Weather Station with BME280 and Wind Speed and Direction Sensors.

This Arduino project is a fully functional weather station that measures temperature, humidity, air pressure, wind speed, and wind direction. It also records high and low values for temperature and pressure over the past 24 hours. Two 20x4 LCD screens are used: one for temperature, humidity, and pressure, and the other for wind speed and wind direction.

Sep 10, 2025

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16300 views

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17 respects

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Data Collection

Tracking

Weather

Environmental Sensing

Components and supplies

Arduino Uno Rev3

Breadboard - 840 contacts

40 colored male-female jumper wires

ZTS-3000-FSJT Wind Speed Sensor

BME280/BMP280

10kOhm potentiometer

PR-3000-FXJT Wind Direction Sensor

20x4 LCD

12V adapter

Apps and platforms

Arduino IDE

Project description

Code

Whether Stations

cpp

1#include <LiquidCrystal.h>  // for LCD
2#include <Wire.h>
3#include <Adafruit_Sensor.h>
4#include <Adafruit_BME280.h>
5#include <string.h>
6
7// Temperature sensor LCD pins
8#define LCD_RS_PIN 2 
9#define LCD_E_PIN  3
10#define LCD_D4_PIN 4 
11#define LCD_D5_PIN 6  
12#define LCD_D6_PIN 7 
13#define LCD_D7_PIN 8 
14
15// Wind data LCD pins
16#define LCD_RS_PIN_wind 13
17#define LCD_E_PIN_wind 11
18#define LCD_D4_PIN_wind 12 
19#define LCD_D5_PIN_wind 10 
20#define LCD_D6_PIN_wind 9
21#define LCD_D7_PIN_wind A3
22
23// Wind sensors pins
24#define windPin A0  
25#define dirPin  A1  
26
27
28unsigned long previous_time_temp_check = 0;
29unsigned long previous_time_wind_check = 0;
30
31
32unsigned int temp_array_count = 0;
33char temp_array[96];
34
35unsigned int pres_array_count = 0;
36int pres_array[96];
37
38unsigned int wind_speed_array_count = 0;
39char wind_speed_array[300];
40
41unsigned int wind_direction_array_count = 0;
42int wind_direction_array[60];
43
44// This is the amount that we will subtract from the voltage
45float voltage_offset = 0.14;
46
47
48// Create BME280 object for I2C
49Adafruit_BME280 bme;
50
51// Create LCD object
52LiquidCrystal lcd(LCD_RS_PIN, LCD_E_PIN, LCD_D4_PIN, LCD_D5_PIN, LCD_D6_PIN, LCD_D7_PIN);
53LiquidCrystal lcd_wind(LCD_RS_PIN_wind, LCD_E_PIN_wind, LCD_D4_PIN_wind, LCD_D5_PIN_wind, LCD_D6_PIN_wind, LCD_D7_PIN_wind);
54
55
56
57void setup() {
58  Serial.begin(9600);
59
60  lcd.begin(20, 4);  
61  lcd_wind.begin(20, 4);  
62 
63
64  Serial.println(F("BME280 I2C Test"));
65
66// Filling the array with values that are less than what could be in the temp. 
67// This is so when the computer calculates the high and low it won’t use garbage 
68// values that are automatically put into the array. That’s why I used -100.
69  for(int i = 0; i < 96; i++){
70    temp_array[i] = -50;
71  }
72
73  // same as for the temp array
74  for(int i = 0; i < 96; i++){
75    pres_array[i] = 100;
76  }
77
78  for(int i = 0; i < 300; i++){
79    wind_speed_array[i] = 0;
80  }
81
82  // test to initialize the sensor
83  if (!bme.begin(0x76)) { // Use 0x76 (most modules) or 0x77 if needed
84    Serial.println(F("Could not find a valid BME280 sensor, check wiring!"));
85    while (1); // Stop here
86  }
87
88  // initial setup
89  lcd.setCursor(0, 0);
90  lcd.print(F("The temperature will show in 30 seconds"));
91  delay(30000); // to let the sensor stabilize before reading
92//----------------------------------------------------------------------------------------------------------------------
93  int temp = bme.readTemperature();
94  lcd.setCursor(0, 0);
