I’m just received my Spark Core today and i’m learning al kind of things today. The one problem is that I want to control my pins with a webpage with buttons. I have little knowledge of API’s and other related subjects and I have searched around the forums and Google to give me some insight on sending and receving data.
These are about as simple as it gets on the core side and use a cross-platform tool called curl to do HTML requests like a web browser but from the command line. It’s a great debugging tool.
Ok, so now you need to go back and look at the Spark Variable and Function on One Web Page and make some minor edits. You don’t want the slider, but you do want four buttons (you could do it with two, I just did four).
Add your device id and access token to this HTML and save it as a local file. Open it in a web browser with the file:///path/to/file/filename.html URL and click away! Remember to keep your access_token private since that identifies you.
I think you are missing some of the HTML file, there are more lines below the last line in your file. I think you need to copy-paste again from the forum and scroll down a bit in the code window, which has its own little scroll bar.
Almost fixed
The devils in the details. It worked, but my 2nd led doest work.
my code is
// name the pins
int led1 = D0;
int led2 = D7;
Wanted to get the led going which I thought was on d7. regardless d7 doesnt go high.
Later note. fixed this code
if (pinNumber < 0 || pinNumber > 7) return -1; //(the 7 was a 1)
still not going on pin 7
STILL NOT WORKING ON PIN 7.
Dare I ask, how do we read a0 pin on the web.
this makes it work (same is pin0) so the problem is in the lines above
digitalWrite(pinNumber, state);
digitalWrite(7, state);// hard coded as a test. works!
I don’t fully understand the code above and not sure how to do a simple print to console so I can dig into the code
Hi! @BDub due to use of ur projects but with some modifications I did marked you and I guess that you’ll probably know where’s the problem in my case.
I will just jump into this topic because of similar issues on my own project and for not “spamming” by opening new topic
So, as I manage to control output pins with my web app and I’ve even added the variables with state like (ON, OFF) (see pic below), therefore a quite strange issues is appearing.
As I click on D0 button first time, it changes the state of pin to high as it changes the variable state to “ON” and than again when button D0 is presses for second time the pin output is still HIGH and only the variable state changes as it should, so after that the state of variable “ON/OFF” is no more same as the pin output.
So where’s the problem or do i need somehow do this in the code area??
If anyone could help I’d appriciate
I guess that was not so understandable explained above
The state variable is going “ON/OFF” on each press but the state of OUTPUT pin is not good on every click.
start default variable OFF, output pin low (led off),
click variable ON, output pin high (led on),
click variable OFF, output pin high (led on),
click variable ON, output pin low (led off),
click variable OFF, output pin low (led off),
and so on…
Ok, I looked over your code and I think I understand what you are trying to accomplish. In the function testFunction you are sending the string “args” as a variable but you are not using this in your function. I will assume that you only use the button to change the states of the variables and you then read back the states to display “ON” or “OFF” on the website accordingly.
Mayby you should try something more like this:
//Variables declared at the start
int stateD0 = 0;
int stateD7 = 0;
void testFunction(String outputPin) {
if(outputPin == "D0")
{
stateD0 = !stateD0;
digitalWrite(D0, stateD0);
}
if(outputPin == "D7")
{
stateD7 = !stateD7;
digitalWrite(D7, stateD7);
}
}
So when you press the button you need to call the function as follows:
testFunction("D0");
or
testFunction("D7");
Hope this helps. If not, send me your full code so I can how you handle the buttons.
@mstelt
Heh after modification, idk what have happend but nor the outputPin works nor the ON/OFF state
So I’d put back old code and here it is and if is needed i can send the web app too.
#define ON 1
#define OFF 0
bool state = LOW;
int lightState = 0;
//int LIGHTPIN = D0;
void setup()
{
Spark.function("RoomLight", testFunction);
Spark.function("GarageDoor", test2Function);
//Spark.function("light", lightFunction);
Spark.variable("lightstate", &lightState, INT);
pinMode(D0, OUTPUT);
pinMode(D7, OUTPUT);
//pinMode(LIGHTPIN, OUTPUT);
digitalWrite(D0, LOW);
digitalWrite(D7, LOW); // turn on D7 by default
//digitalWrite(LIGHTPIN, LOW);
}
void loop() {
// do nothing
}
//testFunction modificating only for oneOUTPUT pin (D0)
int testFunction(String args)
{
if(lightState != ON)
{
lightState = ON; //light ON
state = !state; // toggle the state
digitalWrite(D0, state); // update the LED to see some action
}
else {
lightState = OFF;
}
return 200; // This is checked in the web app controller for validation
}
//test2Function without variable state change ON/OFF works fine
int test2Function(String args) {
state = !state;
digitalWrite(D7, state);
return 200;
}
#define ON 1
#define OFF 0
int lightState = 0;
//int LIGHTPIN = D0;
void setup()
{
Spark.function("RoomLight", testFunction);
Spark.function("GarageDoor", test2Function);
//Spark.function("light", lightFunction);
Spark.variable("lightstate", &lightState, INT);
pinMode(D0, OUTPUT);
pinMode(D7, OUTPUT);
//pinMode(LIGHTPIN, OUTPUT);
digitalWrite(D0, LOW);
digitalWrite(D7, LOW); // turn on D7 by default
//digitalWrite(LIGHTPIN, LOW);
}
void loop() {
// do nothing
}
//testFunction modificating only for oneOUTPUT pin (D0)
int testFunction(String args)
{
if(lightState == OFF)
{
lightState = ON; //light ON
digitalWrite(D0, lightState); // update the LED to see some action
}
else
{
lightState = OFF; //light OFF
digitalWrite(D0, lightState); // update the LED to see some action
}
return 200; // This is checked in the web app controller for validation
}
//test2Function without variable state change ON/OFF works fine
int test2Function(String args) {
state = !state;
digitalWrite(D7, state);
return 200;
}
Still, when you call the “int testFunction(String args)” the variable “args” doesn’t do anything in the code. Depending or your webapp you can either call the function without argumentes (if you want different functions for different buttons) or you could use the “args” to choose a OUTPUT pin for example.
