Weather thingi: Difference between revisions

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Line 26: Line 26:
*SCL -> D5
*SCL -> D5
*SDA -> D4
*SDA -> D4
Code
// ESP8266 WebServer
//
//
#include <Wire.h>
#include <ESP8266WiFi.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
const char *ssid    = ""; // Your SSID here
const char *password = ""; // Your password here
IPAddress ip(192, 168, 1, 223);  // The address 192.168.0.53 is arbitary, if could be any address in the range of your router, but not another device!
IPAddress gateway(192,168,1,1);  // My router has this base address
IPAddress subnet(255,255,255,0); // Define the sub-network
float bme_pressure, bme_temp, bme_humidity;
int count = 0;
WiFiServer server(80);
Adafruit_BME280 bme; // Note Adafruit assumes I2C adress = 0x77 my module (eBay) uses 0x76 so the library address has been changed.
void setup() {
  Serial.begin(115200);
  Serial.print("Connecting to ");
  Serial.println(ssid);          // Connect to WiFi network
  WiFi.config(ip, gateway, subnet);
  WiFi.persistent(false);  // disables the storage of credentials to flash.
  WiFi.begin(ssid, password); 
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connected..");
  // Start the webserver
  server.begin();
  Serial.println("Webserver started...");
  pinMode(D4, INPUT_PULLUP); //Set input (SDA) pull-up resistor on
  Wire.setClock(2000000);    // Set I2C bus speed
  Wire.begin(D4,D5); // Define which ESP8266 pins to use for SDA, SCL of the Sensor
  if (!bme.begin()) {
    Serial.println("Could not find a valid BME280 sensor, check wiring!");
    while (1);
  }
}
void loop() {
  // Check if a client has connected
  WiFiClient client = server.available();
  if (client) { // an http request has been made
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();  // if at the end of a line because newline character received and the line is blank, the http request is complete, so the client can receive a response
        if (c == '\n' && currentLineIsBlank) {
          bme_temp    = bme.readTemperature();        // No correction factor needed for this sensor
          delay(1000);
          bme_humidity = bme.readHumidity() + 1.0;    // Plus a correction factor for this sensor
          delay(1000);
          bme_pressure = bme.readPressure()/100 + 3.7; // Plus a correction factor for this sensor
          Serial.println(bme_temp);
          Serial.println(bme_humidity);
          Serial.println(bme_pressure);
          float T = (bme_temp * 9 / 5) + 32;          // Convert back to deg-F for the RH equation
          float RHx = bme_humidity;                    // Short form of RH for inclusion in the equation makes it easier to read
          float heat_index = (-42.379+(2.04901523*T)+(10.14333127*RHx)-(0.22475541*T*RHx)-(0.00683783*sq(T))-(0.05481717*sq(RHx))+(0.00122874*sq(T)*RHx)+(0.00085282*T*sq(RHx))-(0.00000199*sq(T)*sq(RHx))-32)*5/9;
          if ((bme_temp <= 26.66) || (bme_humidity <= 40)) heat_index = bme_temp; // The convention is not to report heat Index when temperature is < 26.6 Deg-C or humidity < 40%
          float dew_point = 243.04*(log(bme_humidity/100)+((17.625*bme_temp)/(243.04+bme_temp)))/(17.625-log(bme_humidity/100)-((17.625*bme_temp)/(243.04+bme_temp)));
          // Now send a correctly formatted HTML response together with the sensor data, statements indented to help with HTML formatting
          client.println("<!DOCTYPE HTML>");
          client.println("<html>");
            client.println("<head>");
              client.println("<style>");
                client.println("h2 { color: blue; font-family: verdana; font-size: 200%; text-align: left; display:inline; } ");
                client.println("table { font-family: arial, sans-serif; font-size: 150%; border-collapse: collapse; border: 3px blue; width: 60%; }");
                client.println("td, th {  border: 1px solid blue; text-align: center; padding: 8px; } ");
                client.println("tr:nth-child(even) { background-color: skyblue; }");
              client.println("</style>");
            client.println("<title>ESP8266 Readings</title>");
            client.println("<meta http-equiv=\"refresh\" content=\"15\">"); // Refresh the screen every 15-seconds
            client.println("</head>");
            client.println("<body>");
              client.println("<h2>Temp and Humidity for July 2019 3D Mystery Box</h2>");
              client.println("<table>");
                client.println("<tr>");
                  client.println("<th>Temperature</th>");
                  client.println("<th>Humidity</th>");
                  client.println("<th>Pressure</th>");
                  client.println("<th>Dew Point</th>");
                  client.println("<th>Heat Index</th>");
                client.println("</tr>");
                client.println("<tr>");
                  client.println("<td> "+String(bme_temp,1)    + "&deg;C</td>"); // Mixing HTML with sensor values for display
                  client.println("<td> "+String(bme_humidity,1) + "% RH</td>");
                  client.println("<td> "+String(bme_pressure,1) + " hPa</td>");
                  client.println("<td> "+String(dew_point,1)    + "&deg;C</td>");
                  client.println("<td> "+String(heat_index,1)  + "&deg;C</td>");
                client.println("</tr>");
              client.println("</table>");
              client.println("<h6>&copy; D Bird 2016 ("+String(count)+")</h6>"); // And display how many times the screen has been refreshed
            client.println("</body>");
          client.println("</html>");
          break;
        }
        if (c == '\n') {
          currentLineIsBlank = true;  // It's a new line
        } else if (c != '\r') {
          currentLineIsBlank = false; // There's a character on the current line
        }
      }
    }
    delay(10);
    client.flush();    // Flush the buffers
    client.stop();      // Close the Client connection
    count = count + 1;  // Increase refresh indicator count
    delay(5000);        // Control speed of BME280 sensor reading
  }
}

Revision as of 15:21, 31 July 2019

Weather module
NoPicture.png
Participants
Skills Soldering, Programming, 3D Printing
Status Done
Niche Documentation
Purpose Electronics, fun, world domination
Tool No
Location
Cost
Tool category Electronics

Weather module Property "Tool Image" (as page type) with input value "File:{{{Picture}}}" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process. {{{Picture}}} {{#if:No | [[Tool Owner::{{{ProjectParticipants}}} | }} {{#if:No | [[Tool Cost::{{{Cost}}} | }}

I am a member of the eu3d mystery box every month you get some samples plus a mini project

this time it was a weather thingi (i seriously need to find a better name)

BOM

Wiring BME to weemos

  • VIN -> 3v3
  • GND -> GND
  • SCL -> D5
  • SDA -> D4