TCP Client and Server- very slow transmissionrate
Posted: Fri Feb 10, 2017 11:56 amhello guys!
I have set up a ESP as a TCP server (which also hosts the WiFi) and one as a TCP client.
somehow the performance is too slow. I only get one request and response per second.
could you have a look at my code please?
Server code:
and here the Client code:
I also tried just to send data from the server towards the client (without request/response) ... in that case I had 3 packets per second, but that was still too poor.
I need packeds arround 100times, transmitted to 6 clients in a second for my project and i read that it should be possible.
Regards
Stefan
I have set up a ESP as a TCP server (which also hosts the WiFi) and one as a TCP client.
somehow the performance is too slow. I only get one request and response per second.
could you have a look at my code please?
Server code:
Code: Select all
//-- Libraries Included --------------------------------------------------------------
#include <ESP8266WiFi.h>
//------------------------------------------------------------------------------------
// Define I/O Pins
#define LED0 2 // WIFI Module LED
#define analogPin A0 // ADC pin lichtorgel
//------------------------------------------------------------------------------------
// Authentication Variables
char* ssid; // SERVER WIFI NAME
char* password; // SERVER PASSWORD
//------------------------------------------------------------------------------------
#define MAXSC 6 // MAXIMUM NUMBER OF CLIENTS
WiFiServer TCP_SERVER(9001); // THE SERVER AND THE PORT NUMBER
WiFiClient TCP_Client[MAXSC]; // THE SERVER CLIENTS Maximum number
//====================================================================================
void setup()
{
// Setting The Serial Port
Serial.begin(115200); // Computer Communication
// Setting The Mode Of Pins
pinMode(LED0, OUTPUT); // WIFI OnBoard LED Light
pinMode(analogPin, INPUT); // ADC PIN
// Setting Up A Wifi Access Point
SetWifi("TCP_SERVER","");
}
//====================================================================================
void loop()
{
HandleClients();
}
//====================================================================================
void SetWifi(char* Name, char* Password)
{
// Stop Any Previous WIFI
WiFi.disconnect();
// Setting The Wifi Mode
WiFi.mode(WIFI_AP_STA);
Serial.println("WIFI Mode : AccessPoint Station");
// Setting The AccessPoint Name & Password
ssid = Name;
password = Password;
// Starting The Access Point
WiFi.softAP(ssid, password);
Serial.println("WIFI < " + String(ssid) + " > ... Started");
// Wait For Few Seconds
delay(1000);
// Getting Server IP
IPAddress IP = WiFi.softAPIP();
// Printing The Server IP Address
Serial.print("AccessPoint IP : ");
Serial.println(IP);
// Starting Server
TCP_SERVER.begin();
Serial.println("Server Started");
}
//====================================================================================
void HandleClients()
{
if(TCP_SERVER.hasClient())
{
WiFiClient Client = TCP_SERVER.available();
while(1)
{
//---------------------------------------------------------------
// If Clients Are Connected
//---------------------------------------------------------------
if(Client.available())
{
// Here We Read The Message
String Message = Client.readStringUntil('\r');
// Here We Print The Message On The Screen
Serial.println(Message);
// Here We Reply To The Client With A Message
Client.print("Here is my Response!");
Client.flush();
}
//---------------------------------------------------------------
// If Clients Are Disconnected
//---------------------------------------------------------------
/* if(!TCP_Client || !TCP_Client.connected())
{
// Here We Turn Off The LED To Indicated The Its Disconnectted
//digitalWrite(LED1, LOW);
// Here We Jump Out Of The While Loop
break;
}
//----------------------------------------------------------------
*/
}
}
else
{
// This LED Blinks If No Clients Where Available
digitalWrite(LED0, HIGH);
delay(250);
digitalWrite(LED0, LOW);
delay(250);
}
}
and here the Client code:
Code: Select all
//------------------------------------------------------------------------------------
// Libraries Needed For This Project
//------------------------------------------------------------------------------------
#include <Wire.h> // To Be Able To Use Sensors Like IMU9050
#include <EEPROM.h> // To Be Able To Store & Read Data Between Power Off
#include <ESP8266WiFi.h> // The Basic Function Of The ESP NOD MCU
//------------------------------------------------------------------------------------
// Defining I/O Pins
//------------------------------------------------------------------------------------
#define LED0 2 // WIFI Module LED
const String Devicename = "Rainbow1";
//------------------------------------------------------------------------------------
