en:netzer:hc-sr04

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en:netzer:hc-sr04 [2014/10/03 17:32] – [Detecting the distance to an object with an ultransonic sensor] sveschen:netzer:hc-sr04 [2025/06/11 20:42] (current) – external edit 127.0.0.1
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 With the capture capability of Netzer a simple ultrasonic sensor like the HC-SR04 module can be used. With the capture capability of Netzer a simple ultrasonic sensor like the HC-SR04 module can be used.
  
-<imgcaption sensor_photo|Ultrasonic sensor HC-SR04>{{:en:netzer:hc-sr04_front.jpg}}{{:en:netzer:hc-sr04_back.jpg?direct|}}</imgcaption>+<imgcaption sensor_photo|Ultrasonic sensor HC-SR04>{{hc-sr04_front.jpg}}{{hc-sr04_back.jpg|}}</imgcaption>
  
 For that reason the sensor shall be connected like: For that reason the sensor shall be connected like:
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 Datasheet of the sensor states that at least 10 µs pulse must be generated to start the measurement. Datasheet of the sensor states that at least 10 µs pulse must be generated to start the measurement.
  
-<imgcaption labeltext|Configuration of IO3 for trigger>{{io3config_ultrasonic.gif}}</imgcaption>+<imgcaption io3_config|Configuration of IO3 for trigger>{{io3config_ultrasonic.gif}}</imgcaption>
  
 Due to the ultrasonic sensor has a resolution of about 0.3 cm it is sufficient to configure the resolution to 800 ns. The maximum values to measure (18 meters) are more than enough for the maximum of 3 meters the sensor will return. Due to the ultrasonic sensor has a resolution of about 0.3 cm it is sufficient to configure the resolution to 800 ns. The maximum values to measure (18 meters) are more than enough for the maximum of 3 meters the sensor will return.
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 IO0 is triggered by the rising edge of the sensor capture signal ECHO. IO0 is triggered by the rising edge of the sensor capture signal ECHO.
  
-{{io0config_ultrasonic.gif?direct|}}+<imgcaption io0config|IO0 configure for starting measurement>{{io0config_ultrasonic.gif}}</imgcaption>
  
 Important is to mark the "Impulse timer Reset" checkbox. Important is to mark the "Impulse timer Reset" checkbox.
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 SPI_INT is connected to the ECHO pin, too. SPI_INT is connected to the ECHO pin, too.
  
-{{spiint_config_ultrasonic.gif?direct|}}+<imgcaption spiint_config|Config of SPI_INT>{{spiint_config_ultrasonic.gif|}}</imgcaption>
  
 The falling edge of the ECHO signal will stop the capture timer and finally show the result on the GPIO webpage. The falling edge of the ECHO signal will stop the capture timer and finally show the result on the GPIO webpage.