blog: Ulanzi TC001 Hello World

Compatible board in Arduino: NodeMCU-32S

Pinout

Pin (GPIO)	Function
14	Button 3
15	Buzzer
21	I2C SDA
22	I2C SCL
26	Button 1
27	Button 2
32	WS2812 Pin 1
34	ADC In (Battery)
35	ADC Illuminance

8x32 LEDs

The rows are connected with alternating base indices (i.e. row 0 starts at 0 and ends at 31, row 1 starts 63 and ends at 32) - in serpentine fashion, if you like.

Hello World

Shifting one red pixel through the LED matrix.

You need the NeoPixelBus library by Makuna (installable inside the Arduino IDE).

#include <NeoPixelBus.h>

#define ROWS 8
#define COLS 32
#define NUM_PIXELS (ROWS*COLS)
#define WS2812_PIN 32

NeoPixelBus<NeoGrbFeature, NeoWs2812xMethod> ulanzi(NUM_PIXELS, WS2812_PIN);
RgbColor red(255,0,0);
RgbColor black(0,0,0);

void setup() {  
  ulanzi.Begin();
  pinMode(15, OUTPUT);
  digitalWrite(15, 0);
}

void loop() {
  int i = 255;
  while (true) {
    ulanzi.SetPixelColor(i, black);
    ulanzi.SetPixelColor((i+1)%256, red);
    ulanzi.Show();
    i++;
    i = i % 256;
  }
}