gpio.zip_ESP32 GPIO

# Example: GPIO This test code shows how to configure gpio and how to use gpio interrupt. ## GPIO functions: * GPIO18: output * GPIO19: output * GPIO4: input, pulled up, interrupt from rising edge and falling edge * GPIO5: input, pulled up, interrupt from rising edge. ## Test: * Connect GPIO18 with GPIO4 * Connect GPIO19 with GPIO5 * Generate pulses on GPIO18/19, that triggers interrupt on GPIO4/5