WASPMOTE LoRa 기본 통신

WASPMOTE와 LoRa(sx1272)모듈을 통한 RX & TX test

준비물

waspmote x2

waspmote용 lora(sx1272) module x2

Antenna x2

usb A형 x2

컴퓨터 2대

waspmote receive, transmission test는 기본 예제를 통해서 수행 할 수 있다.

기본 예제는 IDE에서 바로 불러와서 수행이 가능하다.

===sx1272 Receiver code===

	/*
	* ------ [SX_02b] - RX LoRa --------
	*
	* Explanation: This example shows how to configure the semtech
	* module in LoRa mode and then receive packets with plain-text payloads
	*
	* Copyright (C) 2014 Libelium Comunicaciones Distribuidas S.L.
	* http://www.libelium.com
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*
	* Version: 0.1
	* Design: David Gascón
	* Implementation: Covadonga Albiñana, Yuri Carmona
	*/
	// Include this library for transmit with sx1272
	#include <WaspSX1272.h>
	// status variable
	int8_t e;
	void setup()
	{
	// Init USB port
	USB.ON();
	USB.println(F("SX_02b example"));
	USB.println(F("Semtech SX1272 module RX in LoRa"));
	USB.println(F("----------------------------------------"));
	USB.println(F("Setting configuration:"));
	USB.println(F("----------------------------------------"));
	// Init sx1272 module
	sx1272.ON();
	// Select frequency channel
	e = sx1272.setChannel(CH_10_868);
	USB.print(F("Setting Channel CH_10_868.\t state "));
	USB.println(e);
	// Select implicit (off) or explicit (on) header mode
	e = sx1272.setHeaderON();
	USB.print(F("Setting Header ON.\t\t state "));
	USB.println(e);
	// Select mode: from 1 to 10
	e = sx1272.setMode(1);
	USB.print(F("Setting Mode '1'.\t\t state "));
	USB.println(e);
	// Select CRC on or off
	e = sx1272.setCRC_ON();
	USB.print(F("Setting CRC ON.\t\t\t state "));
	USB.println(e);
	// Select output power (Max, High or Low)
	e = sx1272.setPower('L');
	USB.print(F("Setting Power to 'L'.\t\t state "));
	USB.println(e);
	// Select the node address value: from 2 to 255
	e = sx1272.setNodeAddress(8);
	USB.print(F("Setting Node Address to '8'.\t state "));
	USB.println(e);
	delay(1000);
	USB.println(F("----------------------------------------"));
	USB.println(F("Receiving:"));
	USB.println(F("----------------------------------------"));
	}
	void loop()
	{
	// receive packet
	e = sx1272.receivePacketTimeout(10000);
	// check rx status
	if( e == 0 )
	{
	USB.println(F("\nShow packet received: "));
	// show packet received
	sx1272.showReceivedPacket();
	}
	else
	{
	USB.print(F("\nReceiving packet TIMEOUT, state "));
	USB.println(e, DEC);
	}
	}

view raw sx1272_receiver.pde hosted with ❤ by GitHub

=======

===sx1272 Receiver code===

	/*
	* ------ [SX_02a] - TX LoRa --------
	*
	* Explanation: This example shows how to configure the semtech
	* module in LoRa mode and then send packets with plain-text payloads
	*
	* Copyright (C) 2014 Libelium Comunicaciones Distribuidas S.L.
	* http://www.libelium.com
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*
	* Version: 0.1
	* Design: David Gascón
	* Implementation: Covadonga Albiñana, Yuri Carmona
	*/
	// Include this library to transmit with sx1272
	#include <WaspSX1272.h>
	// define the destination address to send packets
	uint8_t rx_address = 8;
	// status variable
	int8_t e;
	void setup()
	{
	// Init USB port
	USB.ON();
	USB.println(F("SX_02a example"));
	USB.println(F("Semtech SX1272 module TX in LoRa"));
	USB.println(F("----------------------------------------"));
	USB.println(F("Setting configuration:"));
	USB.println(F("----------------------------------------"));
	// Init sx1272 module
	sx1272.ON();
	// Select frequency channel
	e = sx1272.setChannel(CH_10_868);
	USB.print(F("Setting Channel CH_10_868.\t state "));
	USB.println(e);
	// Select implicit (off) or explicit (on) header mode
	e = sx1272.setHeaderON();
	USB.print(F("Setting Header ON.\t\t state "));
	USB.println(e);
	// Select mode: from 1 to 10
	e = sx1272.setMode(1);
	USB.print(F("Setting Mode '1'.\t\t state "));
	USB.println(e);
	// Select CRC on or off
	e = sx1272.setCRC_ON();
	USB.print(F("Setting CRC ON.\t\t\t state "));
	USB.println(e);
	// Select output power (Max, High or Low)
	e = sx1272.setPower('L');
	USB.print(F("Setting Power to 'L'.\t\t state "));
	USB.println(e);
	// Select the node address value: from 2 to 255
	e = sx1272.setNodeAddress(2);
	USB.print(F("Setting Node Address to '2'.\t state "));
	USB.println(e);
	USB.println();
	delay(1000);
	USB.println(F("----------------------------------------"));
	USB.println(F("Sending:"));
	USB.println(F("----------------------------------------"));
	}
	void loop()
	{
	// Sending packet before ending a timeout
	e = sx1272.sendPacketTimeout( rx_address, "This_is_a_new_message");
	// Check sending status
	if( e == 0 )
	{
	USB.println(F("Packet sent OK"));
	}
	else
	{
	USB.println(F("Error sending the packet"));
	USB.print(F("state: "));
	USB.println(e, DEC);
	}
	delay(2500);
	}

view raw sx1272_transmission.pde hosted with ❤ by GitHub

=======

위 code를 각각의 waspmote에 넣고 수행하면 아래와 같은 결과가 나타난다.

===sx1272 Receiver===

===sx1272 Transmission===

각각의 수신, 송신 코드와 화면을 보면 알 수 있듯이

송신(Transmission)은 broadcast형식으로 연결이 되지 않더라도 계속 해서 packet을 날리는

모습을 볼 수 있다.

반면 수신(Receiver)의 경우 수신이 될때 까지 기다리다가 수신을 받으면

해당 구문을 print하고 다시 loop를 돌아 수신을 기다리고 있는 것을 

볼 수 있다.