95  lcd.print(F("                    "));
96  lcd.setCursor(0, 0);
97  lcd.print(F("Temp = "));  
98  lcd.print(temp);
99  lcd.print((char)223);
100//--------------------------------------------------------------------------------------------------------------------------
101  float stationPressure = bme.readPressure() / 100.0; // BME280 gives Pa, convert to hPa
102  int altitude = 410; // meters
103  // I'm using int because I don't want the decimal place.
104  unsigned int seaLevelPressure = stationPressure * pow((1 - (altitude / 44330.0)), -5.255);
105  lcd.setCursor(0, 1);
106  lcd.print(F("                    "));
107  lcd.setCursor(0, 1); 
108  lcd.print(F("Pres = "));  
109  lcd.print(seaLevelPressure);  
110  lcd.print(F(" hPa"));
111
112//-------------------------------------------------------------------------------------------------------------------------
113
114  unsigned int humidity = bme.readHumidity();
115  lcd.setCursor(0, 2);
116  lcd.print(F("                    "));
117  lcd.setCursor(0, 2); 
118  lcd.print(F("Humidity = "));  
119  lcd.print(humidity);  
120  lcd.print(F("%")); 
121
122}
123
124void loop() {
125  unsigned long time_now = millis(); // Get the current time
126
127  if(time_now - previous_time_wind_check > 1000){
128    
129    // ===== Wind speed =====
130    int analog_from_speed = analogRead(windPin);         // 0–1023
131    float voltage_from_speed = analog_from_speed / 204.6 - voltage_offset; // 1023/5 ≈ 204.6 for each volt
132    // voltage_offset is an amount you want to subtract from the raw volts, because the sensor is not 0 when it is
133    // not moving and you want it to be 0. To fix that you use the offset.
134           
135    int wind_kmph = voltage_from_speed * 12 * 3.6; // 5V -> 60 m/s => 12 m/s per volt then * 3.6 -> km/h
136
137    // Puts the wind speed value in the right array slot
138    int array_wind_place = wind_speed_array_count % 300;
139    wind_speed_array[array_wind_place] = wind_kmph;
140    wind_speed_array_count++;
141
142    // // this is only for testing the array place
143    // Serial.println("array place wind");
144    // Serial.println(array_wind_place);
145
146    // This will only be accurate 5 minutes after start    
147    
148    int wind_average = 0;
149
150    for(int i = 0; i < 300; i++){
151      wind_average += wind_speed_array[i];
152    } 
153    wind_average /= 300;
154
155    // //for testing
156    // Serial.println("wind average");
157    // Serial.println(wind_average);
158
159    if(wind_kmph < 5){
160      lcd_wind.setCursor(0, 0);
161      lcd_wind.print(F("                    "));
162      lcd_wind.setCursor(0, 0);
163      lcd_wind.print(F("Wind is light")); 
164    }else{
165      lcd_wind.setCursor(0, 0);
166      lcd_wind.print(F("                    "));      
167      lcd_wind.setCursor(0, 0);
168      lcd_wind.print(F("Wind Speed: "));  
169      lcd_wind.print(wind_kmph);
170      lcd_wind.print(F("km"));
171    }
172      lcd_wind.setCursor(0, 1);
173      lcd_wind.print(F("                    "));      
174      lcd_wind.setCursor(0, 1);
175      lcd_wind.print(F("5M wind avg: "));  
176      lcd_wind.print(wind_average);
177      lcd_wind.print(F("km"));
178
179      lcd_wind.setCursor(0, 3);
180      lcd_wind.print(F("V:")); 
181      lcd_wind.print(voltage_from_speed, 2); 
182
183
184    // Print results on serial for testing
185    // Serial.print("Raw ADC: ");
186    // Serial.print(rawSpeed);
187    // Serial.print(" | Voltage: ");
188    // Serial.print(voltSpeed, 2);
189    //Serial.print(F("Wind Speed: "));
190    // Serial.print(windMs, 2);
