Friday 24 April 2026 50 versions

Was taugen billige Micro-Controller? ¶

‘Cheap-Yellow-Display’ ¶

Sunton `ESP32-2432S028` ¶

verschiedene Hersteller
- Amazon: 15 - 20 €
ESP32 (mit 2.4GHz Wifi und Bluetooth)
- 32-Bit Tensilica dual core cpu
- Memory: 4MB flash
2,8"-LCD mit 240x320 Pixel
- Driver: ILI9341 (via SPI)
- Touch: XPT2046 (via SPI)
andere Schnittstellen
- SD card (via SPI)
- Speaker port
- UART, I2C
- 1x RGB LED
je nach Modell:
- USB-C oder/und Micro-USB port
CircuitPython: nur 9.2.9 oder 10.0.3 (crash loop mit 10.1.4 !!)
- Installation
- leider kein CIRCUITPY drive

Anwendungen ¶

Multi-purpose IOT
Applikationen mit displayio Grafik und LCD
- z.B. Dubbeglas-Uhr, Wort-Uhr, Domino-Uhr, Turtle-Grafik
Crypto-Miner

‘Blinky’ ¶

Maker Go `ESP32C3 Super Mini` ¶

verschiedene Hersteller
- Amazon: 3,50 - 4,00 €
ESP32-C3 (mit 2.4GHz Wifi und BLE 5)
- 32-bit RISC-V single core cpu (ULP)
- Memory: 4MB flash
sehr kleine Platine
- USB-C port
- 2x 8 IO-Pins
multiple IO protocols
- I2C, SPI, UART, …
- 1x LED
CircuitPython: 10.1.4
- Installation
- leider kein CIRCUITPY drive
Addon:
- NeoPixel-Streifen mit 8x WS2812

Schaltpläne ¶

Plan-1 oder Plan-2 oder Plan-3
Pin-Plan

Anwendungen ¶

Controller für 16x16 NeoPixel-Matrix, z.B Domino-Uhr
sehr billiger IOT Blinker (5€)
Ersatz für ESP8266
Ultra-Low-Power Coprozessor

Multi purpose ‘IOT’ ¶

Maker Go `ESP32C6 Super Mini` ¶

verschiedene Hersteller
- Amazon: 5 - 6 €
ESP32-C6 (mit 2.4GHz Wifi 6 und BLE 5)
- 32-bit RISC-V dual core cpu (normal & ULP)
- Memory: 4MB flash
sehr kleine Platine
- USB-C port
- 2x 10 IO-Pins
multiple IO protocols
- I2C, SPI, UART, …
- 1x NeoPixel
- Zigbee, Thread
CircuitPython: 10.1.4
- Installation
- leider kein CIRCUITPY drive

Schaltpläne ¶

Anwendungen ¶

Heimautomation (wg. der Protokoll-Vielfalt)
Low-Power Coprozessor
Network-Offloader für diverse Controller-Boards
- Waveshare ESP32-P4 boards
- Adafruit Airlift WiFi Co-Processor

‘Espressif ESP32-S3’ ¶

Espressif `ESP32-S3-DevKitC-1` ¶

verschiedene Hersteller
- Amazon: 7 - 10 €
ESP32-S3 (mit 2.4GHz Wifi und Bluetooth)
- 32-Bit Tensilica dual core cpu
- Memory: 16MB Flash, 8MB SPIRAM
andere Schnittstellen (44 pins)
- SPI, I2C, UART
- analog / digital IO pins
- 1x RGB LED
- 2x USB-C ports: COM + USB
CircuitPython: 10.1.4 (oder 10.0.3)
- Installation Original oder Clone
- mit CIRCUITPY drive

Anwendungen ¶

Multi-purpose IOT
Applikationen mit displayio und RGB-Matrix
- z.B. Dubbeglas-Uhr, Wort-Uhr, Domino-Uhr, Turtle-Grafik
Alternative zu den Raspberry-Pi-Micro-Controllern: Pico-W oder Pico2-W
ESP32-S3 werden auch in diversen LoRa-Controllern verwendet

Beispiele in CircuitPython 10 ¶

Wichtig: Für Boards ohne das “CIRCUITPY” flash drive muss der THONNY-Editor zum Up-/Download von Dateien zum Board verwendet werden!

