Custom iOS app using the SDK doesn't interact with device

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1

I’m following the tutorial and reference guide to be able to create my own iOS app for the Particle Photon, however I’m facing a small issue.

@IBAction func login(sender: Any) {
        SparkCloud.sharedInstance().login(withUser: email, password: password) { (error:Error?) -> Void in
            if let _ = error {
                print("Wrong credentials or no internet connectivity, please try again")
            }
            else {
                print("Logged in")
                var myPhoton : SparkDevice?
                SparkCloud.sharedInstance().getDevices { (devices:[SparkDevice]?, error:Error?) -> Void in
                    if let _ = error {
                        print("Check your internet connectivity")
                    }
                    else {
                        if let d = devices {
                            for device in d {
                                myPhoton = device
                                print(myPhoton!)
                                let funcArgs = ["D7",1] as [Any]
                                _ = myPhoton?.callFunction("digitalWrite", withArguments: funcArgs) { (resultCode : NSNumber?, error : Error?) -> Void in
                                    if (error == nil) {
                                        print("LED on D7 successfully turned on")
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

Everything works and I manage to connect to my Particle Photon, however the LED on my Particle Photon doesn’t actually light up. I’m still new to this. Can anyone help me please? Thanks.

2

If Tinker is running on the device, you'll need to have the argument be "D7,HIGH".

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4

Wow thank you very much! It started working! Can you please explain a little for me on what was the difference? Thanks.

5

If you look at the code, that’s what it expects:
https://docs.particle.io/guide/getting-started/examples/photon/#tinker

/*******************************************************************************
 * Function Name  : tinkerDigitalWrite
 * Description    : Sets the specified pin HIGH or LOW
 * Input          : Pin and value
 * Output         : None.
 * Return         : 1 on success and a negative number on failure
 *******************************************************************************/
int tinkerDigitalWrite(String command)
{
    bool value = 0;
    //convert ASCII to integer
    int pinNumber = command.charAt(1) - '0';
    //Sanity check to see if the pin numbers are within limits
    if (pinNumber < 0 || pinNumber > 7) return -1;

    if(command.substring(3,7) == "HIGH") value = 1;       // <------- over here.
    else if(command.substring(3,6) == "LOW") value = 0;      // <------- over here.
    else return -2;

    if(command.startsWith("D"))
    {
        pinMode(pinNumber, OUTPUT);
        digitalWrite(pinNumber, value);
        return 1;
    }
    else if(command.startsWith("A"))
    {
        pinMode(pinNumber+10, OUTPUT);
        digitalWrite(pinNumber+10, value);
        return 1;
    }
#if Wiring_Cellular
    else if(command.startsWith("B"))
    {
        if (pinNumber > 5) return -4;
        pinMode(pinNumber+24, OUTPUT);
        digitalWrite(pinNumber+24, value);
        return 1;
    }
    else if(command.startsWith("C"))
    {
        if (pinNumber > 5) return -5;
        pinMode(pinNumber+30, OUTPUT);
        digitalWrite(pinNumber+30, value);
        return 1;
    }
#endif
    else return -3;
}
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