191    // Serial.print(" m/s (");
192    //Serial.print(wind_kmph);
193    //Serial.print(F(" km/h)"));
194
195
196    // ===== Wind direction =====
197    int analog_from_direction = analogRead(dirPin);            // 0–1023
198    float volts_from_direction = analog_from_direction / 204.6;           
199    int wind_direction = (volts_from_direction / 5.0) * 360.0;    
200
201    int North = 0;
202    int Northeast = 0;
203    int East = 0;
204    int Southeast = 0;
205    int South = 0;
206    int Southwest = 0;
207    int West = 0;
208    int Northwest = 0;
209
210    int array_place_direction = wind_direction_array_count % 60;
211    wind_direction_array[array_place_direction] = wind_direction;
212    wind_direction_array_count++;
213
214    for(int i = 0; i < 60; i++){
215      int test = wind_direction_array[i];
216      if(test > 341){
217        North++;
218      }
219      else if(test < 30){
220        Northeast++;
221      }
222      else if(test < 70){
223        East++;
224      }
225      else if(test < 130){
226        Southeast++;
227      }
228      else if(test < 180){
229        South++;
230      }
231      else if(test < 230){
232        Southwest++;
233      }
234      else if(test < 280){
235        West++;
236      }
237      else if(test < 340){
238        Northwest++;
239      }
240    }
241
242char direction[3] = "--";   // 2 letters max + null terminator
243
244// Checking which is the biggest.
245if (North > Northeast && North > East && North > Southeast && North > South && North > Southwest && North > West && North > Northwest) {
246    strcpy(direction, "N");
247}
248else if (Northeast > North && Northeast > East && Northeast > Southeast && Northeast > South && Northeast > Southwest && Northeast > West && Northeast > Northwest) {
249    strcpy(direction, "NE");
250}
251else if (East > North && East > Northeast && East > Southeast && East > South && East > Southwest && East > West && East > Northwest) {
252    strcpy(direction, "E");
253}
254else if (Southeast > North && Southeast > Northeast && Southeast > East && Southeast > South && Southeast > Southwest && Southeast > West && Southeast > Northwest) {
255    strcpy(direction, "SE");
256}
257else if (South > North && South > Northeast && South > East && South > Southeast && South > Southwest && South > West && South > Northwest) {
258    strcpy(direction, "S");
259}
260else if (Southwest > North && Southwest > Northeast && Southwest > East && Southwest > Southeast && Southwest > South && Southwest > West && Southwest > Northwest) {
261    strcpy(direction, "SW");
262}
263else if (West > North && West > Northeast && West > East && West > Southeast && West > South && West > Southwest && West > Northwest) {
264    strcpy(direction, "W");
265}
266else if (Northwest > North && Northwest > Northeast && Northwest > East && Northwest > Southeast && Northwest > South && Northwest > Southwest && Northwest > West) {
267    strcpy(direction, "NW");
268}
269
270    lcd_wind.setCursor(0, 2);
271    lcd_wind.print(F("                    "));      
272    lcd_wind.setCursor(0, 2);
273    lcd_wind.print(F("wind direction: "));  
274    lcd_wind.print(direction);
275 
276  
277    // // This is just for testing
278    // Serial.print("  ||  Dir Raw: ");
279    // Serial.print(rawDir);
280    // Serial.print(" | Dir Volt: ");
281    // Serial.print(voltDir, 2);
282    // Serial.print(F("Wind Direction: "));
283    // Serial.print(wind_direction);
284    // Serial.println(F(" deg"));
285
286
287    previous_time_wind_check += 1000;
288  }
289  
290  
291  if (time_now - previous_time_temp_check > 900000){
