[ The onboard RGB LED glowing red, green, then blue ]
1. Meet the onboard RGB LED
Your pinGPT has a single multicolor LED soldered to the board, wired to GPIO 48. It's a tiny NeoPixel — one LED that can shine in any color you want.
2. Cycle through colors
Open Thonny, paste this program, and press Run:
python
from machine import Pin
from neopixel import NeoPixel
from time import sleep
# The onboard RGB LED is wired to GPIO 48
np = NeoPixel(Pin(48, Pin.OUT), 1)
while True:
np[0] = (255, 0, 0) # red
np.write(); sleep(0.5)
np[0] = (0, 255, 0) # green
np.write(); sleep(0.5)
np[0] = (0, 0, 255) # blue
np.write(); sleep(0.5)The LED should now cycle through red, green, and blue. You just spoke to hardware in real time.
3. Read the onboard button
pinGPT also has a built-in button on GPIO 0. Let's make the LED change color when you press it:
python
from machine import Pin
from neopixel import NeoPixel
button = Pin(0, Pin.IN, Pin.PULL_UP)
np = NeoPixel(Pin(48, Pin.OUT), 1)
while True:
if button.value() == 0: # pressed
np[0] = (0, 255, 0) # green
else:
np[0] = (50, 0, 50) # purple idle
np.write()[ Pressing the onboard button turns the LED green ]
What just happened
You used outputs (the RGB LED) and inputs (the button) at the same time — the two building blocks of every interactive electronics project. Stop the program any time with Ctrl + C.