But his problem was that the component's own TouchPress and/or TouchRelease event code would still be executed afterwards, probably going to a different page, which would prevent displaying the help text correctly. So, he thought that he'd use a TouchCap component to intercept the event chain before the component's own event code was executed, to decide if, in case the help mode was active, the help screen would be displayed. Since in his project, there are nearly 1000 components on several screens, reworking each single component's event code to decide if the event code should be executed or the help screen displayed, is definitively not an option. That means that after activating this help mode, the user would click on an arbitrary component and instead of executing the component's event code, a help screen with explanations would be displayed. What he wants to achieve is activating a "Help" mode on his Nextion project. NewPing sonar (TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE) // NewPing setup of pins and maximum distance.In the Nextion user forums, a participant from Europe, let's call him M., asked an interesting question. Here’s an example code: # include # define TRIGGER_PIN 9 # define ECHO_PIN 10 # define MAX_DISTANCE 400 // Maximum distance we want to measure (in centimeters). Using the NewPing library we can get the distance with just a single line of code. Then according to those results we calculated the distance based on it. An Arduino UNO is a low-cost, open-source microcontroller board based on the ATmega328P microcontroller chip and developed by It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, an ICSP header, and a RESET button. In the previously explained code we manually triggered the sensor and measured the received signal pulse duration. There are actually a simpler and better way to program the Arduino to measure distance using the HC-SR04 ultrasonic sensor, and that’s using the NewPing library. void setup () Code language: Arduino ( arduino ) Example Code Using the NewPing Library In the setup we have to define the trigPin as an output and the echoPin as an Input and also start the serial communication for showing the results on the serial monitor. Int distance Code language: Arduino ( arduino ) The Ethernet Shield 2 has a standard RJ-45 connection. The most recent revision of the board exposes the 1.0 pinout on rev 3 of the Arduino UNO Board. This keeps the pin layout intact and allows another Shield to be stacked on top of it. defines pins numbers const int trigPin = 9 The Ethernet Shield 2 connects to an Arduino Board using long wire-wrap headers extending through the Shield. Then we need a Long variable, named “duration” for the travel time that we will get from the sensor and an integer variable for the distance. Secondary pins are mostly communications pins such as I2C and SPI. There are pins with secondary functions as listed below. In this case they are the pins number 9 and 10 on the Arduino Board and they are named trigPin and echoPin. The Arduino UNO board is divided into digital, analog, and power pins. } Code language: Arduino ( arduino ) Code Explanationįirst we have to define the Trig and Echo pins. Prints the distance on the Serial Monitor Serial. Reads the echoPin, returns the sound wave travel time in microseconds Sets the trigPin on HIGH state for 10 micro seconds digitalWrite(trigPin, HIGH) Clears the trigPin digitalWrite(trigPin, LOW) begin( 9600) // Starts the serial communication PinMode(trigPin, OUTPUT) // Sets the trigPin as an Output pinMode(echoPin, INPUT) // Sets the echoPin as an Input Serial. */ // defines pins numbers const int trigPin = 9 Ultrasonic Sensor HC-SR04 and Arduino Tutorial Here’s a code for measuring distance using the HC-SR04 ultrasonic sensor and Arduino. As an Amazon Associate I earn from qualifying purchases. Breadboard and Jump Wires ……… Amazon / Banggood / AliExpressĭisclosure: These are affiliate links.Arduino Board …………………………… Amazon / Banggood / AliExpress.Ultrasonic Sensor HC-SR04 ………… Amazon / Banggood / AliExpress.You can get these components need for this tutorial from any of the sites below: The Ground and the VCC pins of the module needs to be connected to the Ground and the 5 volts pins on the Arduino Board respectively and the trig and echo pins to any Digital I/O pin on the Arduino Board.
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