292
293
294// ------------------------------------------------------------------------------------------------------------------------
295  int temp = bme.readTemperature();
296
297  lcd.setCursor(0, 0);
298  lcd.print(F("                    "));
299  lcd.setCursor(0, 0);
300  lcd.print(F("Temp = "));  
301  lcd.print(temp);  
302  lcd.print((char)223);
303
304  // // Testing to see that the count works in serial
305  // Serial.println(F("temp array count"));
306  // Serial.println(temp_array_count);
307
308  // places the temp value in the right array slot
309  int array_place = temp_array_count % 96;
310  temp_array[array_place] = temp;
311  temp_array_count++;
312
313  // // this is only for testing the array place
314  // Serial.println(F("array place temp"));
315  // Serial.println(array_place);
316 
317  // This whole chunk is for the high and low function
318  int high_temp = temp_array[0];
319  int low_temp = temp_array[0];
320
321  for(int i = 0; i < 96; i++){
322
323    if(temp_array[i] < low_temp && temp_array[i] != -50){
324      low_temp = temp_array[i];
325    }
326    else if(temp_array[i] > high_temp){
327      high_temp = temp_array[i];
328    }
329  }
330
331  lcd.setCursor(12, 0);
332  lcd.print(F("H"));  
333  lcd.print(high_temp); 
334  lcd.print(F(" L"));
335  lcd.print(low_temp);
336
337//--------------------------------------------------------------------------------------------------------------------------
338
339  // This gets the pressure and turns the station pressure into sea level pressure
340  float station_pressure = bme.readPressure() / 100.0; // BME280 gives Pa, convert to hPa
341  int altitude = 410; // meters
342  // I'm using int because I don't want the decimal place.
343  unsigned int sea_level_pressure = station_pressure * pow((1 - (altitude / 44330.0)), -5.255);
344
345  lcd.setCursor(0, 1); 
346  lcd.print(F("Pres = "));  
347  lcd.print(sea_level_pressure);  
348  lcd.print(F(" hPa")); 
349
350  // Array placement
351  unsigned char array_place_pres = pres_array_count % 96;
352  pres_array[array_place_pres] = sea_level_pressure;
353  pres_array_count++;
354
355  // // This is just for testing
356  // Serial.println(F("pressure array place"));
357  // Serial.println(pres_array_count);
358  // Serial.println(F("array place presser"));
359  // Serial.println(F("array place pressure"));
360 
361
362  unsigned int high_pres = pres_array[0];
363  unsigned int low_pres = pres_array[0];
364
365  for(int i = 0; i < 96; i++){
366    if(pres_array[i] < low_pres && pres_array[i] != 100){
367      low_pres = pres_array[i];
368    }
369    else if(pres_array[i] > high_pres){
370      high_pres = pres_array[i];
371    }
372  }
373
374  lcd.setCursor(0, 2);
375  lcd.print(F("                    "));
376  lcd.setCursor(0, 2); 
377  lcd.print(F("HP"));  
378  lcd.print(high_pres);  
379  lcd.print(F(" LP")); 
380  lcd.print(low_pres); 
381
382//------------------------------------------------------------------------------------------------------------------------
383  // humidity check
384  // the int is so there should be no decimal
385  int humidity = bme.readHumidity();
386  lcd.setCursor(0, 3); 
387  lcd.print(F("Humidity = "));  
388  lcd.print(humidity);  
389  lcd.print(F("%"));   
390
391// -----------------------------------------------------------------------------------------------------------------------
392  previous_time_temp_check += 900000;
393  }
394}
395
396  
397  // lcd.setCursor(0, 3); 
398  // lcd.print("Altitude = ");  
399  // lcd.print(bme.readAltitude(SEALEVELPRESSURE_HPA));  
400  // lcd.print(" m");

