AQE Sensor Interface Shield vicatcu
aqe-sensor-interface-shield / libraries / EtherCard / examples / JeeUdp / JeeUdp.ino
// Collect RF12 packets and send them on as UDP collectd packets on Ethernet.
// 2010-05-20 <jc@wippler.nl> http://opensource.org/licenses/mit-license.php
// This sketch is derived from RF12eth.pde (and etherNode.ino):
// May 2010, Andras Tucsni, http://opensource.org/licenses/mit-license.php
#include <EtherCard.h>
#include <JeeLib.h>
#include <avr/eeprom.h>
#define DEBUG 1 // set to 1 to display free RAM on web page
#define SERIAL 1 // set to 1 to show incoming requests on serial port
#define CONFIG_EEPROM_ADDR ((byte*) 0x10)
// configuration, as stored in EEPROM
struct Config {
byte band;
byte group;
byte collect;
word port;
byte valid; // keep this as last byte
} config;
// ethernet interface mac address - must be unique on your network
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };
// buffer for an outgoing data packet
static byte outBuf[RF12_MAXDATA], outDest;
static char outCount = -1;
// this buffer will be used to construct a collectd UDP packet
static byte collBuf [200], collPos;
#define NUM_MESSAGES 3 // Number of messages saved in history
#define MESSAGE_TRUNC 15 // Truncate message payload to reduce memory use
static BufferFiller bfill; // used as cursor while filling the buffer
static byte history_rcvd[NUM_MESSAGES][MESSAGE_TRUNC+1]; //history record
static byte history_len[NUM_MESSAGES]; // # of RF12 messages+header in history
static byte next_msg; // pointer to next rf12rcvd line
static word msgs_rcvd; // total number of lines received modulo 10,000
byte Ethernet::buffer[700]; // tcp/ip send and receive buffer
static void loadConfig () {
for (byte i = 0; i < sizeof config; ++i)
((byte*) &config)[i] = eeprom_read_byte(CONFIG_EEPROM_ADDR + i);
if (config.valid != 253) {
config.valid = 253;
config.band = 8;
config.group = 1;
config.collect = 1;
config.port = 25827;
}
byte freq = config.band == 4 ? RF12_433MHZ :
config.band == 8 ? RF12_868MHZ :
RF12_915MHZ;
rf12_initialize(31, freq, config.group);
}
static void saveConfig () {
for (byte i = 0; i < sizeof config; ++i)
eeprom_write_byte(CONFIG_EEPROM_ADDR + i, ((byte*) &config)[i]);
}
#if DEBUG
static int freeRam () {
extern int __heap_start, *__brkval;
int v;
return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval);
}
#endif
void setup (){
Serial.begin(57600);
Serial.println("\n[JeeUdp]");
loadConfig();
if (ether.begin(sizeof Ethernet::buffer, mymac) == 0)
Serial.println( "Failed to access Ethernet controller");
if (!ether.dhcpSetup())
Serial.println("DHCP failed");
ether.printIp("IP: ", ether.myip);
}
char okHeader[] PROGMEM =
"HTTP/1.0 200 OK\r\n"
"Content-Type: text/html\r\n"
"Pragma: no-cache\r\n"
;
static void homePage (BufferFiller& buf) {
word mhz = config.band == 4 ? 433 : config.band == 8 ? 868 : 915;
buf.emit_p(PSTR("$F\r\n"
"<title>RF12 JeeUdp</title>"
"<h2>RF12 JeeUdp @ $D - RF12 @ $D.$D</h2>"
"<a href='c'>Configure</a> - <a href='s'>Send Packet</a>"
"<h3>Last $D messages:</h3>"
"<pre>"), okHeader, config.port, mhz, config.group, NUM_MESSAGES);
for (byte i = 0; i < NUM_MESSAGES; ++i) {
byte j = (next_msg + i) % NUM_MESSAGES;
if (history_len[j] > 0) {
word n = msgs_rcvd - NUM_MESSAGES + i;
buf.emit_p(PSTR("\n$D$D$D$D: OK"), // hack, to show leading zero's
n/1000, (n/100) % 10, (n/10) % 10, n % 10);
for (byte k = 0; k < history_len[j]; ++k)
buf.emit_p(PSTR(" $D"), history_rcvd[j][k]);
}
}
long t = millis() / 1000;
word h = t / 3600;
byte m = (t / 60) % 60;
byte s = t % 60;
buf.emit_p(PSTR(
"</pre>"
"Uptime is $D$D:$D$D:$D$D"), h/10, h%10, m/10, m%10, s/10, s%10);
#if DEBUG
buf.emit_p(PSTR(" ($D bytes free)"), freeRam());
#endif
}
static int getIntArg(const char* data, const char* key, int value =-1) {
char temp[10];
if (ether.findKeyVal(data + 7, temp, sizeof temp, key) > 0)
value = atoi(temp);
return value;
}
static void configPage (const char* data, BufferFiller& buf) {
// pick up submitted data, if present
if (data[6] == '?') {
byte b = getIntArg(data, "b", 8);
byte g = getIntArg(data, "g", 1);
byte c = getIntArg(data, "c", 0);
word p = getIntArg(data, "p", 25827);
if (1 <= g && g <= 250 && 1024 <= p && p <= 30000) {
// store values as new settings
config.band = b;
config.group = g;
config.collect = c;
config.port = p;
saveConfig();
// re-init RF12 driver
loadConfig();
// clear history
memset(history_len, 0, sizeof history_len);
// redirect to the home page
buf.emit_p(PSTR(
"HTTP/1.0 302 found\r\n"
