79 lines
2.6 KiB
Arduino
79 lines
2.6 KiB
Arduino
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/*
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* Copyright (c) 2013 by Felix Rusu <felix@lowpowerlab.com>
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of either the GNU General Public License version 2
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* or the GNU Lesser General Public License version 2.1, both as
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* published by the Free Software Foundation.
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*/
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// This sketch is an example of how wireless programming can be achieved with a Moteino
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// that was loaded with a custom 1k Optiboot that is capable of loading a new sketch from
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// an external SPI flash chip
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// This is the GATEWAY node, it does not need a custom Optiboot nor any external FLASH memory chip
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// (ONLY the target node will need those)
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// The sketch includes logic to receive the new sketch from the serial port (from a host computer) and
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// transmit it wirelessly to the target node
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// The handshake protocol that receives the sketch from the serial port
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// is handled by the SPIFLash/WirelessHEX69 library, which also relies on the RFM12B library
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// These libraries and custom 1k Optiboot bootloader for the target node are at: http://github.com/lowpowerlab
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#include <RFM69.h>
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#include <SPI.h>
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#include <SPIFlash.h>
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#include <WirelessHEX69.h>
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#define MYID 1 // node ID used for this unit
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#define TARGET_ID 55 // ID of node being wirelessly reprogrammed
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#define NETWORKID 250
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#define FREQUENCY RF69_915MHZ // Match this with the version of your Moteino! (others: RF69_433MHZ, RF69_868MHZ)
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#define LED 9
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#define SERIAL_BAUD 115200
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#define ACK_TIME 50 // # of ms to wait for an ack
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#define TIMEOUT 3000
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#define KEY "thisIsEncryptKey"
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RFM69 radio;
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char c = 0;
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char input[64]; //serial input buffer
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void setup(){
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Serial.begin(SERIAL_BAUD);
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radio.initialize(FREQUENCY,MYID,NETWORKID);
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//radio.encrypt(KEY); //OPTIONAL
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Serial.print("Start wireless gateway...");
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}
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void loop(){
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byte inputLen = readSerialLine(input);
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if (inputLen == 4 && input[0]=='F' && input[1]=='L' && input[2]=='X' && input[3]=='?') {
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CheckForSerialHEX((byte*)input, inputLen, radio, TARGET_ID, TIMEOUT, ACK_TIME, true);
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}
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else if (inputLen>0) { //just echo back
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Serial.print("SERIAL IN > ");Serial.println(input);
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}
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if (radio.receiveDone())
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{
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for (byte i = 0; i < radio.DATALEN; i++)
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Serial.print((char)radio.DATA[i]);
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if (radio.ACK_REQUESTED)
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{
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radio.sendACK();
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Serial.print(" - ACK sent");
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}
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Serial.println();
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}
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Blink(LED,5); //heartbeat
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}
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void Blink(byte PIN, int DELAY_MS)
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{
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pinMode(PIN, OUTPUT);
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digitalWrite(PIN,HIGH);
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delay(DELAY_MS);
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digitalWrite(PIN,LOW);
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}
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