104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/*
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WiFiTelnetToSerial - Example Transparent UART to Telnet Server for ESP32
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Copyright (c) 2017 Hristo Gochkov. All rights reserved.
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This file is part of the ESP32 WiFi library for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <WiFi.h>
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#include <WiFiMulti.h>
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WiFiMulti wifiMulti;
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//how many clients should be able to telnet to this ESP32
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#define MAX_SRV_CLIENTS 1
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const char* ssid = "Derpina";
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const char* password = "randomsharedkey1";
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WiFiServer server(23);
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WiFiClient serverClients[MAX_SRV_CLIENTS];
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void setup() {
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Serial.begin(115200);
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Serial.println("\nConnecting");
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wifiMulti.addAP(ssid, password);
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wifiMulti.addAP("ssid_from_AP_2", "your_password_for_AP_2");
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wifiMulti.addAP("ssid_from_AP_3", "your_password_for_AP_3");
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Serial.println("Connecting Wifi ");
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for (int loops = 10; loops > 0; loops--) {
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if (wifiMulti.run() == WL_CONNECTED) {
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Serial.println("");
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Serial.print("WiFi connected ");
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Serial.print("IP address: ");
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Serial.println(WiFi.localIP());
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break;
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}
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else {
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Serial.println(loops);
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delay(1000);
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}
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}
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if (wifiMulti.run() != WL_CONNECTED) {
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Serial.println("WiFi connect failed");
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delay(1000);
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ESP.restart();
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}
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//start UART and the server
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server.begin();
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server.setNoDelay(true);
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Serial.print("Ready! Use 'telnet ");
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Serial.print(WiFi.localIP());
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Serial.println(" 23' to connect");
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}
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int testval=0;
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void loop() {
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testval=testval+1;
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uint8_t i;
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Serial.println(testval);
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if (wifiMulti.run() == WL_CONNECTED) {
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//check if there are any new clients
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if (server.hasClient()){
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for(i = 0; i < MAX_SRV_CLIENTS; i++){
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//find free/disconnected spot
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if (!serverClients[i] || !serverClients[i].connected()){
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if(serverClients[i]) serverClients[i].stop();
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serverClients[i] = server.available();
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if (!serverClients[i]) Serial.println("available broken");
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Serial.print("New client: ");
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Serial.print(i); Serial.print(' ');
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Serial.println(serverClients[i].remoteIP());
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break;
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server.print(Serial.read());
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}
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}
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if (i >= MAX_SRV_CLIENTS) {
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//no free/disconnected spot so reject
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server.available().stop();
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}
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}
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}
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else {
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Serial.println("WiFi not connected!");
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for(i = 0; i < MAX_SRV_CLIENTS; i++) {
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if (serverClients[i]) serverClients[i].stop();
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}
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delay(1000);
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}
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}
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