opportunistic-xbee/node/main/main.ino

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#include <Wire.h>
#include "lcd.h"
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#include "packet.h" // Packet
#include "xbee_wrapper.h" // WBeeWrapper
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// Peripherals
LCDWrapper screen = LCDWrapper(0x20, 16, 2);
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XBeeWrapper xbee = XBeeWrapper();
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// ACTUAL DATA
uint8_t wave_id = 255; // last wave
uint8_t dist = 255; // actual distance
Packet recv, send;
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void setup() {
Serial.begin(38400);
Serial.println("+ ready");
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screen.begin();
screen.printf("[ node ready ]");
xbee.begin(38400);
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}
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void loop() {
// 1. ignore if no received data
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if( xbee.receive(recv) != XBWRECV_OK )
return;
uint8_t opcode = recv.getOpcode();
// DISCOVER REQUEST
if( opcode == 0 ) {
// security
if( recv.getDist() == 0 && recv.getSender() != 255 )
return;
screen.printfn(0, "dsc[%3d] %3d / %3d", recv.getSender(), recv.getDist(), recv.getWave());
// ignore if same wave
if( recv.getWave() == wave_id ){
screen.printfn(1, "x");
return;
}
// update features
wave_id = recv.getWave();
dist = recv.getDist()+1;
// propagate wave
send.setOpcode(0);
send.setWave(wave_id);
send.setDist(dist);
send.setSender(42);
screen.printfn(1, "dsc[%3d] %3d / %3d", send.getSender(), send.getDist(), send.getWave());
xbee.broadcast(send);
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// MESSAGE DATA
} else {
screen.clear();
screen.printfn(0, "msg[%3d/%3d] %3d", recv.getDist(), recv.getTTL(), recv.getSize());
delay(500);
screen.printfn_overflow(0, "%s", recv.getData());
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// ignore
if( recv.getTTL() <= 0 || recv.getDist() > dist ){
screen.printfn(1, "x");
return;
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}
// propagation
send.setOpcode(1);
send.setTTL(recv.getTTL()-1);
send.setDist(dist);
send.setData(recv.getData(), recv.getSize());
screen.printfn(1, "msg[%3d/%3d] %3d", send.getDist(), send.getTTL(), send.getSize());
xbee.broadcast(send);
}
}