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PixelHub/PixelHub-Client/PixelHub-Client.ino

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/*
* Connecting to a WiFi network with WPA
************************************************
* Originally adapted from https://www.arduino.cc/en/Tutorial/ConnectWithWPA
* by Starbeamrainbowlabs
*/
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include "Utilities.h"
2016-10-16 14:22:05 +00:00
char ssid[] = "evenstar-2.4";
char password[] = "***REMOVED***";
// The address that the PixelHub beacon is broadcasting on.
IPAddress beaconAddress(239, 62, 148, 30);
// The port number that the PixelHub beacon is broadcasting on.
unsigned int beaconPort = 5050;
// A UDP Client to allow us to recieve UDP datagrams.
WiFiUDP UdpClient;
// The size of the datagram buffer that is used to buffer incoming messages.
int datagramBufferSize = 256;
void setup()
{
// Setup the serial connection
Serial.begin(4800);
Serial.println("Hello, world!");
Serial.println("Beginning connection sequence.");
Serial.print("Attempting to connect to ");
Serial.print(ssid);
Serial.print(" - ");
WiFi.begin(ssid, password);
while(WiFi.status() != WL_CONNECTED)
{
// Wait 10 seconds for the connection to start
delay(10000);
}
Serial.println("success!");
printWiFiInfoLocal();
findServer();
}
void loop()
{
}
void printWiFiInfoLocal()
{
Serial.print("IP Address: ");
Serial.println(WiFi.localIP());
}
void findServer()
{
Serial.print("Initialising PixelHub auto detection system - ");
byte datagramBuffer[datagramBufferSize];
UdpClient.beginMulticast(WiFi.localIP(), beaconAddress, beaconPort);
Serial.println("success!");
Serial.println("Listening for PixelHub beacon pings.");
while(true) {
int datagramSize = UdpClient.parsePacket();
if(!datagramSize) continue;
Serial.print("Received datagram #");
Serial.print(datagramSize);
Serial.print(" bytes in size from ");
Serial.print(UdpClient.remoteIP());
Serial.print(":");
Serial.print(UdpClient.remotePort());
if(datagramSize > datagramBufferSize) {
Serial.println(", but the message is larger than the datagram buffer size.");
continue;
}
Serial.println(".");
UdpClient.read(datagramBuffer, datagramSize);
Serial.print("Content as hex: ");
for(int i = 0; i < datagramSize; i++) {
Serial.print(datagramBuffer[i], HEX);
Serial.print(" ");
}
Serial.println();
Serial.print("Raw content: ");
Serial.write(datagramBuffer, datagramSize);
Serial.println();
Serial.print("Parsing datagram - ");
// Parse the recieved message
char* datagramStr = (char*)datagramBuffer;
// Find the positions of the key characters
int atPos = findChar(datagramStr, '@');
int colonPos = findChar(datagramStr, ':');
char* role;
char* serverIp;
char* portNumberText;
strncpy(role, datagramStr, atPos);
strncpy(serverIp, datagramStr + atPos + 1, colonPos);
strncpy(portNumberText, datagramStr + colonPos + 1, datagramSize - 1);
Serial.println("complete.");
Serial.print("Role: "); Serial.print(role); Serial.print(" ");
Serial.print("Remote IP: "); Serial.print(serverIp); Serial.print(" ");
Serial.print("Port number: "); Serial.print(portNumberText);
Serial.println();
// If the advertiser isn't playing the role of a server, then we're not interested
if(role != "server") continue;
int portNumber = atoi(portNumberText);
}
}