Hilfestellung: Python Cheat-Sheet

‘Blinky’ für ESP32-C3 ¶

 1# SPDX-FileCopyrightText: 2026 Pagong
 2# SPDX-License-Identifier: MIT
 3
 4"""
 5Blink example for ESP32-C3 "Super Mini" board with 8 NeoPixel LEDs at IO2.
 6(running CircuitPython 10.1.4 firmware)
 7Requires some libraries from the Adafruit CircuitPython Library Bundle.
 8"""
 9
10import time
11import board
12import neopixel
13from rainbowio import colorwheel
14
15######
16
17NUM_PIXELS = 8     # Update this to match the number of LEDs.
18SPEED = 0.2        # Increase to slow down the effect. Decrease to speed it up.
19BRIGHTNESS = 0.2   # A number between 0.0 and 1.0, where 0.0 is off, and 1.0 is max.
20AUTO_WR = False
21
22PIN = board.IO2    # This is my neopixel pin on the ESP32-C3 SuperMini
23pixels = neopixel.NeoPixel(PIN, NUM_PIXELS, brightness=BRIGHTNESS, auto_write=AUTO_WR)
24
25######
26
27while True:
28    for i in range(256//8):
29        for j in range(8):
30            pixels[j] = colorwheel(8*i + j)
31        pixels.show()
32        time.sleep(SLEEP)

‘Taster’ für ESP32-C3 ¶

 1# SPDX-FileCopyrightText: 2026 Pagong
 2# SPDX-License-Identifier: MIT
 3
 4"""
 5Here's an example which toggles the on-board LED.
 6
 7This is for the ESP32-C3 board (with CircuitPython 10.1.4 firmware)
 8"""
 9
10import time
11import board
12
13from digitalio import DigitalInOut, Direction, Pull
14
15usrbtn = DigitalInOut(board.BUTTON)
16usrbtn.direction = Direction.INPUT
17usrbtn.pull = Pull.UP
18
19led = DigitalInOut(board.LED)
20led.direction = Direction.OUTPUT
21led.value = True
22
23state = 1
24while True:
25    button = usrbtn.value
26    if button:
27        state = state ^ 1
28        if not state:
29            led.value = False
30            print("LED is on")
31        else:
32            led.value = True
33            print("LED is off")
34
35    # debounce
36    while usrbtn.value:
37        time.sleep(0.1)
38    time.sleep(0.1)

‘Taster’ für ESP32-C6 ¶

 1# SPDX-FileCopyrightText: 2026 Pagong
 2# SPDX-License-Identifier: MIT
 3
 4"""
 5Button and blink example for my ESP32-C6 "Super Mini" board (running CircuitPython 10.1.4 firmware)
 6Uses Debouncer library to debounce the BOOT button and the onboard NeoPixel to show the state.
 7
 8Requires some libraries from the Adafruit CircuitPython Library Bundle:
 9        adafruit_ticks, adafruit_debouncer and neopixel
10"""
11
12import time
13import board
14import neopixel
15
16pixels = neopixel.NeoPixel(board.NEOPIXEL, 1)
17
18from digitalio import DigitalInOut, Direction, Pull
19from adafruit_debouncer import Debouncer
20
21usrbtn = DigitalInOut(board.BOOT)
22usrbtn.direction = Direction.INPUT
23usrbtn.pull = Pull.UP
24switch = Debouncer(usrbtn)
25
26######
27
28def blink():
29    pixels.fill((255, 0, 0))    # red
30    time.sleep(0.9)
31    pixels.fill((0, 0, 0))      # off
32    time.sleep(0.5)
33    pixels.fill((0, 255, 0))    # green
34    time.sleep(0.5)
35    pixels.fill((0, 0, 0))      # off
36    time.sleep(0.5)
37    pixels.fill((0, 0, 255))    # blue
38    time.sleep(0.2)
39    pixels.fill((0, 0, 0))      # off
40    time.sleep(0.5)
41
42######
43
44state = 1
45while True:
46    switch.update()
47    if switch.fell:
48        state = state ^ 1
49    if state:
50        blink()

VCC-GND ‘YD-ESP32-S3’ als `ESP32-S3-DevKitC-1` auf SeenGreat RGB Matrix Adapter ¶