#include <LiquidCrystal.h>  // for LCD
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include <string.h>

// Temperature sensor LCD pins
#define LCD_RS_PIN 2 
#define LCD_E_PIN  3
#define LCD_D4_PIN 4 
#define LCD_D5_PIN 6  
#define LCD_D6_PIN 7 
#define LCD_D7_PIN 8 

// Wind data LCD pins
#define LCD_RS_PIN_wind 13
#define LCD_E_PIN_wind 11
#define LCD_D4_PIN_wind 12 
#define LCD_D5_PIN_wind 10 
#define LCD_D6_PIN_wind 9
#define LCD_D7_PIN_wind A3

// Wind sensors pins
#define windPin A0  
#define dirPin  A1  


unsigned long previous_time_temp_check = 0;
unsigned long previous_time_wind_check = 0;


unsigned int temp_array_count = 0;
char temp_array[96];

unsigned int pres_array_count = 0;
int pres_array[96];

unsigned int wind_speed_array_count = 0;
char wind_speed_array[300];

unsigned int wind_direction_array_count = 0;
int wind_direction_array[60];

// This is the amount that we will subtract from the voltage
float voltage_offset = 0.14;


// Create BME280 object for I2C
Adafruit_BME280 bme;

// Create LCD object
LiquidCrystal lcd(LCD_RS_PIN, LCD_E_PIN, LCD_D4_PIN, LCD_D5_PIN, LCD_D6_PIN, LCD_D7_PIN);
LiquidCrystal lcd_wind(LCD_RS_PIN_wind, LCD_E_PIN_wind, LCD_D4_PIN_wind, LCD_D5_PIN_wind, LCD_D6_PIN_wind, LCD_D7_PIN_wind);



void setup() {
  Serial.begin(9600);

  lcd.begin(20, 4);  
  lcd_wind.begin(20, 4);  
 

  Serial.println(F("BME280 I2C Test"));

// Filling the array with values that are less than what could be in the temp. 
// This is so when the computer calculates the high and low it won’t use garbage 
// values that are automatically put into the array. That’s why I used -100.
  for(int i = 0; i < 96; i++){
    temp_array[i] = -50;
  }

  // same as for the temp array
  for(int i = 0; i < 96; i++){
    pres_array[i] = 100;
  }

  for(int i = 0; i < 300; i++){
    wind_speed_array[i] = 0;
  }

  // test to initialize the sensor
  if (!bme.begin(0x76)) { // Use 0x76 (most modules) or 0x77 if needed
    Serial.println(F("Could not find a valid BME280 sensor, check wiring!"));
    while (1); // Stop here
  }

  // initial setup
  lcd.setCursor(0, 0);
  lcd.print(F("The temperature will show in 30 seconds"));
  delay(30000); // to let the sensor stabilize before reading
//----------------------------------------------------------------------------------------------------------------------
  int temp = bme.readTemperature();
  lcd.setCursor(0, 0);
  lcd.print(F("                    "));
  lcd.setCursor(0, 0);
  lcd.print(F("Temp = "));  
  lcd.print(temp);
  lcd.print((char)223);
//--------------------------------------------------------------------------------------------------------------------------
  float stationPressure = bme.readPressure() / 100.0; // BME280 gives Pa, convert to hPa
  int altitude = 410; // meters
  // I'm using int because I don't want the decimal place.
  unsigned int seaLevelPressure = stationPressure * pow((1 - (altitude / 44330.0)), -5.255);
  lcd.setCursor(0, 1);
  lcd.print(F("                    "));
  lcd.setCursor(0, 1); 
  lcd.print(F("Pres = "));  
  lcd.print(seaLevelPressure);  
  lcd.print(F(" hPa"));

//-------------------------------------------------------------------------------------------------------------------------

  unsigned int humidity = bme.readHumidity();
  lcd.setCursor(0, 2);
  lcd.print(F("                    "));
  lcd.setCursor(0, 2); 
  lcd.print(F("Humidity = "));  
  lcd.print(humidity);  
  lcd.print(F("%")); 

}

void loop() {
  unsigned long time_now = millis(); // Get the current time

  if(time_now - previous_time_wind_check > 1000){
    
    // ===== Wind speed =====
    int analog_from_speed = analogRead(windPin);         // 0–1023
    float voltage_from_speed = analog_from_speed / 204.6 - voltage_offset; // 1023/5 ≈ 204.6 for each volt
    // voltage_offset is an amount you want to subtract from the raw volts, because the sensor is not 0 when it is
    // not moving and you want it to be 0. To fix that you use the offset.
           
    int wind_kmph = voltage_from_speed * 12 * 3.6; // 5V -> 60 m/s => 12 m/s per volt then * 3.6 -> km/h

    // Puts the wind speed value in the right array slot
    int array_wind_place = wind_speed_array_count % 300;
    wind_speed_array[array_wind_place] = wind_kmph;
    wind_speed_array_count++;

    // // this is only for testing the array place
    // Serial.println("array place wind");
    // Serial.println(array_wind_place);

    // This will only be accurate 5 minutes after start    
    
    int wind_average = 0;

    for(int i = 0; i < 300; i++){
      wind_average += wind_speed_array[i];
    } 
    wind_average /= 300;

