openrc-gps-speedo

openrc-gps-speedo.ino

// Load Wi-Fi library
#include <WiFi.h>
#include <SoftwareSerial.h>
#include <TinyGPS.h>

//#include "SD.h"
//#include <SPI.h>

// Define CS pin for the SD card module
#define SD_CS 5


TinyGPS gps;
SoftwareSerial gpsSerial(14, 27);

static void print_int(unsigned long val, unsigned long invalid, int len);
static void print_date(TinyGPS &gps);

// Replace with your network credentials
const char* ssid     = "OpenRC_GPS";
const char* password = NULL;

float top_kmph = 0.00;
float current_kmph;
int   current_sats;
float flat, flon;
unsigned long age;

// Set web server port number to 80
WiFiServer server(80);

// Variable to store the HTTP request
String header;

void setup() {
  gpsSerial.begin(9600);
  Serial.begin(115200);
  Serial.println(TinyGPS::library_version());

//  // Initialize SD card
//  SD.begin(SD_CS);
//
//  uint8_t cardType = SD.cardType();
//  if (cardType == CARD_NONE) {
//    Serial.println("No SD card attached");
//    return;
//  }
//  if (!SD.begin(SD_CS)) {
//    Serial.println("Card Mount Failed");
//    return;
//  }
//  
//  Serial.println("Initializing SD card...");
//  if (!SD.begin(SD_CS)) {
//    Serial.println("ERROR - SD card initialization failed!");
//    return;    // init failed
//  }
//
//  // If the data.txt file doesn't exist
//  // Create a file on the SD card and write the data labels
//  File file = SD.open("/data.txt");
//  if (!file) {
//    Serial.println("File doens't exist");
//    Serial.println("Creating file...");
//    writeFile(SD, "/data.txt", "Reading ID, Date, Hour, Temperature \r\n");
//  }
//  else {
//    Serial.println("File already exists");
//  }
//  file.close();

  // Connect to Wi-Fi network with SSID and password
  Serial.print("Setting AP (Access Point)…");
  // Remove the password parameter, if you want the AP (Access Point) to be open
  WiFi.softAP(ssid, password);

  IPAddress IP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(IP);

  server.begin();
}

static void print_date(TinyGPS &gps)
{
  int year;
  byte month, day, hour, minute, second, hundredths;
  unsigned long age;
  gps.crack_datetime(&year, &month, &day, &hour, &minute, &second, &hundredths, &age);
  if (age == TinyGPS::GPS_INVALID_AGE)
    Serial.print("********** ******** ");
  else
  {
    char sz[32];
    sprintf(sz, "%02d/%02d/%02d %02d:%02d:%02d ",
            month, day, year, hour, minute, second);
    Serial.print(sz);
  }
  //  print_int(age, TinyGPS::GPS_INVALID_AGE, 5);

}

void loop() {

  bool newData = false;

  for (unsigned long start = millis(); millis() - start < 500;) {
    while (gpsSerial.available()) {
      char c = gpsSerial.read();
      //Serial.write(c); // uncomment this line if you want to see the GPS data flowing
      if (gps.encode(c)) // Did a new valid sentence come in?
        newData = true;
    }
  }

  if (newData) {

    gps.f_get_position(&flat, &flon, &age);

    // Current kmph
    current_kmph = gps.f_speed_kmph() == TinyGPS::GPS_INVALID_F_SPEED ? 0 : gps.f_speed_kmph();
    current_sats = gps.satellites() == TinyGPS::GPS_INVALID_SATELLITES ? 0 : gps.satellites();
    //    print_date(gps);
//    Serial.print("SPEED=");
//    Serial.print(current_kmph);
//    Serial.print(" SAT=");
//    Serial.println(current_sats);
//    Serial.print(" LAT=");
//    Serial.print(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6);
//    Serial.print(" LON=");
//    Serial.print(flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6);
//    Serial.print(" PREC=");
//    Serial.print(gps.hdop() == TinyGPS::GPS_INVALID_HDOP ? 0 : gps.hdop());

