115 lines
2.3 KiB
C++
115 lines
2.3 KiB
C++
/*
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* This sketch demonstrates how to scan WiFi networks.
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* The API is almost the same as with the WiFi Shield library,
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* the most obvious difference being the different file you need to include:
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*/
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#include <Arduino.h>
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#include <WiFiUdp.h>
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#include "ESP8266WiFi.h"
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#include "relais.h"
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#include "wlan.h"
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WiFiUDP udpServer;
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#define UDP_PORT 2703
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#define NWLANFAV 2
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const char *favorite_wlans[2*NWLANFAV] = {
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// SSID, password (NULL if open)
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"Error-403", "2b4EWWpqAyCpgOQK1oeD",
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"franken.freifunk.net", NULL
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};
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void setup_wifi()
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{
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bool connected = false;
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for(int i = 0; i < NWLANFAV; i++) {
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connected = (0 == wlan_connectto(favorite_wlans[2*i + 0], favorite_wlans[2*i + 1]));
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if(connected) {
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break;
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}
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}
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if(!connected) {
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Serial.println("All predefined WLANs failed to connect. Trying any open network.");
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connected = (0 == wlan_connect_any_open());
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}
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if(connected) {
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wlan_print_conninfo();
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} else {
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Serial.println("All WLAN connections failed. Giving up for now.");
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}
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}
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void setup()
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{
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Serial.begin(115200);
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setup_wifi();
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relais_setup();
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Serial.print("starting UDP server on port ");
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Serial.println(UDP_PORT);
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if(!udpServer.begin(UDP_PORT)) {
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Serial.println("UDP server start FAILED!");
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}
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Serial.println("Setup done");
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}
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void loop()
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{
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char buf[512];
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if(WiFi.status() != WL_CONNECTED) {
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// wifi disconnected -> attempt reconnect
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delay(5000);
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setup_wifi();
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}
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/*int n = udpServer.read(buf, 512);
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if(n > 0) {
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Serial.print("Received UDP packet with ");
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Serial.print(n);
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Serial.println(" bytes.");
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}*/
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// if there's data available, read a packet
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int packetSize = udpServer.parsePacket();
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if(packetSize)
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{
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Serial.print("Received packet of size ");
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Serial.println(packetSize);
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Serial.print("From ");
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IPAddress remoteIp = udpServer.remoteIP();
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Serial.print(remoteIp);
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Serial.print(", port ");
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Serial.println(udpServer.remotePort());
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// read the packet into packetBufffer
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int len = udpServer.read(buf,512);
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if (len >0) buf[len]=0;
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/*
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Serial.println("Contents:");
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Serial.println(buf);
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*/
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// send a reply, to the IP address and port that sent us the packet we received
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udpServer.beginPacket(udpServer.remoteIP(), udpServer.remotePort());
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udpServer.write("OK\n");
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udpServer.endPacket();
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}
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relais_loop();
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}
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