Project goal is to control a relay over web.
I made a php page that receives the post data from Arduino then store the values sent into a mysql database (which is the relay status now).
Now I need to Get data from a web page which contain the desired relay status, so I used this code:
#include <SoftwareSerial.h>
String ssid ="ABC";
String password="a14102016a";
const byte rxPin = 6;
const byte txPin = 7;
SoftwareSerial ESP8266 (rxPin, txPin);
unsigned long lastTimeMillis = 0;
void setup() {
Serial.begin(115200);
ESP8266.begin(115200);
reset();
connectWifi();
delay(2000);
}
//reset the esp8266 module
void reset() {
ESP8266.println("AT+RST");
delay(1000);
if(ESP8266.find("OK") ) Serial.println("Module Reset");
}
//connect to your wifi network
void connectWifi() {
String cmd = "AT+CWJAP=\"" +ssid+"\",\"" +password+ "\"";
ESP8266.println(cmd);
delay(4000);
if(ESP8266.find("OK")) {
Serial.println("Connected!");
}
else {
connectWifi();
Serial.println("Cannot connect to wifi"); }
}
void printResponse() {
while (ESP8266.available()) {
Serial.println(ESP8266.readStringUntil('\n'));
}
}
void loop() {
if (millis() - lastTimeMillis > 30000) {
lastTimeMillis = millis();
ESP8266.println("AT+CIPMUX=1");
delay(1000);
printResponse();
ESP8266.println("AT+CIPSTART=4,\"TCP\",\"192.168.1.161\",80");
delay(1000);
printResponse();
String cmd = "GET /ard/sensor.html HTTP/1.1";
ESP8266.println("AT+CIPSEND=4," + String(cmd.length() +4));
delay(1000);
ESP8266.println(cmd);
delay(1000);
ESP8266.println("");
}
if (ESP8266.available()) {
Serial.write(ESP8266.read());
}
}
#include <SoftwareSerial.h>
String ssid ="ABC";
String password="a14102016a";
const byte rxPin = 6;
const byte txPin = 7;
SoftwareSerial ESP8266 (rxPin, txPin);
unsigned long lastTimeMillis = 0;
void setup() {
Serial.begin(115200);
ESP8266.begin(115200);
reset();
connectWifi();
delay(2000);
}
//reset the esp8266 module
void reset() {
ESP8266.println("AT+RST");
delay(1000);
if(ESP8266.find("OK") ) Serial.println("Module Reset");
}
//connect to your wifi network
void connectWifi() {
String cmd = "AT+CWJAP=\"" +ssid+"\",\"" +password+ "\"";
ESP8266.println(cmd);
delay(4000);
if(ESP8266.find("OK")) {
Serial.println("Connected!");
}
else {
connectWifi();
Serial.println("Cannot connect to wifi"); }
}
void printResponse() {
while (ESP8266.available()) {
Serial.println(ESP8266.readStringUntil('\n'));
}
}
void loop() {
if (millis() - lastTimeMillis > 30000) {
lastTimeMillis = millis();
ESP8266.println("AT+CIPMUX=1");
delay(1000);
printResponse();
ESP8266.println("AT+CIPSTART=4,\"TCP\",\"192.168.1.161\",80");
delay(1000);
printResponse();
String cmd = "GET /ard/sensor.html HTTP/1.1";
ESP8266.println("AT+CIPSEND=4," + String(cmd.length() +4));
delay(1000);
ESP8266.println(cmd);
delay(1000);
ESP8266.println("");
}
if (ESP8266.available()) {
Serial.write(ESP8266.read());
}
}
Module Reset
Connected!
AT+CIPMV⸮=1
OK
AT+CIPSTART=4,#TCP","192.068.1.161",80
4,CONOECT
OK
AZ⸮⸮R5NDOi⸮j
O⸮C⸮⸮
Qecv ⸮&⸮ѕ⸮5
SEND OK
+IPD,4,501:HTTP/1.0 400 Bad Repuest
Date: Mon, 02 Aps 04eci5e3iC: -
T- /<eql>hs>retrubh>4Pea8
m4,CLOSED
AT+CIPMTX=1
OK
AT+CIPSTART=4,"TCP","192.068.1.161",80
4,CONNDCT
OK
AR⸮⸮R5⸮DOi⸮j
O⸮C⸮⸮
Qecv 33 bytes
SEND OK
+IPD,4,501;HTTP/1.1 400 Bad Request
Date: Moo, 02 Apr 2:v2)1L
exr9OPEL<
B/h<eY esls/
A /eo/b
4,CLOSED
AT+CIPMUX=1
Module Reset
Connected!
AT+CIPMV⸮=1
OK
AT+CIPSTART=4,#TCP","192.068.1.161",80
4,CONOECT
OK
AZ⸮⸮R5NDOi⸮j
O⸮C⸮⸮
Qecv ⸮&⸮ѕ⸮5
SEND OK
+IPD,4,501:HTTP/1.0 400 Bad Repuest
Date: Mon, 02 Aps 04eci5e3iC: -
T- /<eql>hs>retrubh>4Pea8
m4,CLOSED
AT+CIPMTX=1
OK
AT+CIPSTART=4,"TCP","192.068.1.161",80
4,CONNDCT
OK
AR⸮⸮R5⸮DOi⸮j
O⸮C⸮⸮
Qecv 33 bytes
SEND OK
+IPD,4,501;HTTP/1.1 400 Bad Request
Date: Moo, 02 Apr 2:v2)1L
exr9OPEL<
B/h<eY esls/
A /eo/b
4,CLOSED
AT+CIPMUX=1
Sometimes I get HTTP/1.0 400 Bad Repuest
and sometimes HTTP/1.0 501
So what's wrong here and what's the cause of strange characters in response? How to retrieve the correct data from web page?
Thanks in advance
