Solar weather station

Install first: Adafruit BME280 Library, Adafruit Unified Sensor

#include <WiFi.h>
#include <WebServer.h>
#include <Wire.h>
#include <Adafruit_BME280.h>

const char* WIFI_NAME = "your-wifi";
const char* WIFI_PASS = "your-password";
const int RAIN_PIN = 25, WIND_PIN = 26;
const float MM_PER_TIP = 0.2794, KMH_PER_HZ = 2.4;

Adafruit_BME280 bme;
WebServer server(80);
volatile unsigned long rainTips = 0, windClicks = 0, lastRain = 0, lastWind = 0;
float tempC, rh, hPa, windKmh, rainTodayMm;

void IRAM_ATTR onRain() { if (millis() - lastRain > 150) { rainTips++; lastRain = millis(); } }
void IRAM_ATTR onWind() { if (millis() - lastWind > 10) { windClicks++; lastWind = millis(); } }

void handleRoot() {
  char html[400];
  snprintf(html, sizeof html,
    "<meta name=viewport content='width=device-width'><h2>Weather</h2>"
    "<p>%.1f &deg;C &middot; %.0f%% RH &middot; %.0f hPa</p><p>Wind %.1f km/h</p><p>Rain today %.1f mm</p>",
    tempC, rh, hPa, windKmh, rainTodayMm);
  server.send(200, "text/html", html);
}

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);
  bme.begin(0x76);
  bme.setSampling(Adafruit_BME280::MODE_FORCED);   // sleep between reads
  pinMode(RAIN_PIN, INPUT_PULLUP); pinMode(WIND_PIN, INPUT_PULLUP);
  attachInterrupt(RAIN_PIN, onRain, FALLING);
  attachInterrupt(WIND_PIN, onWind, FALLING);
  WiFi.begin(WIFI_NAME, WIFI_PASS);
  WiFi.setSleep(true);                              // modem sleep saves battery
  while (WiFi.status() != WL_CONNECTED) delay(250);
  Serial.println(WiFi.localIP());
  server.on("/", handleRoot); server.begin();
}

void loop() {
  server.handleClient();
  static unsigned long windStart = millis();
  if (millis() - windStart >= 5000) {               // 5-second wind average
    noInterrupts(); unsigned long clicks = windClicks; windClicks = 0; interrupts();
    windKmh = clicks / 5.0 * KMH_PER_HZ;
    windStart = millis();
    bme.takeForcedMeasurement();
    tempC = bme.readTemperature(); rh = bme.readHumidity(); hPa = bme.readPressure() / 100.0;
    rainTodayMm = rainTips * MM_PER_TIP;
  }
  delay(10);
}