ESP 8266 เชื่อมต่อกับ เน็ตของโทรศัพท์ครับ Run ได้ปกติ แต่ค่าไม่แสดงที่ Google หรือ web server ครับ แก้ไขยังไงครับ
#include <ESP8266WiFi.h>
#define echoPin D7 // Echo Pin
#define trigPin D6 // Trigger Pin
int LED = D5;
const char* ssid = "book";
const char* password = "book1518";
double readCmDistance()
{
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
//Return calculate the distance (in cm) based on the speed of sound.
return pulseIn(echoPin, HIGH)/58.2;
}
WiFiServer server(80);
void setup() {
pinMode(LED,OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(115200);
delay(10);
// prepare GPIO2
pinMode(5, OUTPUT);
digitalWrite(5, 0);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
digitalWrite(LED,HIGH);
}
Serial.println("");
Serial.println("WiFi connected");
// Start the server
server.begin();
Serial.println("Server started");
// Print the IP address
Serial.println(WiFi.localIP());
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
unsigned long timeout = millis() + 3000;
while (!client.available() && millis() < timeout) {
delay(1);
}
if (millis() > timeout) {
Serial.println("timeout");
client.flush();
client.stop();
return;
}
// Read the first line of the request
String req = client.readStringUntil('\r');
Serial.println(req);
client.flush();
// Match the request
int val;
if (req.indexOf("/gpio/0") != -1) {
val = 0;
} else if (req.indexOf("/gpio/1") != -1) {
val = 1;
} else {
Serial.println("invalid request");
client.stop();
return;
}
// Set GPIO2 according to the request
digitalWrite(5, val);
client.flush();
// Prepare the response
String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n\r\n\r\ ";
s += "\n";
if (val) s += "" + String(readCmDistance()) + " cm.\n";
// Send the response to the client
client.print(s);
delay(1);
Serial.println("Client disconnected");
// The client will actually be disconnected
// when the function returns and 'client' object is detroyed
}