    // //for testing
    // Serial.println("wind average");
    // Serial.println(wind_average);

    if(wind_kmph < 5){
      lcd_wind.setCursor(0, 0);
      lcd_wind.print(F("                    "));
      lcd_wind.setCursor(0, 0);
      lcd_wind.print(F("Wind is light")); 
    }else{
      lcd_wind.setCursor(0, 0);
      lcd_wind.print(F("                    "));      
      lcd_wind.setCursor(0, 0);
      lcd_wind.print(F("Wind Speed: "));  
      lcd_wind.print(wind_kmph);
      lcd_wind.print(F("km"));
    }
      lcd_wind.setCursor(0, 1);
      lcd_wind.print(F("                    "));      
      lcd_wind.setCursor(0, 1);
      lcd_wind.print(F("5M wind avg: "));  
      lcd_wind.print(wind_average);
      lcd_wind.print(F("km"));

      lcd_wind.setCursor(0, 3);
      lcd_wind.print(F("V:")); 
      lcd_wind.print(voltage_from_speed, 2); 


    // Print results on serial for testing
    // Serial.print("Raw ADC: ");
    // Serial.print(rawSpeed);
    // Serial.print(" | Voltage: ");
    // Serial.print(voltSpeed, 2);
    //Serial.print(F("Wind Speed: "));
    // Serial.print(windMs, 2);
    // Serial.print(" m/s (");
    //Serial.print(wind_kmph);
    //Serial.print(F(" km/h)"));


    // ===== Wind direction =====
    int analog_from_direction = analogRead(dirPin);            // 0–1023
    float volts_from_direction = analog_from_direction / 204.6;           
    int wind_direction = (volts_from_direction / 5.0) * 360.0;    

    int North = 0;
    int Northeast = 0;
    int East = 0;
    int Southeast = 0;
    int South = 0;
    int Southwest = 0;
    int West = 0;
    int Northwest = 0;

    int array_place_direction = wind_direction_array_count % 60;
    wind_direction_array[array_place_direction] = wind_direction;
    wind_direction_array_count++;

    for(int i = 0; i < 60; i++){
      int test = wind_direction_array[i];
      if(test > 341){
        North++;
      }
      else if(test < 30){
        Northeast++;
      }
      else if(test < 70){
        East++;
      }
      else if(test < 130){
        Southeast++;
      }
      else if(test < 180){
        South++;
      }
      else if(test < 230){
        Southwest++;
      }
      else if(test < 280){
        West++;
      }
      else if(test < 340){
        Northwest++;
      }
    }

char direction[3] = "--";   // 2 letters max + null terminator

// Checking which is the biggest.
if (North > Northeast && North > East && North > Southeast && North > South && North > Southwest && North > West && North > Northwest) {
    strcpy(direction, "N");
}
else if (Northeast > North && Northeast > East && Northeast > Southeast && Northeast > South && Northeast > Southwest && Northeast > West && Northeast > Northwest) {
    strcpy(direction, "NE");
}
else if (East > North && East > Northeast && East > Southeast && East > South && East > Southwest && East > West && East > Northwest) {
    strcpy(direction, "E");
}
else if (Southeast > North && Southeast > Northeast && Southeast > East && Southeast > South && Southeast > Southwest && Southeast > West && Southeast > Northwest) {
    strcpy(direction, "SE");
}
else if (South > North && South > Northeast && South > East && South > Southeast && South > Southwest && South > West && South > Northwest) {
    strcpy(direction, "S");
}
else if (Southwest > North && Southwest > Northeast && Southwest > East && Southwest > Southeast && Southwest > South && Southwest > West && Southwest > Northwest) {
    strcpy(direction, "SW");
}
else if (West > North && West > Northeast && West > East && West > Southeast && West > South && West > Southwest && West > Northwest) {
    strcpy(direction, "W");
}
else if (Northwest > North && Northwest > Northeast && Northwest > East && Northwest > Southeast && Northwest > South && Northwest > Southwest && Northwest > West) {
    strcpy(direction, "NW");
}

    lcd_wind.setCursor(0, 2);
    lcd_wind.print(F("                    "));      
    lcd_wind.setCursor(0, 2);
    lcd_wind.print(F("wind direction: "));  
    lcd_wind.print(direction);
 
