Esp-01 Connection
Posted:
Tue Dec 04, 2018 3:20 amby magpa
Until 1 week ago I connect my wificlient with:
if (client.connect(host, 80)) {
client.println(String("GET /waitfordbcommand.aspx" + matricola + String(" HTTP/1.1"));
client.println("Host: " + host );
client.println("Connection: close");
client.println();
}
where host was: "miodominio.com"
Since now esp no connects no more. I try to put IP address of the host and in this case it connects .
I thought it depended from router, I switch off and on the router, but nothing.
Why happened this? What is it depend from?
Please help me thanks.
paolo
Re: Esp-01 Connection
Posted:
Wed Dec 05, 2018 3:58 amby QuickFix
Your problem has nothing to do with the ESP, please read this:
"How domain name servers work".
Re: Esp-01 Connection
Posted:
Thu Dec 06, 2018 1:05 amby magpa
Hi QuickFix thanks for your answer.
I know what you said but until now I use the following to config ESP:
IPAddress ip(192, 168, 1, 100);
IPAddress gateway(192, 168, 1, 1);
IPAddress subnet(255, 255, 255, 0);
WiFi.config(ip, gateway, subnet);
and when I sent
client.connect("miodominio", 80);
every thing worked very good and fast.
Now no more, then do you think something has changed in my router? I realy have to say that if I put dns with thew some address of gateway (router):
IPAddress ip(192, 168, 1, 100);
IPAddress gateway(192, 168, 1, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress dns(192, 168, 1, 1);
WiFi.config(ip, gateway, subnet, dns);
the connection works also if takes almost 40-50 secs to realize connection.
Instead if I put directly the address in the connection and I don't use dns in config
the connection up in 3-5 seconds.
Could all this depend from the router conf?
I didn't touch any time the router configurations, then this mean the provider changed some parameter in the router without telling me anything? Or what else?
Re: Esp-01 Connection
Posted:
Fri Dec 07, 2018 3:45 amby QuickFix
In that case it looks like DHCP on your router is not working correctly (does, for instance, your mobile and/or laptop get a valid IP and gateway?) or something is going wrong while your ESP is retrieving and setting a gateway- (and possibly even a valid IP-) address from the router.
You could try to
blank your ESP so that all is as new and flash a simple example client that just obtains an IP address (and gateway) from a router and does a simple GET-request.
Code: Select all#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
// WiFi parameters to be configured
const char* ssid = "ID_Of_Router"; // Case sensitive
const char* password = "Pass_Of_Router"; // Case sensitive
const char* http_site = "http://jsonplaceholder.typicode.com/users";
const int http_port = 80;
void setup(void) {
Serial.begin(9600);
Serial.print("Busy connecting");
WiFi.begin(ssid, password); // Connect to WiFi
// while wifi not connected yet, print '.'
// then after it connected, get out of the loop
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// Connnected.
Serial.println("OK!");
// Access Point (SSID).
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// IP address.
Serial.print("IP: ");
Serial.println(WiFi.localIP());
// Signaalsterkte.
long rssi = WiFi.RSSI();
Serial.print("RSSI: ");
Serial.print(rssi);
Serial.println(" dBm");
Serial.println("");
}
void loop() {
if(WiFi.status()== WL_CONNECTED){ //Check WiFi connection status
HTTPClient http; //Declare an object of class HTTPClient
http.begin("http://jsonplaceholder.typicode.com/users/1"); //Specify request destination
int httpCode = http.GET(); //Send the request
if (httpCode > 0) { //Check the returning code
String payload = http.getString(); //Get the request response payload
Serial.println(payload); //Print the response payload
}
http.end(); //Close connection
} else {
Serial.println("Error in WiFi connection");
}
delay(30000); //Send a request every 30 seconds
} Source