Server monitoring clients
Posted: Sat Jan 18, 2020 5:53 pm
Hello. This is my first time creating a project using ESPs and is also my first time in the forum.
I am making a simple project that consists of a server that constantly monitors clients connected into it. I am using ESP32 as a server in soft AP mode and ESP01s as the connected clients in station mode. The server(ESP32) is being updated of the connected clients(ESP01) via serial monitor. Once a connection is established, it displays a "station connected" text and its MAC address.
My problem is that the clients maintain their connection to the server even after disconnecting the client's power source. This poses a problem when determining if the client has gone out of range from the server.
this is the code uploaded on the client:
and on the server:
Please excuse my lack of knowledge since I only started this recently and have no background in such. Thus, I am missing out on a lot of information here. I hope you can help me with my problem as well as educate me. Thank you.
I am making a simple project that consists of a server that constantly monitors clients connected into it. I am using ESP32 as a server in soft AP mode and ESP01s as the connected clients in station mode. The server(ESP32) is being updated of the connected clients(ESP01) via serial monitor. Once a connection is established, it displays a "station connected" text and its MAC address.
My problem is that the clients maintain their connection to the server even after disconnecting the client's power source. This poses a problem when determining if the client has gone out of range from the server.
this is the code uploaded on the client:
Code: Select all
#include<ESP8266WiFi.h>
const char* ssid = "ESP32";
const char* password = "12345678";
void setup(){
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
}
void loop(){
}Code: Select all
#include <WiFi.h>
WiFiServer server(80);
bool alreadyConnected = false;
const char *ssid = "ESP32";
const char *password = "12345678";
IPAddress local_IP(192, 168, 4, 1);
IPAddress gateway(192, 168, 4, 1);
IPAddress subnet(255, 255, 0, 0);
void WiFiStationConnected(WiFiEvent_t event, WiFiEventInfo_t info){
Serial.println("Station connected");
for(int i = 0; i< 6; i++){
Serial.printf("%02X", info.sta_connected.mac[i]);
if(i<5)Serial.print(":");
}
Serial.println("\n------------");
}
void WiFiStationDisconnected(WiFiEvent_t event, WiFiEventInfo_t info){
Serial.println("Station disconnected");
for(int i = 0; i< 6; i++){
Serial.printf("%02X", info.sta_disconnected.mac[i]);
if(i<5)Serial.print(":");
}
Serial.println("\n------------");
}
void setup() {
Serial.begin(115200);
WiFi.softAP(ssid, password);
WiFi.config(local_IP, gateway, subnet);
delay(3000);
WiFi.onEvent(WiFiStationConnected, SYSTEM_EVENT_AP_STACONNECTED);
WiFi.onEvent(WiFiStationDisconnected, SYSTEM_EVENT_AP_STADISCONNECTED);
}
void loop() {
// wait for a new client:
WiFiClient client = server.available();
// when the client sends the first byte, say hello:
if (client) {
if (client.connected()) {
if (!alreadyConnected) {
Serial.println("We have a new client");
client.println("Hello, client!");
alreadyConnected = true;
}
while (client.available()) {
// read the byte incoming from the client:
char c = client.read();
// echo the byte back to the client:
client.write(c);
// echo the byte to the server as well:
Serial.write(c);
}
} else {
alreadyConnected = false;
client.stop();
}
}
}