SoftAP TCP connection not working
Posted: Thu Aug 11, 2016 5:01 pmHi all,
I've been at this for days, but cannot successfully communicate with the ESP8266 in softAP mode via telnet. I've modified the WifiTelnetToSerial sketch to work in AP mode but I can't maintain a connection. On the other end, my phone is connected directly to the AP. Using a Telnet app and attempting to connect always yields a connection error. Here's my code:
Trying repeatedly to connect prints this result:
Ready! Use 'telnet 192.168.4.1 23' to connect
New client: 0New client: 0New client: 0New client: 0
I'm trying to create some wearables that display images and/or return data to a phone based on TCP commands but have not made much progress. Can anyone tell me what I'm doing wrong?
I've been at this for days, but cannot successfully communicate with the ESP8266 in softAP mode via telnet. I've modified the WifiTelnetToSerial sketch to work in AP mode but I can't maintain a connection. On the other end, my phone is connected directly to the AP. Using a Telnet app and attempting to connect always yields a connection error. Here's my code:
Code: Select all
#include <ESP8266WiFi.h>
IPAddress ip(192,168,0,100); //Node static IP
IPAddress gateway(192,168,0,1);
IPAddress subnet(255,255,255,0);
//how many clients should be able to telnet to this ESP8266
#define MAX_SRV_CLIENTS 1
const char* ssid = "telnet_test";
const char* password = "";
WiFiServer server(23);
WiFiClient serverClients[MAX_SRV_CLIENTS];
void setup() {
WiFi.softAP(ssid, password);
WiFi.config(ip, gateway, subnet);
//start UART and the server
Serial.begin(115200);
server.begin();
server.setNoDelay(true);
Serial.print("\n\n\n");
Serial.print("Ready! Use 'telnet ");
Serial.print(WiFi.softAPIP());
Serial.println(" 23' to connect");
}
void loop() {
uint8_t i;
//check if there are any new clients
if (server.hasClient()){
for(i = 0; i < MAX_SRV_CLIENTS; i++){
//find free/disconnected spot
if (!serverClients[i] || !serverClients[i].connected()){
if(serverClients[i]) serverClients[i].stop();
serverClients[i] = server.available();
Serial.print("New client: "); Serial.print(i);
continue;
}
}
//no free/disconnected spot so reject
WiFiClient serverClient = server.available();
serverClient.stop();
}
//check clients for data
for(i = 0; i < MAX_SRV_CLIENTS; i++){
if (serverClients[i] && serverClients[i].connected()){
if(serverClients[i].available()){
//get data from the telnet client and push it to the UART
while(serverClients[i].available()) Serial.write(serverClients[i].read());
}
}
}
//check UART for data
if(Serial.available()){
size_t len = Serial.available();
uint8_t sbuf[len];
Serial.readBytes(sbuf, len);
//push UART data to all connected telnet clients
for(i = 0; i < MAX_SRV_CLIENTS; i++){
if (serverClients[i] && serverClients[i].connected()){
serverClients[i].write(sbuf, len);
delay(1);
}
}
}
}Trying repeatedly to connect prints this result:
Ready! Use 'telnet 192.168.4.1 23' to connect
New client: 0New client: 0New client: 0New client: 0
I'm trying to create some wearables that display images and/or return data to a phone based on TCP commands but have not made much progress. Can anyone tell me what I'm doing wrong?