Nanode Pachube with Watchdog

// Simple demo for feeding some random data to Pachube.
// Based on pachube.pde 2011-07-08 <jcw@equi4.com>
// Created by <maniacbug@ymail.com>

// This has been tested with EtherCard rev 7752
#include <EtherCard.h>
#include <CmdMessenger.h>
#include <Base64.h>
#include <Streaming.h>
#include <avr/wdt.h>

// change these settings to match your own setup
#define FEED    "34843"
#define APIKEY  "JHhghggffgfgg6rF5rfdtrtfytY"

// On Nanode, this will get the MAC from the 11AA02E48 chip
byte mymac[6];

// Static IP configuration to use if no DHCP found
// Change these to match your site setup
static byte static_ip[] = { 192,168,1,91 };
static byte static_gw[] = { 192,168,1,1 };
static byte static_dns[] = { 192,168,1,99 };

char website[] PROGMEM = "api.pachube.com";
char field_separator = ',';
char command_separator = ';';

int mcount, tvalue, sd1, sd1a, sd2, sd2a;
double sd6, sd7;
float sd3, sd4, sd5, sd8=0.0;  //floats because data is to ? decimal places
int tol=5;  //update frequency tolerance, either up or down 5Watts triggers an update
//------------------------------------------------------------
// Timing Variables
//------------------------------------------------------------
unsigned long timerDelay=840000UL;  // Updates Pachube every 14 mins max to prevent freezing
unsigned long LEDDelay=500;
unsigned long prevMillis=0UL;

byte Ethernet::buffer[512];
uint32_t timer;
Stash stash;

void printf_begin(void);
void read_MAC(byte*);

//------------Command Messenger------------------//

// Attach a new CmdMessenger object to the default Serial port
CmdMessenger cmdMessenger = CmdMessenger(Serial, field_separator, command_separator);

enum
{
  kCOMM_ERROR    = 000, // Lets Arduino report serial port comm error back to the PC (only works for some comm errors)
  kACK           = 001, // Arduino acknowledges cmd was received
  kARDUINO_READY = 002, // After opening the comm port, send this cmd 02 from PC to check arduino is ready
  kERR           = 003, // Arduino reports badly formatted cmd, or cmd not recognised

  kSEND_CMDS_END, // Mustnt delete this line
};

messengerCallbackFunction messengerCallbacks[] =
{
  Arduino_msg,            // 004 in this example
  NULL
};

void Arduino_msg()
{
  cmdMessenger.sendCmd(kACK,"command recieved");
  mcount = 0;
  while ( cmdMessenger.available() )
  {
    char buf[350] = { '\0' };
    cmdMessenger.copyString(buf, 350);

    mcount = mcount+1 ;
    tvalue = atoi(buf);
    if (mcount == 1) {
     sd1 = (tvalue); }
      else if (mcount == 2) {
       sd2 = (tvalue); }
        else if (mcount == 3) {
         sd3 = (tvalue); }
          else if (mcount == 4) {
           sd4 = (tvalue); }
            else if (mcount == 5) {
             sd5 = (tvalue); }
              else if (mcount == 6) {
               sd6 = (tvalue); }
                else if (mcount == 7) {
                 sd7 = (tvalue); }
                  else if (mcount == 8) {
                   sd8 = (tvalue); }
    if(buf[0])
      cmdMessenger.sendCmd(kACK, buf);
   }
}

void arduino_ready()
{
  // In response to ping. We just send a throw-away Acknowledgement to say "im alive"
  cmdMessenger.sendCmd(kACK,"Arduino ready");
}

void unknownCmd()
{
  // Default response for unknown commands and corrupt messages
  cmdMessenger.sendCmd(kERR,"Unknown command");
}

void attach_callbacks(messengerCallbackFunction* callbacks)
{
  int i = 0;
  int offset = kSEND_CMDS_END;
  while(callbacks[i])
  {
    cmdMessenger.attach(offset+i, callbacks[i]);
    i++;
  }
}
//end of CmdMessenger code

void setup () {
  pinMode(6, OUTPUT);  //Onboard LED

  Serial.begin(9600);

  printf_begin();
  printf_P(PSTR("\nEtherCard/examples/nanode_pachube\n\r"));

