SPECIFICATIONS

Thanks to the selfless sharing of the user Phoenix, the following test code is written for him, suitable for testing a variety of rocker or button code. Does not differentiate the board. IDE board with 1.8.6. If the latest update is not tested)

//This code is provided by phoenix.
// Only joysticks and buttons on all interfaces are tested.
//Only test the rocker and buttons on all interfaces.

void setup(void)
{
Serial.begin(9600); // Set the serial port communication rate to 9600 baud
for ( int i = 0;  i<=13;  i++)// Define the button position
{
pinMode(i,INPUT_PULLUP);
digitalWrite(i, 1);
}
}

void loop(void)
{
//******************* joystick position judgment, from port to port from 0-13; A1-A5(14-20)
for ( int i = 0;  i<=20;  i++)// From ports 0 to 20
{
Serial.print(i);
Serial.print("=");
Serial.print(analogRead(i)); // Read the value of rocker X axis, serial port display
Serial.print(";" );
}
/ / * * * * * * * * * * * * * * * * * * * * * * * * * * * * Button position judgment, from port 0-13,; A1-A5(14-20)
int i, someInt, flag = 0;
for (i = 0;  i<=20;  i++) // From ports 0 to 20
{
if (digitalRead(i) == 0) // Read the status of the button and determine whether to press it
{
Serial.print("button=");
Serial.print(i);
Serial.print(";" );
}
}
Serial.println(""); // End a line

delay(100);    // Refresh once 100ms
}