    if (current_kmph > top_kmph) {
      top_kmph = current_kmph;
    }

  }
  WiFiClient client = server.available();   // Listen for incoming clients

  if (client) {                             // If a new client connects,
    Serial.println("New Client.");          // print a message out in the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected()) {            // loop while the client's connected
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        header += c;
        if (c == '\n') {                    // if the byte is a newline character
          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {

            if (header.indexOf("GET /reset") >= 0) {
              Serial.println("Reset top speed to 0.00");
              top_kmph = 0.00;
              client.println("HTTP/1.1 302 Found");
              client.println("Location: /");
              client.println("Connection: close");
              client.println();
              break;
            }
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println("Connection: close");
            client.println();

            //            // turns the GPIOs on and off
            //            if (header.indexOf("GET /26/on") >= 0) {
            //              Serial.println("GPIO 26 on");
            //              output26State = "on";
            //              digitalWrite(output26, HIGH);
            //            } else if (header.indexOf("GET /26/off") >= 0) {
            //              Serial.println("GPIO 26 off");
            //              output26State = "off";
            //              digitalWrite(output26, LOW);
            //            } else if (header.indexOf("GET /27/on") >= 0) {
            //              Serial.println("GPIO 27 on");
            //              output27State = "on";
            //              digitalWrite(output27, HIGH);
            //            } else if (header.indexOf("GET /27/off") >= 0) {
            //              Serial.println("GPIO 27 off");
            //              output27State = "off";
            //              digitalWrite(output27, LOW);
            //            }

            // Display the HTML web page
            client.println("<!DOCTYPE html><html>");
            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">"); // <meta http-equiv=\"refresh\" content=\"2\">
            client.println("<link rel=\"icon\" href=\"data:,\">");
            // CSS to style the on/off buttons
            // Feel free to change the background-color and font-size attributes to fit your preferences
            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
            client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
            client.println(".button2 {background-color: #555555;}</style></head>");

            // Web Page Heading
            client.println("<body><h1>OpenF1 RC - GPS Speed</h1>");


            client.println("<center><table border=1>");

            client.print("<tr><td width=\"150\">Top Speed</td><td>");
            client.print(top_kmph);
            client.println("</td></tr>");

            client.print("<tr><td>Current Speed</td><td>");
            client.print(current_kmph);
            client.println("</td></tr>");

            client.print("<tr><td>GPS Sats</td><td>");
            client.print(current_sats);
            client.println("</td></tr>");

            client.print("<tr><td>LONG</td><td>");
            client.print(flon == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flon, 6);
            client.println("</td></tr>");

            client.print("<tr><td>LAT</td><td>");
            client.print(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0.0 : flat, 6);
            client.println("</td></tr>");

            client.println( "</table></center>");

            client.println("<p><a href=\"/reset\"><button class=\"button\">Reset</button></a></p>");

            client.println("</body></html>");

            // The HTTP response ends with another blank line
            client.println();
            // Break out of the while loop
            break;
          } else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    //    Serial.println("Client disconnected.");
    //    Serial.println("");
  }
}

//// Write to the SD card (DON'T MODIFY THIS FUNCTION)
//void writeFile(fs::FS &fs, const char * path, const char * message) {
//  Serial.printf("Writing file: %s\n", path);
//
//  File file = fs.open(path, FILE_WRITE);
//  if (!file) {
//    Serial.println("Failed to open file for writing");
//    return;
//  }
//  if (file.print(message)) {
//    Serial.println("File written");
//  } else {
//    Serial.println("Write failed");
//  }
//  file.close();
//}
//// Append data to the SD card (DON'T MODIFY THIS FUNCTION)
//void appendFile(fs::FS &fs, const char * path, const char * message) {
//  Serial.printf("Appending to file: %s\n", path);
//
//  File file = fs.open(path, FILE_APPEND);
//  if (!file) {
//    Serial.println("Failed to open file for appending");
//    return;
//  }
//  if (file.print(message)) {
//    Serial.println("Message appended");
//  } else {
//    Serial.println("Append failed");
//  }
//  file.close();
//}