//------------------------------------------------------------------------------------
// WIFI Authentication Variables
//------------------------------------------------------------------------------------
/* This Client Is Going To Connect To A WIFI Server Access Point
* So You Have To Specify Server WIFI SSID & Password In The Code Not Here
* Please See The Function Below Name (WiFi.Begin)
* If WIFI dont need Any password Then WiFi.begin("SSIDNAME")
* If WIFI needs a Password Then WiFi.begin("SSIDNAME", "PASSWORD")
*/
char* ssid; // Wifi Name
char* password; // Wifi Password
//------------------------------------------------------------------------------------
// WIFI Module Role & Port
//------------------------------------------------------------------------------------
/* This WIFI Module Code Works As A Client
* That Will Connect To A Server WIFI Modul With (IP ADDress 192.168.4.1)
*/
int TCP_ServerPort = 9001;
IPAddress TCP_Server(192,168,4,1);
WiFiClient TCP_Client;
//====================================================================================
void setup()
{
// Setting The Serial Port ----------------------------------------------
Serial.begin(115200); // Computer Communication
// Setting The Mode Of Pins ---------------------------------------------
pinMode(LED0, OUTPUT); // WIFI OnBoard LED Light
digitalWrite(LED0, !LOW); // Turn WiFi LED Off
// Print Message Of I/O Setting Progress --------------------------------
Serial.println("\nI/O Pins Modes Set .... Done");
// WiFi Connect ----------------------------------------------------
Check_WiFi_and_Connect_or_Reconnect(); // Checking For Connection
}
//====================================================================================
void loop()
{
Send_Request_To_Server();
}
//====================================================================================
void Send_Request_To_Server() {
TCP_Client.println("Here my message!");
if(TCP_Client.available()) {
String Response = TCP_Client.readStringUntil('\r');
Serial.println(Response);
}
TCP_Client.flush(); // Bufffer löschen
Check_WiFi_and_Connect_or_Reconnect();
}
//====================================================================================
void Check_WiFi_and_Connect_or_Reconnect()
{
if (WiFi.status() != WL_CONNECTED){
TCP_Client.stop(); //Erstmal sicher gehen dass alles resettet wurde
WiFi.disconnect();
Serial.println("Not Connected...trying to connect...");
//Serial.println("!--- Connecting To " + WiFi.SSID() + " ---!");
delay(5000);
WiFi.mode(WIFI_STA); // To Avoid Broadcasting An SSID
WiFi.begin("TCP_SERVER"); // The SSID That We Want To Connect To
while(WiFi.status() != WL_CONNECTED)
{
for(int i=0; i < 10; i++)
{
digitalWrite(LED0, !HIGH);
delay(250);
digitalWrite(LED0, !LOW);
delay(250);
Serial.print(".");
}
Serial.println("");
}
// Stop Blinking To Indicate Connected ----------------------------------
digitalWrite(LED0, !HIGH);
Serial.println("!-- Client Device Connected --!");
// Printing IP Address --------------------------------------------------
Serial.println("Connected To : " + String(WiFi.SSID()));
Serial.println("Signal Strenght : " + String(WiFi.RSSI()) + " dBm");
Serial.print ("Server IP Address : ");
Serial.println(TCP_Server);
Serial.print ("Device IP Address : ");
Serial.println(WiFi.localIP());
// Conecting The Device As A Client -------------------------------------
Tell_Server_we_are_there();
}
}
//====================================================================================
void I2C_Begin()
{
/* ----------------------------------------------------------------------
* Setting The I2C Pins SDA, SCL
* Because We Didnt Specify Any Pins The Defult
* SDA = D4 <GPIO2>, SCL = D5 <GPIO14> For ESP8266 Dev Kit Node MCU v3
--------------------------------------------------------------------- */
// Frequency Of The I2C
#define TWI_FREQ 400000L // I2C Frequency Setting To 400KHZ
// If Ever You Needed To Use Wire I2C
Wire.begin(); // Begginning The I2C
// Setting Up The I2C Of The MPU9250 ------------------------------------
Wire.setClock(TWI_FREQ); // Setting The Frequency MPU9250 Require
}
//====================================================================================
void Tell_Server_we_are_there()
{
// First Make Sure You Got Disconnected
TCP_Client.stop();
// If Sucessfully Connected Send Connection Message
if(TCP_Client.connect(TCP_Server, TCP_ServerPort))
{
Serial.println ("<" + Devicename + "-CONNECTED>");
TCP_Client.println ("<" + Devicename + "-CONNECTED>");
}
}
//====================================================================================
I also tried just to send data from the server towards the client (without request/response) ... in that case I had 3 packets per second, but that was still too poor.
I need packeds arround 100times, transmitted to 6 clients in a second for my project and i read that it should be possible.
Regards
Stefan