  
    // // This is just for testing
    // Serial.print("  ||  Dir Raw: ");
    // Serial.print(rawDir);
    // Serial.print(" | Dir Volt: ");
    // Serial.print(voltDir, 2);
    // Serial.print(F("Wind Direction: "));
    // Serial.print(wind_direction);
    // Serial.println(F(" deg"));


    previous_time_wind_check += 1000;
  }
  
  
  if (time_now - previous_time_temp_check > 900000){


// ------------------------------------------------------------------------------------------------------------------------
  int temp = bme.readTemperature();

  lcd.setCursor(0, 0);
  lcd.print(F("                    "));
  lcd.setCursor(0, 0);
  lcd.print(F("Temp = "));  
  lcd.print(temp);  
  lcd.print((char)223);

  // // Testing to see that the count works in serial
  // Serial.println(F("temp array count"));
  // Serial.println(temp_array_count);

  // places the temp value in the right array slot
  int array_place = temp_array_count % 96;
  temp_array[array_place] = temp;
  temp_array_count++;

  // // this is only for testing the array place
  // Serial.println(F("array place temp"));
  // Serial.println(array_place);
 
  // This whole chunk is for the high and low function
  int high_temp = temp_array[0];
  int low_temp = temp_array[0];

  for(int i = 0; i < 96; i++){

    if(temp_array[i] < low_temp && temp_array[i] != -50){
      low_temp = temp_array[i];
    }
    else if(temp_array[i] > high_temp){
      high_temp = temp_array[i];
    }
  }

  lcd.setCursor(12, 0);
  lcd.print(F("H"));  
  lcd.print(high_temp); 
  lcd.print(F(" L"));
  lcd.print(low_temp);

//--------------------------------------------------------------------------------------------------------------------------

  // This gets the pressure and turns the station pressure into sea level pressure
  float station_pressure = bme.readPressure() / 100.0; // BME280 gives Pa, convert to hPa
  int altitude = 410; // meters
  // I'm using int because I don't want the decimal place.
  unsigned int sea_level_pressure = station_pressure * pow((1 - (altitude / 44330.0)), -5.255);

  lcd.setCursor(0, 1); 
  lcd.print(F("Pres = "));  
  lcd.print(sea_level_pressure);  
  lcd.print(F(" hPa")); 

  // Array placement
  unsigned char array_place_pres = pres_array_count % 96;
  pres_array[array_place_pres] = sea_level_pressure;
  pres_array_count++;

  // // This is just for testing
  // Serial.println(F("pressure array place"));
  // Serial.println(pres_array_count);
  // Serial.println(F("array place presser"));
  // Serial.println(F("array place pressure"));
 

  unsigned int high_pres = pres_array[0];
  unsigned int low_pres = pres_array[0];

  for(int i = 0; i < 96; i++){
    if(pres_array[i] < low_pres && pres_array[i] != 100){
      low_pres = pres_array[i];
    }
    else if(pres_array[i] > high_pres){
      high_pres = pres_array[i];
    }
  }

  lcd.setCursor(0, 2);
  lcd.print(F("                    "));
  lcd.setCursor(0, 2); 
  lcd.print(F("HP"));  
  lcd.print(high_pres);  
  lcd.print(F(" LP")); 
  lcd.print(low_pres); 

//------------------------------------------------------------------------------------------------------------------------
  // humidity check
  // the int is so there should be no decimal
  int humidity = bme.readHumidity();
  lcd.setCursor(0, 3); 
  lcd.print(F("Humidity = "));  
  lcd.print(humidity);  
  lcd.print(F("%"));   

// -----------------------------------------------------------------------------------------------------------------------
  previous_time_temp_check += 900000;
  }
}

  
  // lcd.setCursor(0, 3); 
  // lcd.print("Altitude = ");  
  // lcd.print(bme.readAltitude(SEALEVELPRESSURE_HPA));  
  // lcd.print(" m");

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shmuel_rubin

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