOC_PIN);
void setup() {
PhyphoxBLE::start("Barometer_01");
//Experiment
PhyphoxBleExperiment experiment;
experiment.setTitle("Barometer_01");
experiment.setCategory("Arduino Experiments");
experiment.setDescription("Plot the pressure over time.");
//View
PhyphoxBleExperiment::View view;
//Value
PhyphoxBleExperiment::Value Value1;
Value1.setLabel("p = ");
Value1.setUnit("hPa");
Value1.setChannel(1);
//Graph
PhyphoxBleExperiment::Graph graph;
graph.setLabel("Druck");
graph.setUnitX("s");
graph.setUnitY("hPa");
graph.setLabelX("time");
graph.setLabelY("p");
view.addElement(graph);
view.addElement(Value1);
experiment.addView(view);
PhyphoxBLE::addExperiment(experiment);
Serial.begin(38400);
mpr.begin();
}
void loop() {
Messwert=0;
for(int i=0;i<37;i++){
Messwert+=mpr.readPressure();
delay(10);
}
Messwert=Messwert/37;
PhyphoxBLE::write(Messwert);
Serial.println(Messwert);
delay(10);
}

</pre>

← Older revision		Revision as of 09:05, 1 September 2023
Line 26:		Line 26:

	Es ist darauf zu achten, dass jeder ESP32 eine eigene Kennung hat (diese wird in ''PhyphoxBLE::start("Barometer_01")'' festgelegt). Anschließend kann über das Plus-Symbol in phyphox ein Bluetooth-Experiment hinzugefügt werden, das Experiment wird dann automatisch geladen.		Es ist darauf zu achten, dass jeder ESP32 eine eigene Kennung hat (diese wird in ''PhyphoxBLE::start("Barometer_01")'' festgelegt). Anschließend kann über das Plus-Symbol in phyphox ein Bluetooth-Experiment hinzugefügt werden, das Experiment wird dann automatisch geladen.
		+
		+	Der Sensor ist sehr schnell. Deshalb wird stark gemitelt.

@@ Line 11: / Line 11: @@
 [[File:PressureSensor1.jpg]]
-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.
+Der Drucksensor MPRLS ermöglicht Absolutdruckmessungen im Bereich 0 bis 25 PSI (1,72 bar). Die Auflösung ist so gut, dass sich 1 m Höhendifferenz auflösen lassen.  Die barometrische Höhenstufe auf Meeresniveaus beträgt 1 hPa auf 8 m.
-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. (Here the sensor data were sent to a PC via a serial connection.)
 ==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.
+Die Verdrahtung ist wie üblich bei I2C-Sensoren trivial: 3V3 – Vin, Gnd – Gnd, SCL – 22, SDA –21. Schlauerweise wurde kein Foto gemacht, bevor der Sensor mit Spiegeltape aufgeklebt und alles schön mit Schrumpfschlauch verpackt wurde.
 ==Programming==
-The definitions for the ESP32 and the phyphox library must be installed. See the video at [[:Category: Arduino library experiments]].
+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]].
 <pre>