spacepanel/show_leds/show_leds.ino

#include <ArduinoJson.h>
#include <Adafruit_NeoPixel.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>


#define OWN_PIN        28
#define FREE_CYCLES    10
#define PIN            2
#define NUMPIXELS      58
const char* ssid = "CTDO-LEGACY";
const char* password = "****";
const char* apiEndpoint = "http://spacepanel-aggregator-ingress.ctdo-spacepanel.195.160.168.3.nip.io/leds";
const int pollInterval = 10000;
HTTPClient http;


Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_RGB + NEO_KHZ800);

int delayval = 500;
int freecycles = 0;

void setLED(int i, String value) {
  String value_short = value.substring(1);
      char charbuf[8];
      value_short.toCharArray(charbuf,8);
      long int rgb = strtol(charbuf,0,16); //=>rgb=0x001234FE;
      byte r=(byte)(rgb>>16);
      byte g=(byte)(rgb>>8);
      byte b=(byte)(rgb);

      Serial.print(value_short);
      Serial.print("-> ");
      Serial.print(r);
      Serial.print(", ");
      Serial.print(g);
      Serial.print(", ");
      Serial.println(b);
      pixels.setPixelColor(i, pixels.Color(r/25,g/25,b/25));
}

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  Serial.println(WiFi.macAddress());
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("Connected.");
 
  pixels.begin();
}

void loop() {
  Serial.println("Sending request...");
  http.begin(apiEndpoint);
  int httpCode = http.GET();
  Serial.println("Success.");
  if (httpCode == 200) {
    String json = http.getString();
    const size_t capacity = JSON_ARRAY_SIZE(NUMPIXELS) + 510;
    DynamicJsonDocument doc(capacity);
    deserializeJson(doc, json);
    for (int i = 0; i < NUMPIXELS; i++) {
      if (i == OWN_PIN && freecycles < FREE_CYCLES) {
        setLED(i, "#00ff00");
      }
      else {
        Serial.print("LED" + String(i) + ": ");
        const char* element = doc[i];
        String value = String(element);
        setLED(i, value); 
        Serial.print("LED" );
        Serial.print(i);
        Serial.print("Color: ");
        Serial.println(value);
      }
      
    }
     pixels.show();
     freecycles++;
  } else {
    Serial.println("Error: Statuscode" + httpCode);
  }
  delay(pollInterval);
 }