"Location: /\r\n"
"\r\n"));
return;
}
}
// else show a configuration form
buf.emit_p(PSTR("$F\r\n"
"<h3>Server node configuration</h3>"
"<form>"
"<p>"
"Freq band <input type=text name=b value='$D' size=1> (4, 8, or 9)<br>"
"Net group <input type=text name=g value='$D' size=3> (1..250)<br>"
"Collect mode: <input type=checkbox name=c value='1' $S> "
"(don't send ACKs)<br><br>"
"UDP Port <input type=text name=p value='$D' size=5> (1024..30000)"
"</p>"
"<input type=submit value=Set>"
"</form>"), okHeader, config.band, config.group,
config.collect ? "CHECKED" : "",
config.port);
}
static void sendPage (const char* data, BufferFiller& buf) {
// pick up submitted data, if present
const char* p = strstr(data, "b=");
byte d = getIntArg(data, "d");
if (data[6] == '?' && p != 0 && 0 <= d && d <= 31) {
// prepare to send data as soon as possible in loop()
outDest = d & RF12_HDR_MASK ? RF12_HDR_DST | d : 0;
outCount = 0;
// convert the input string to a number of decimal data bytes in outBuf
++p;
while (*p != 0 && *p != '&') {
outBuf[outCount] = 0;
while ('0' <= *++p && *p <= '9')
outBuf[outCount] = 10 * outBuf[outCount] + (*p - '0');
++outCount;
}
#if SERIAL
Serial.print("Send to ");
Serial.print(outDest, DEC);
Serial.print(':');
for (byte i = 0; i < outCount; ++i) {
Serial.print(' ');
Serial.print(outBuf[i], DEC);
}
Serial.println();
#endif
// redirect to home page
buf.emit_p(PSTR(
"HTTP/1.0 302 found\r\n"
"Location: /\r\n"
"\r\n"));
return;
}
// else show a send form
buf.emit_p(PSTR("$F\r\n"
"<h3>Send a wireless data packet</h3>"
"<form>"
"<p>"
"Data bytes <input type=text name=b size=50> (decimal)<br>"
"Destination node <input type=text name=d size=3> "
"(1..31, or 0 to broadcast)<br>"
"</p>"
"<input type=submit value=Send>"
"</form>"), okHeader);
}
static void collectTypeLen (word type, word len) {
len += 4;
collBuf[collPos++] = type >> 8;
collBuf[collPos++] = (byte) type;
collBuf[collPos++] = len >> 8;
collBuf[collPos++] = (byte) len;
}
static void collectStr (word type, const char* data) {
word len = strlen(data) + 1;
collectTypeLen(type, len);
strcpy((char*) collBuf + collPos, data);
collPos += len;
}
static void collectPayload (word type) {
// Copy the received RF12 data into a as many values as needed.
byte num = rf12_len / 8 + 1; // this many values will be needed
collectTypeLen(type, 2 + 9 * num);
collBuf[collPos++] = 0;
collBuf[collPos++] = num;
for (byte i = 0; i < num; ++i)
collBuf[collPos++] = 0; // counter
for (char i = 0; i < 8 * num; ++i) // include -1, i.e. the length byte
collBuf[collPos++] = i <= rf12_len ? rf12_data[i-1] : 0;
}
static void forwardToUDP () {
static byte destIp[] = { 239,192,74,66 }; // UDP multicast address
char buf[10];
collPos = 0;
collectStr(0x0000, "JeeUdp");
collectStr(0x0002, "RF12");
word mhz = config.band == 4 ? 433 : config.band == 8 ? 868 : 915;
sprintf(buf, "%d.%d", mhz, config.group);
collectStr(0x0003, buf);
collectStr(0x0004, "OK");
sprintf(buf, "%d", rf12_hdr);
collectStr(0x0005, buf);
collectPayload(0x0006);
ether.sendUdp ((char*) collBuf, collPos, 23456, destIp, config.port);
#if SERIAL
Serial.println("UDP sent");
#endif
}
void loop (){
word len = ether.packetReceive();
word pos = ether.packetLoop(len);
// check if valid tcp data is received
if (pos) {
bfill = ether.tcpOffset();
char* data = (char *) Ethernet::buffer + pos;
#if SERIAL
Serial.println(data);
#endif
// receive buf hasn't been clobbered by reply yet
if (strncmp("GET / ", data, 6) == 0)
homePage(bfill);
else if (strncmp("GET /c", data, 6) == 0)
configPage(data, bfill);
else if (strncmp("GET /s", data, 6) == 0)
sendPage(data, bfill);
else
bfill.emit_p(PSTR(
"HTTP/1.0 401 Unauthorized\r\n"
"Content-Type: text/html\r\n"
"\r\n"
"<h1>401 Unauthorized</h1>"));
ether.httpServerReply(bfill.position()); // send web page data
}
// RFM12 loop runner, don't report acks
if (rf12_recvDone() && rf12_crc == 0 && (rf12_hdr & RF12_HDR_CTL) == 0) {
history_rcvd[next_msg][0] = rf12_hdr;
for (byte i = 0; i < rf12_len; ++i)
if (i < MESSAGE_TRUNC)
history_rcvd[next_msg][i+1] = rf12_data[i];
history_len[next_msg] = rf12_len < MESSAGE_TRUNC ? rf12_len+1
: MESSAGE_TRUNC+1;
next_msg = (next_msg + 1) % NUM_MESSAGES;
msgs_rcvd = (msgs_rcvd + 1) % 10000;
if (RF12_WANTS_ACK && !config.collect) {
#if SERIAL
Serial.println(" -> ack");
#endif
rf12_sendStart(RF12_ACK_REPLY, 0, 0);
}
forwardToUDP();
}
// send a data packet out if requested
if (outCount >= 0 && rf12_canSend()) {
rf12_sendStart(outDest, outBuf, outCount, 1);
outCount = -1;
}
}