Weather Station

Tywais

Jun 27th, 2025 (edited)

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/*
ADDED BLYNK - GOOD JUNE 26,2025
*/
#define BLYNK_TEMPLATE_ID "xxxxxxxxxxx"
#define BLYNK_TEMPLATE_NAME "Weather"
#define BLYNK_AUTH_TOKEN "xxxxxxxxxxxxxx"
char ssid[] = "xxxxxxxxxx";
char pass[] = "xxxxxxxxxx";
char auth[] = BLYNK_AUTH_TOKEN;
#include <Adafruit_GFX.h>
#include <Adafruit_ST7735.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h> //IMPORTANT TO USE ESP32 VERSION
#include <Adafruit_ADS1X15.h>
Adafruit_ADS1115 ads;
BlynkTimer timer;
#define BLYNK_PRINT Serial
#include <Fonts/Seven_Segment8pt7b.h>
// TFT pin configuration
#define TFT_CS 5
#define TFT_RST 3
#define TFT_DC 4
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
#define SCK_PIN 20
#define MOSI_PIN 19
#define MISO_PIN 18
// I2C pins for ESP32-C6
#define I2C_SDA 22
#define I2C_SCL 21
const int ADS_I2C_ADDR = 0x48;
// BME280 I2C
#define SEALEVELPRESSURE_HPA (1013.25)
Adafruit_BME280 bme; // I2C interface
int sda = 22; //I2C
int scl = 21;
// Label colors
#define ST77XX_GOLD 0xF631 //custom color
uint16_t colors[] = {
ST77XX_YELLOW, // Temperature
ST77XX_GREEN, // Humidity
ST77XX_CYAN, // Heat Index
ST77XX_GOLD // Pressure
};
// Label names
const char* smallLabels[] = { "Temperature", "Humidity", "Heat Index", "Pressure" };
// Values to be displayed
String values[4];
float temp;
float humid;
float pressure;
float hi;
float voltage;
void setup() {
Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
timer.setInterval(1000L, sendSensor);
SPI.begin(SCK_PIN, MISO_PIN, MOSI_PIN, SCK_PIN); //Initialize SPI manually for custom pins
Wire.begin(sda, scl); // Initialize I2C manually (optional for custom pins)
Serial.begin(115200);
ads.begin(ADS_I2C_ADDR);
ads.setGain(GAIN_TWOTHIRDS); // Gain = 0 => ±6.144V range (default)
ads.setDataRate(RATE_ADS1115_32SPS);
// Initialize BME280 over I2C
if (!bme.begin(0x76, &Wire)) {
Serial.println("Could not find BME280 sensor!");
while (1);
}
// Initialize TFT
tft.initR(INITR_GREENTAB);
tft.setRotation(0);
tft.fillScreen(ST77XX_BLACK);
}
void loop() {
Blynk.run();
timer.run();
// Read BME280 values
temp = bme.readTemperature();
humid = bme.readHumidity();
pressure = bme.readPressure() / 100.0; // hPa
// Calculate Heat Index in Celsius
hi = computeHeatIndex(temp, humid, false);
// Store values as strings
values[0] = String(temp, 1) + "C";
values[1] = String(humid, 1) + "%";
values[2] = String(hi, 1) + "C";
values[3] = String(pressure, 1) + "hPa";
// Update display
tft.fillScreen(ST77XX_BLACK);
drawLabels();
delay(1000);
}
void drawLabels() {
int boxWidth = 100;
int boxHeight = 32;
int radius = 4;
int spacingY = 8;
int startX = (tft.width() - boxWidth) / 2;
for (int i = 0; i < 4; i++) {
int y = i * (boxHeight + spacingY) + 5;
// Draw box
tft.drawRoundRect(startX, y, boxWidth, boxHeight, radius, colors[i]);
// Big label (value)
tft.setFont(&Seven_Segment8pt7b);
tft.setTextColor(colors[i]);
int16_t x1, y1;
uint16_t w, h;
tft.getTextBounds(values[i], 0, 0, &x1, &y1, &w, &h);
int textX = startX + (boxWidth - w) / 2;
int textY = y + 14;
tft.setCursor(textX, textY);
tft.print(values[i]);
// Small label (description)
tft.setFont();
tft.setTextColor(ST77XX_WHITE);
tft.setTextSize(1);
tft.getTextBounds(smallLabels[i], 0, 0, &x1, &y1, &w, &h);
textX = startX + (boxWidth - w) / 2;
textY = y + boxHeight - h - 2;
tft.setCursor(textX, textY);
tft.print(smallLabels[i]);
}
}
// Heat Index Calculation
float computeHeatIndex(float temperature, float humidity, bool isFahrenheit) {
if (!isFahrenheit) {
temperature = temperature * 1.8 + 32;
}
hi = -42.379 +
2.04901523 * temperature +
10.14333127 * humidity +
-0.22475541 * temperature * humidity +
-0.00683783 * temperature * temperature +
-0.05481717 * humidity * humidity +
0.00122874 * temperature * temperature * humidity +
0.00085282 * temperature * humidity * humidity +
-0.00000199 * temperature * temperature * humidity * humidity;
if ((humidity < 13) && (temperature >= 80.0) && (temperature <= 112.0)) {
hi -= ((13.0 - humidity) * 0.25) *
sqrt((17.0 - abs(temperature - 95.0)) * 0.05882);
} else if ((humidity > 85.0) && (temperature >= 80.0) && (temperature <= 87.0)) {
hi += ((humidity - 85.0) * 0.1) *
((87.0 - temperature) * 0.2);
}
if (!isFahrenheit) {
hi = (hi - 32) * 0.5556;
}
return hi;
}
void sendSensor()
{
readADC();
Blynk.virtualWrite(V0, temp);
Blynk.virtualWrite(V1, humid);
Blynk.virtualWrite(V2, hi);
Blynk.virtualWrite(V3, pressure);
Blynk.virtualWrite(V4,voltage);
}
void readADC() {
int16_t raw = ads.readADC_SingleEnded(0);
voltage = raw *0.0001875; //6.144/2^15 = 0.1875mV per bit
}

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