Blynk Joystick ((link)) -

BLYNK_WRITE(V1) // X Axis int xVal = param.asInt(); servoPan.write(map(xVal, 0, 255, 0, 180));

#define BLYNK_TEMPLATE_ID "YourTemplateID" #define BLYNK_DEVICE_NAME "YourDeviceName" #define BLYNK_AUTH_TOKEN "YourAuthToken"

#define BLYNK_TEMPLATE_ID "YOUR_TEMPLATE_ID" #define BLYNK_DEVICE_NAME "Robot Controller" #define BLYNK_AUTH_TOKEN "YOUR_AUTH_TOKEN" blynk joystick

// The X-axis controls steering. // If the joystick is pushed to the right, we reduce the speed of the right motor. motorSpeedA = motorSpeedA - map(X_Value, 0, 255, -255, 255); // If the joystick is pushed to the left, we reduce the speed of the left motor. motorSpeedB = motorSpeedB + map(X_Value, 0, 255, -255, 255);

: The joystick returns to the center position when you lift your thumb. BLYNK_WRITE(V1) // X Axis int xVal = param

When Blynk launched, its primary innovation was the drag-and-drop interface. It allowed users to build a GUI (Graphical User Interface) in minutes. The Joystick widget was the star of this show. It was intuitive. A child who couldn't write a line of C++ understood that pushing the digital stick forward made the wheels of their RC car turn.

Positive values mean forward movement; negative values mean reverse. motorSpeedB = motorSpeedB + map(X_Value, 0, 255, -255,

Wi-Fi control via Blynk cloud servers typically has 100-300ms delay. This is fine for a garden robot but bad for a race car.

: Wi-Fi drops can cause safety hazards. Write safety code that automatically cuts power to your motors if Blynk.connected() returns false.

void setup() pinMode(joystickX, INPUT); pinMode(joystickY, INPUT); Blynk.begin(auth, WiFi, 80);