sensor.ino

   
#include <Adafruit_NeoPixel.h>
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include <ESP8266mDNS.h>
#include <ArduinoJson.h>

#define SEALEVELPRESSURE_HPA (1013.25)
#define PIN D5
#define N_LEDS 16
#define MDNS_HOSTNAME "lightsensor"

struct RGBSetup {
  byte r;
  byte g;
  byte b;
  byte mode;
};

Adafruit_BME280 bme;

float temperature, humidity, pressure, altitude;

const char* ssid = "";  // Enter SSID here
const char* password = "";  //Enter Password here

ESP8266WebServer server(80);      
Adafruit_NeoPixel strip = Adafruit_NeoPixel(N_LEDS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
 
  pinMode(D4, OUTPUT);
  digitalWrite(D4, HIGH);
  strip.begin();
  
  Serial.begin(115200);
  delay(100);
  
  bme.begin(0x76);   
    
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
  }
  Serial.print("Got IP: ");
  Serial.println(WiFi.localIP());

  while (!MDNS.begin(MDNS_HOSTNAME)) {
      delay(1000);          
   }

  StaticJsonBuffer<200> jsonBuffer;
     
  server.on("/metrics", HTTP_GET, handle_PromMetrics);
  server.on("/api", HTTP_GET, handle_getLed);
  server.on("/api", HTTP_POST, handle_setLed);
  server.onNotFound(handle_NotFound);
  
  server.begin();
  
}
     
void loop() {
 server.handleClient();

 chase(strip.Color(255, 0, 0)); // Red
 chase(strip.Color(0, 255, 0)); // Green
 chase(strip.Color(0, 0, 255)); // Blue
}

static void chase(uint32_t c) {
  for(uint16_t i=0; i<strip.numPixels()+4; i++) {
      strip.setPixelColor(i  , c); // Draw new pixel
      strip.setPixelColor(i-4, 0); // Erase pixel a few steps back
      strip.show();
      delay(25);
  }
}

void handle_PromMetrics() {
  temperature = bme.readTemperature();
  humidity = bme.readHumidity();
  pressure = bme.readPressure() / 100.0F;
  altitude = bme.readAltitude(SEALEVELPRESSURE_HPA);
  server.send(200, "text/plain", PromMetrics(temperature,humidity,pressure,altitude)); 
}

void handle_getLed() {
  server.send(200, "text/plain", "not_implemented"); 

}

void handle_setLed() {
  /*JsonObject& root = jsonBuffer.parseObject(json);
  
  if (!root.success()) {
    server.send(500, "text/plain", "ParseObject() Failed"); 
    return;
  }
  */
  //const char* sensor = root["sensor"];
  //long time = root["time"];
  //double latitude = root["data"][0];
  //double longitude = root["data"][1];
  
}


void handle_NotFound(){
  server.send(404, "text/plain", "Not found");
}

String addMetric(String input, String name, float val){
  input += MDNS_HOSTNAME;
  input += "_" + name + " ";
  input += val;
  input += "\n";
  return input;
}

String PromMetrics(float temperature,float humidity,float pressure,float altitude){
  String ptr = "";
  ptr = addMetric(ptr,"temperature", temperature);
  ptr = addMetric(ptr,"humidity_pcnt", humidity);
  ptr = addMetric(ptr,"pressure", pressure);
  ptr = addMetric(ptr,"altitude_meters", altitude);
  ptr = addMetric(ptr,"heap_free_bytes", ESP.getFreeHeap());
  ptr = addMetric(ptr,"heap_fragmentation_pcnt", ESP.getHeapFragmentation());
  ptr = addMetric(ptr,"heap_max_block_bytes", ESP.getMaxFreeBlockSize());
  return ptr;
}