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The Iron

I’ve added “The Iron” by Henry Rollins to archive.

Reverse geolocation lookup

Ich habe mal den Quellcode für Reverse Geolocation Lookup per Nominatim, den ich für Freifunk-Knoten genutzt habe, von dem Rest getrennt und unter gepackt.

Ulanzi TC001 Hello World

Compatible board in Arduino: NodeMCU-32S


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 WS2812_PIN 32

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

void setup() {  
  pinMode(15, OUTPUT);
  digitalWrite(15, 0);

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

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