Ansteuerung des SeenGreat RGB Matrix Adapters in CPy10.
(enthält auch Code für das ähnliche Board Matrix-Portal-S3 von Adafruit)

# Select "Adafruit" or "SeenGreat" for RGB Matrix Adapter
# - Code for Adafruit Matrix Portal S3
# - Code for SeenGreat RGB Matrix Adapter for ESP32-S3-DevKitC-1-N16 (without PSRAM !!)
...

import displayio
import framebufferio
import rgbmatrix

# define some global constants
from micropython import const
Scale = const(1)
H = const(64)
W = const(64)
L = const(64)

######

# Release any resources currently in use for the displays
displayio.release_displays()

RGB_TYPE = "SeenGreat"
#RGB_TYPE = "Adafruit"

def seengreat_rgb():
    # Code for ESP32-S3-DevKitC-1 on SeenGreat RGB Matrix Adapter Board
    return rgbmatrix.RGBMatrix(
        width=W, height=H, bit_depth=3,
        rgb_pins=[
            board.IO37,   # R1
            board.IO6,    # G1
            board.IO36,   # B1
            board.IO35,   # R2
            board.IO5,    # G2
            board.IO0,    # B2
        ],
        addr_pins=[
            board.IO45,  # Addr-A
            board.IO1,   # Addr-B
            board.IO48,  # Addr-C
            board.IO2,   # Addr-D
            board.IO4,   # Addr-E
        ],
        clock_pin=board.IO47,
        latch_pin=board.IO38,
        output_enable_pin=board.IO21
    )

def adafruit_rgb():
    # Code for ESP32-S3 on Adafruit Matrix Portal S3
    return rgbmatrix.RGBMatrix(
        width=W, height=H, bit_depth=3,
        rgb_pins=[
            board.MTX_R1,
            board.MTX_G1,
            board.MTX_B1,
            board.MTX_R2,
            board.MTX_G2,
            board.MTX_B2
        ],
        addr_pins=[
            board.MTX_ADDRA,
            board.MTX_ADDRB,
            board.MTX_ADDRC,
            board.MTX_ADDRD,
            board.MTX_ADDRE
        ],
        clock_pin=board.MTX_CLK,
        latch_pin=board.MTX_LAT,
        output_enable_pin=board.MTX_OE
    )

if RGB_TYPE == "SeenGreat":
    MATRIX = seengreat_rgb()
elif RGB_TYPE == "Adafruit":
    MATRIX = adafruit_rgb()
else:
    raise NameError(RGB_TYPE)

DISPLAY = framebufferio.FramebufferDisplay(MATRIX, auto_refresh=False)

######

...

Tipp ¶

Achtung: Kollision der IO-Pins 45-48 des Adapters mit dem SPI Port des onboard 8MB PSRAM!

Deshalb Verzicht auf die Nutzung des PSRAM und Installation von CPy10
für das Board von Espressif und nicht für das VCC-GND Board.

Backlinks

index Friday 17 April 2026

Was taugen billige Micro-Controller? ¶

‘Cheap-Yellow-Display’ ¶

Sunton ESP32-2432S028 ¶

Anwendungen ¶

‘Blinky’ ¶

Maker Go ESP32C3 Super Mini ¶

Schaltpläne ¶

Anwendungen ¶

Multi purpose ‘IOT’ ¶

Maker Go ESP32C6 Super Mini ¶

Schaltpläne ¶

Anwendungen ¶

‘Espressif ESP32-S3’ ¶

Espressif ESP32-S3-DevKitC-1 ¶

Anwendungen ¶

Beispiele in CircuitPython 10 ¶

‘Blinky’ für ESP32-C3 ¶

‘Taster’ für ESP32-C3 ¶

‘Taster’ für ESP32-C6 ¶

VCC-GND ‘YD-ESP32-S3’ als ESP32-S3-DevKitC-1 auf SeenGreat RGB Matrix Adapter ¶

Tipp ¶

Backlinks

Sunton `ESP32-2432S028` ¶

Maker Go `ESP32C3 Super Mini` ¶

Maker Go `ESP32C6 Super Mini` ¶

Espressif `ESP32-S3-DevKitC-1` ¶

VCC-GND ‘YD-ESP32-S3’ als `ESP32-S3-DevKitC-1` auf SeenGreat RGB Matrix Adapter ¶