  // Fetch the MAC address -- Nanode-specific
  read_MAC(mymac);

  printf_P(PSTR("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n\r"),
      mymac[0],
      mymac[1],
      mymac[2],
      mymac[3],
      mymac[4],
      mymac[5]
  );

  if (ether.begin(sizeof Ethernet::buffer, mymac) == 0)
    printf_P(PSTR( "Failed to access Ethernet controller\n\r"));
  if (!ether.dhcpSetup())
  {
    printf_P(PSTR("DHCP failed, using static configuration\n\r"));
    ether.staticSetup(static_ip, static_gw);
    ether.copyIp(ether.dnsip, static_dns);
  }

  ether.printIp("IP:  ", ether.myip);
  ether.printIp("GW:  ", ether.gwip);
  ether.printIp("DNS: ", ether.dnsip);

  if (!ether.dnsLookup(website))
    printf_P(PSTR("DNS failed\n\r"));

  ether.printIp("SRV: ", ether.hisip);

  //----------Start of CmdMessenger----------//
  cmdMessenger.print_LF_CR();   // Make output more readable whilst debugging in Arduino Serial Monitor
  cmdMessenger.attach(kARDUINO_READY, arduino_ready);
  cmdMessenger.attach(unknownCmd);
  attach_callbacks(messengerCallbacks);
  arduino_ready();
  //----------End of CmdMessenger----------//

  wdt_enable(WDTO_8S);  //Set up the watchdog timer. If it isn't reset every 8 seconds, the arduino will reset
}

void loop () {
  wdt_reset();  //Reset the watchdog

  //check if timer has reset (after 49 days...)
  if (prevMillis > millis()) {
    prevMillis = 0;  }

  cmdMessenger.feedinSerialData(); //CmdMessenger

  ether.packetLoop(ether.packetReceive());

  //------------------------------
  // SEND DATA TO PACHUBE
  //------------------------------

  // blink onboard LED to show IF statement is true (Pin 6 on Nanode)
  if ((millis() - prevMillis) > (LEDDelay)) {
    digitalWrite(6, HIGH); } // turns LED off

  // check if new data has arrived...
    if ((sd1 >(sd1a + tol)) || (sd1 <(sd1a - tol)) || (sd2 >(sd2a + tol)) || (sd2 <(sd2a - tol)) || ((millis() - prevMillis) > (timerDelay)))  {
    digitalWrite(6, LOW); //turns onboard LED on if IF statement true

    // reset the indicators to current values
    sd1a = sd1;
    sd2a = sd2;
    prevMillis=millis();

    printf_P(PSTR("Sending...\n\r"));

    byte sd = stash.create();
    stash.print("sd1,");
    stash.println((word) sd1);
    stash.print("sd2,");
    stash.println((word) sd2);
    stash.print("sd3,");
    stash.println((word) sd3 / 1000.0, 3);
    stash.print("sd4,");
    stash.println((word) sd4 / 1000.0, 3);
    stash.print("sd5,");
    stash.println((word) sd5 / 1000.0, 3);
    stash.print("sd6,");
    stash.println((word) sd6);
    stash.print("sd7,");
    stash.println((word) sd7);
    stash.print("sd8,");
    stash.println((sd8 / 100.0) - 50.0);
    //stash.println((word) sd8);
    stash.save();

    // generate the header with payload - note that the stash size is used,
    // and that a "stash descriptor" is passed in as argument using "$H"
    Stash::prepare(PSTR("PUT http://$F/v2/feeds/$F.csv HTTP/1.0" "\r\n"
                        "Host: $F" "\r\n"
                        "X-PachubeApiKey: $F" "\r\n"
                        "Content-Length: $D" "\r\n"
                        "\r\n"
                        "$H"),
            website, PSTR(FEED), website, PSTR(APIKEY), stash.size(), sd);

    // send the packet - this also releases all stash buffers once done
    ether.tcpSend();

    //Watchdog reboot every hour
    if (millis() > 3600000L) {
    delay (10000); }
  }
}

int serial_putc( char c, FILE * )
{
  Serial.write( c );
  return c;
}

void printf_begin(void)
{
  fdevopen( &serial_putc, 0 );
}

// Nanode_MAC
// Rufus Cable, June 2011 (threebytesfull)

// Sample code to read the MAC address from the 11AA02E48 on the
// back of the Nanode V5 board.

