Scratch

void setup() {
	/*** SETUP section */
	tx_busy = false;

	// the twelite main class
	the_twelite
		<< TWENET::appid(APP_ID)    // set application ID (identify network group)
		<< TWENET::channel(CHANNEL) // set channel (pysical channel)
		<< TWENET::rx_when_idle();  // open receive circuit (if not set, it can't listen packts from others)

	// Register Network
	auto&& nwk = the_twelite.network.use<NWK_SIMPLE>();
	nwk	<< NWK_SIMPLE::logical_id(0xFE); // set Logical ID. (0xFE means a child device with no ID)

	/*** BEGIN section */
	Buttons.begin(pack_bits(PIN_BTN), 5, 10); // check every 10ms, a change is reported by 5 consequent values.

	the_twelite.begin(); // start twelite!

	/*** INIT message */
	Serial << "--- Scratch act ---" << mwx::crlf;
}

the_twelite.begin(); // start twelite!

void begin() {
	Serial << "..begin (run once at boot)" << mwx::crlf;
}

if (Buttons.available()) {
	uint32_t bm, cm;
	Buttons.read(bm, cm);

	if (cm & 0x80000000) {
		// the first capture.
	}

	Serial << int(millis()) << ":BTN" << format("%b") << mwx::crlf;
}

while(Serial.available()) {
  int c = Serial.read();

	Serial << '[' << char(c) << ']';

  switch(c) {
  case 'p': ... // millis() を表示
  case 't': ... // 無線パケットを送信 (vTransmit)
        if (!tx_busy) {
					tx_busy = Transmit();
					if (tx_busy) {
						Serial  << int(millis()) << ":tx request success! (" 
										<< int(tx_busy.get_value()) << ')' << mwx::crlf;
 					} else {
						Serial << int(millis()) << ":tx request failed" << mwx::crlf;;
					}
				}
  case 's': ... // スリープする
				Serial << int(millis()) << ":sleeping for " << 5000 << "ms" << mwx::crlf << mwx::flush;
				the_twelite.sleep(5000);
				break;
  }
}

the_twelite.sleep(5000);

void wakeup() {
	Serial << int(millis()) << ":wake up!" << mwx::crlf;
}

MWX_APIRET Transmit() {
	Serial << int(millis()) << ":Transmit()" << mwx::crlf;

	if (auto&& pkt = the_twelite.network.use<NWK_SIMPLE>().prepare_tx_packet()) {
		// set tx packet behavior
		pkt << tx_addr(0xFF)  // 同報通信＝ブロードキャスト
			<< tx_retry(0x1)    // 再送１回
			<< tx_packet_delay(100,200,20); // 送信時遅延100-200msの間に送信、再送間隔20ms

		// 送信データの指定（アプリケーションごとに決める）
		pack_bytes(pkt.get_payload()
			, make_pair("SCRT", 4) // ４文字識別子
			, uint32_t(millis())   // タイムスタンプ
		);
		
		// 送信要求を行う
		return pkt.transmit(); 
	} else {
		// .prepare_tx_packet() 時点で失敗している(送信キューが一杯)
		Serial << "TX QUEUE is FULL" << mwx::crlf;
	  return MWX_APIRET(false, 0);
	}
}

void on_tx_comp(mwx::packet_ev_tx& ev, bool_t &b_handled) {
	Serial 	<< int(millis()) << ":tx completed!"
			<< format("(id=%d, stat=%d)", ev.u8CbId, ev.bStatus) << mwx::crlf;
	tx_busy = false; // clear tx busy flag.
}

void on_rx_packet(packet_rx& rx, bool_t &handled) {
	Serial << format("rx from %08x/%d", 
					rx.get_addr_src_long(), rx.get_addr_src_lid()) << mwx::crlf;
}