ESP32-S2-Saola-1 flashing light

dcexpert

ESP32-S2-Saola-1 flashing light [Copy link]

 

ESP32-S2-Saola-1 does not use a traditional LED as an indicator light, but uses a WS2812. The advantage is that it takes up less IO and displays rich colors, but the disadvantage is that the timing is more complicated. For the ESP32-S2 port of circuitpython, because the current version of the firmware does not support the underlying neopixel_write function, it is impossible to use WS2812 directly, and it needs to wait for the version upgrade to use it.

For ordinary LEDs, driving them is relatively easy. However, in CircuitPython, the usage is quite different from that in MicroPython. First, you need to import digitalio, then define the digitalio.DigitalInOut instance, and define the direction of the IO as output (digitalio.Direction.OUTPUT). To set the output of the IO, you assign a value to it. The specific method is as follows (assuming that GPIO2 is used to drive the LED):

import board
import digitalio
import time
led = digitalio.DigitalInOut(board.IO2)
led.direction = digitalio.Direction.OUTPUT
for i in range(10):
    led.value = True
    time.sleep(0.2)
    led.value = False
    time.sleep(0.2)

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Less code, concise

freebsder

Is there a big difference between MicroPython and CircuitPython?

dcexpert

freebsder posted on 2020-7-15 15:54 Is there a big difference between micropython and circuitpython?

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