So first off the software app is awesome! That out of the way I do PLC programming and I’m new to C+ and Arduino. All I’m looking to do is pulse the Arduino output with a button press from my Android phone. I found the Button Interrupt example code works how I need it to. Push a button and the output pin pulses. What I’m having trouble with is getting the code right to add a second button.
So two questions:
1: Is there a simpler way to have the app button pulse the output pin with a press?
2: What would help is someone to modify the below code for one button and one output to have a 2nd button and output. I can look at the changes and see what the difference is and where. I learn best that way and can modify it from there.
Thank You
: Arduino UNO with Ethernet Shield
/*************************************************************
Download latest Blynk library here:
https://github.com/blynkkk/blynk-library/releases/latest
Blynk is a platform with iOS and Android apps to control
Arduino, Raspberry Pi and the likes over the Internet.
You can easily build graphic interfaces for all your
projects by simply dragging and dropping widgets.
Downloads, docs, tutorials: http://www.blynk.cc
Sketch generator: http://examples.blynk.cc
Blynk community: http://community.blynk.cc
Follow us: http://www.fb.com/blynkapp
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Blynk library is licensed under MIT license
This example code is in public domain.
*************************************************************
This example shows how to monitor a button state
using interrupts mechanism.
App project setup:
LED widget on V1
*************************************************************/
/* Comment this out to disable prints and save space */
#define BLYNK_PRINT Serial
#include <SPI.h>
#include <Ethernet.h>
#include <BlynkSimpleEthernet.h>
// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "MyTokenHere";
#define W5100_CS 10
#define SDCARD_CS 4
WidgetLED led1(V1);
// We make these values volatile, as they are used in interrupt context
volatile bool pinChanged = false;
volatile int pinValue = 0;
// Most boards won't send data to WiFi out of interrupt handler.
// We just store the value and process it in the main loop.
void checkPin()
{
// Invert state, since button is "Active LOW"
pinValue = !digitalRead(2);
// Mark pin value changed
pinChanged = true;
}
void setup()
{
// Debug console
Serial.begin(9600);
pinMode(SDCARD_CS, OUTPUT);
digitalWrite(SDCARD_CS, HIGH); // Deselect the SD card
Blynk.begin(auth);
// You can also specify server:
//Blynk.begin(auth, "blynk-cloud.com", 80);
//Blynk.begin(auth, IPAddress(192,168,1,100), 8080);
// Make pin 2 HIGH by default
pinMode(2, INPUT_PULLUP);
// Attach INT to our handler
attachInterrupt(digitalPinToInterrupt(2), checkPin, CHANGE);
}
void loop()
{
Blynk.run();
if (pinChanged) {
// Process the value
if (pinValue) {
led1.on();
} else {
led1.off();
}
// Clear the mark, as we have processed the value
pinChanged = false;
}
}