// This code is hacky and basic - it doesn't check for bus errors
// and will probably fail horribly if it's interrupted. It's best
// run in setup() - fetch the MAC address once and keep it. After
// the address is fetched, it puts the chip back in standby mode
// in which it apparently only consumes 1uA.

// Feel free to reuse this code - suggestions for improvement are
// welcome! :)

// http://ww1.microchip.com/downloads/en/DeviceDoc/DS-22067H.pdf
// http://ww1.microchip.com/downloads/en/devicedoc/22122a.pdf

// Nanode has UNI/O SCIO on PD7

#define D7_ON  _BV(7)
#define D7_OFF (~D7_ON)

#define SCIO_HIGH PORTD |= D7_ON
#define SCIO_LOW  PORTD &= D7_OFF

#define SCIO_OUTPUT DDRD |= D7_ON
#define SCIO_INPUT  DDRD &= D7_OFF

#define SCIO_READ ((PIND & D7_ON) != 0)

#define WAIT_QUARTER_BIT delayMicroseconds(9);
#define WAIT_HALF_BIT delayMicroseconds(20);

#define NOP PORTD &= 0xff

// Fixed Timings
// standby pulse time (600us+)
#define UNIO_TSTBY_US 600
// start header setup time (10us+)
#define UNIO_TSS_US 10
// start header low pulse (5us+)
#define UNIO_THDR_US 6

// SCIO Manipulation macros
#define BIT0 SCIO_HIGH;WAIT_HALF_BIT;SCIO_LOW;WAIT_HALF_BIT;
#define BIT1 SCIO_LOW;WAIT_HALF_BIT;SCIO_HIGH;WAIT_HALF_BIT;

// 11AA02E48 defines
#define DEVICE_ADDRESS 0xA0
#define READ_INSTRUCTION 0x03

// Where on the chip is the MAC address located?
#define CHIP_ADDRESS 0xFA

inline bool unio_readBit()
{
  SCIO_INPUT;
  WAIT_QUARTER_BIT;
  bool value1 = SCIO_READ;
  WAIT_HALF_BIT;
  bool value2 = SCIO_READ;
  WAIT_QUARTER_BIT;
  return (value2 && !value1);
}

void unio_standby() {

  SCIO_OUTPUT;
  SCIO_HIGH;
  delayMicroseconds(UNIO_TSTBY_US);
}

void unio_sendByte(byte data) {

  SCIO_OUTPUT;
  for (int i=0; i<8; i++) {
    if (data & 0x80) {
      BIT1;
    } else {
      BIT0;
    }
    data <<= 1;
  }
  // MAK
  BIT1;
  // SAK?
  /*bool sak =*/ unio_readBit();
}

void unio_readBytes(byte *addr, int length) {
  for (int i=0; i<length; i++) {

    byte data = 0;
    for (int b=0; b<8; b++) {
      data = (data << 1) | (unio_readBit() ? 1 : 0);
    }
    SCIO_OUTPUT;
    if (i==length-1) {
      BIT0; // NoMAK
    } else {
      BIT1; // MAK
    }
    /*bool sak =*/ unio_readBit();
    addr[i] = data;
  }
}

void unio_start_header() {
  SCIO_LOW;
  delayMicroseconds(UNIO_THDR_US);
  unio_sendByte(B01010101);
}

void read_MAC(byte* mac_address) {

  // no interrupts!
  cli();

  // standby
  unio_standby();

  // start header
  unio_start_header();

  unio_sendByte(DEVICE_ADDRESS);
  unio_sendByte(READ_INSTRUCTION);
  unio_sendByte(CHIP_ADDRESS >> 8);
  unio_sendByte(CHIP_ADDRESS & 0xff);

  // read 6 bytes
  unio_readBytes(mac_address, 6);

  // back to standby
  unio_standby();

  // interrupts ok now
  sei();
}

// vim:ai:cin:sts=2 sw=2 ft=cpp