Weather thingi

Weather module

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

(jumper) Cables
Wemos D1 Mini control board
BME280 sensor
3d printed enclosure (https://www.thingiverse.com/thing:3768019)

Wiring BME to weemos

VIN -> 3v3
GND -> GND
SCL -> D5
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("");
            client.println("");
               client.println("");
            client.println("ESP8266 Readings");
            client.println(""); // Refresh the screen every 15-seconds
            client.println("");
            client.println("");
              client.println("Temp and Humidity for July 2019 3D Mystery Box");
              client.println("");
                client.println("");
                  client.println("");
                  client.println("");
                  client.println("");
                  client.println("");
                  client.println("");
                client.println("");
                client.println("");
                  client.println(""); // Mixing HTML with sensor values for display
                  client.println("");
                  client.println("");
                  client.println("");
                  client.println("");
                client.println("");
              client.println("

Temperature	Humidity	Pressure	Dew Point	Heat Index
"+String(bme_temp,1) + "°C	"+String(bme_humidity,1) + "% RH	"+String(bme_pressure,1) + " hPa	"+String(dew_point,1) + "°C	"+String(heat_index,1) + "°C

"); client.println("

"); // And display how many times the screen has been refreshed client.println(""); client.println(""); 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 }

}

Temp and Humidity for July 2019 3D Mystery Box

© D Bird 2016 ("+String(count)+")