/*
My Program
*/
#include <SPI.h>
#include <WiFiNINA.h>
#include <Ultrasonic.h>
#include <Wire.h>
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = ""; // your network SSID (name)
char pass[] = ""; // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0; // your network key index number (needed only for WEP)
int status = WL_IDLE_STATUS;
unsigned char data[4]={};
float distance;
// define ultrasonic ranger data pin
#define RANGERPIN 3
// initialize ultrasonic library
Ultrasonic ultrasonic(RANGERPIN);
WiFiServer server(80);
void setup() {
//Initialize serial and wait for port to open:
Serial.begin(19200);
Serial1.begin(9600);
// while (!Serial) {
// ; // wait for serial port to connect. Needed for native USB port only
// }
// check for the WiFi module:
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
String fv = WiFi.firmwareVersion();
if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
Serial.println(fv);
Serial.println(WIFI_FIRMWARE_LATEST_VERSION);
Serial.println("Please upgrade the firmware");
}
// attempt to connect to WiFi network:
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait 5 seconds for connection:
delay(5000);
}
server.begin();
// you're connected now, so print out the status:
printWifiStatus();
}
void loop() {
char _buffer[7];
int centimeters;
if (WiFi.status() != WL_CONNECTED) {
Serial.println("Reconnecting to WiFi...");
WiFi.disconnect();
WiFi.begin(ssid, pass);
delay(5000);
}
// listen for incoming clients
WiFiClient client = server.available();
if (client) {
Serial.println("new client");
// an HTTP request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the HTTP request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard HTTP response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
//read the pushbutton value into a variable
//int sensorVal = digitalRead(3);
//print out the value of the pushbutton
//client.println(sensorVal);
// get distance in centimeters
//centimeters = ultrasonic.MeasureInCentimeters();
do{
for(int i=0;i<4;i++)
{
data[i]=Serial1.read();
client.println(data[i]);
}
}while(Serial1.read()==0xff);
Serial1.flush();
if(data[0]==0xff)
{
int sum;
sum=(data[0]+data[1]+data[2])&0x00FF;
if(sum==data[3])
{
distance=(data[1]<<8)+data[2];
if(distance>30)
{
client.print("distance=");
client.print(distance/10);
client.println("cm");
}else
{
client.println("Below the lower limit");
}
}else client.println("ERROR");
}
// client.print("Distance is: ");
// client.print(distance);//0~400cm
// client.println(" cm");
// client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1000);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your board's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}