/**
* collectd - src/ted.c
- * Copyright (C) 2005,2006 Peter Holik
+ * Copyright (C) 2009 Eric Reed
*
* 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
* Eric Reed <ericr at reedhome.net>
*
* This is a collectd module for The Energy Detective: A low-cost whole
- * house energy monitoring system. For more information on TED, see
+ * house energy monitoring system. For more DEBUGrmation on TED, see
* http://theenergydetective.com
*
* This module was not created by Energy, Inc. nor is it supported by
- * them in any way. It was created using information from two sources:
+ * them in any way. It was created using DEBUGrmation from two sources:
* David Satterfield's TED module for Misterhouse, and Micah Dowty's TED
* Python Module.
*
-#define LINE_LENGTH 282
-#define PKT_REQUEST "\xAA"
+#define PKT_LENGTH 278
+#define MAX_PKT 300
#define ESCAPE 0x10
#define PKT_BEGIN 0x04
#define PKT_END 0x03
-#define DEFAULT_DEVICE "/dev/ttyUSB"
-#define CLIENT_LIST_PREFIX "CLIENT_LIST,"
+#define DEFAULT_DEVICE "/dev/ttyUSB "
static char *device = NULL;
static int fd = -1;
static const char *config_keys[] = { "Device" };
static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
-
-
-
-static int ted_read_value(double *kv, double *voltage)
+static int ted_read_value(double *kw, double *voltage)
{
- int retry = 3; /* sometimes we receive garbadge */
-
- do
- {
- struct timeval time_end;
-
- tcflush(fd, TCIFLUSH);
-
- if (gettimeofday (&time_end, NULL) < 0)
- {
- char errbuf[1024];
- ERROR ("ted plugin: gettimeofday failed: %s",
- sstrerror (errno, errbuf,
- sizeof (errbuf)));
- return (-1);
- }
- time_end.tv_sec++;
-
- while (1)
- {
- unsigned char buf[4096];
- unsigned char package_buffer[4096];
- char sResultByte;
- char sCmd[1];
- int status;
- int byte;
- int package_length=-1;
- int start_flag=0;
- int escape_flag=0;
- struct timeval timeout;
- struct timeval time_now;
- sCmd[0] = 0xAA;
-
- status = write (fd, sCmd, 1);
- INFO ("status of write %d",status);
- if (status < 0)
- {
- ERROR ("ted plugin: swrite failed.");
- return (-1);
- }
-
-
- if (gettimeofday (&time_now, NULL) < 0)
- {
- char errbuf[1024];
- ERROR ("ted plugin: "
- "gettimeofday failed: %s",
- sstrerror (errno, errbuf,
- sizeof (errbuf)));
- return (-1);
- }
- /*if (timeval_cmp (time_end, time_now, &timeout) < 0)
- break; */
-
- usleep(700000);
- status = select(fd+1, NULL, NULL, NULL, &timeout);
- INFO ("status 1 %d",status);
- status = 1;
-
-
-
- if (status > 0) /* usually we succeed */
- {
- status = read(fd, buf, 4096);
- INFO ("status of read %d",status);
-
- if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
- continue;
-
- for (byte=0; byte< status; byte++) {
- sResultByte = buf[byte];
- if (escape_flag) {
- escape_flag = 0;
- if ((sResultByte==ESCAPE) & (package_length > 0)){
- package_buffer[package_length] = ESCAPE;
- package_length++;
- }
- else if (sResultByte==PKT_BEGIN){
- start_flag = 1;
- package_length=0;
- }
- else if (sResultByte==PKT_END){
- package_buffer[package_length] = '\0';
- package_length++;
- }
- }
- else if (sResultByte == ESCAPE)
- escape_flag = 1;
- else if (package_length >= 0){
- package_buffer[package_length] = sResultByte;
- package_length++;
- }
-
- }
-
- INFO ("read package_length %d",package_length);
+ unsigned char sResult[MAX_PKT];
+ unsigned char package_buffer[MAX_PKT];
+ char sResultByte;
+ int status;
+ int byte;
+ int package_length;
+ int escape_flag;
+ int end_flag;
+ int sResultnum;
+ struct timeval timeout;
+ char pkt_request[1] = {0xAA};
+ fd_set input;
+
+ int retry = 3; /* sometimes we receive garbadge */
+
+/* Initialize the input set*/
+ FD_ZERO(&input);
+ FD_SET(fd, &input);
+/* Initialize timout structure, set to 1 second */
+
+
+ do
+ {
+ timeout.tv_sec = 2;
+ timeout.tv_usec = 0;
+ escape_flag = 0;
+ end_flag = 0;
+ package_length = 0;
+ // clear out anything in the buffer
+ tcflush(fd, TCIFLUSH);
+
+ status = write (fd, pkt_request,sizeof(pkt_request));
+ DEBUG ("status of write %d",status);
+ if (status < 0)
+ {
+ ERROR ("ted plugin: swrite failed.");
+ return (-1);
+ }
+
+
+/* Loop until we find the end of the package */
+ while (end_flag == 0)
+ {
+/* check for timeout or input error*/
+ status = select(fd+1, &input, NULL, NULL, &timeout);
+ if (status == 0) /* Timeout */
+ {
+ INFO ("Timeout");
+ break;
+ }
+ else if ((status == -1) && ((errno == EAGAIN) || (errno == EINTR)))
+ {
+ DEBUG ("Not Ready");
+ continue;
+ }
+ else if (status == -1)
+ {
+ char errbuf[1024];
+ ERROR ("ted plugin: select failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ break;
+ }
+
+ else
+ {
+/* find out how may bytes are in the input buffer*/
+ ioctl(fd, FIONREAD, &byte);
+ DEBUG ("bytes in buffer %d",byte);
+ if (byte <= 0)
+ {
+ continue;
+ }
+ // Read input buffer
+ sResultnum = read(fd, sResult, MAX_PKT);
+ DEBUG ("bytes read %d",sResultnum);
+
+ //
+ // packet filter loop
+ //
+ for (byte=0; byte< sResultnum; byte++)
+ {
+ sResultByte = sResult[byte];
+ // was byte before escape
+ if (escape_flag == 1)
+ {
+ escape_flag = 0;
+ // escape escape = single escape
+ if ((sResultByte==ESCAPE) & (package_length > 0))
+ {
+ package_buffer[package_length] = ESCAPE;
+ package_length++;
+ }
+ else if (sResultByte==PKT_BEGIN)
+ {
+ package_length=0;
+ }
+ else if (sResultByte==PKT_END)
+ {
+ end_flag = 1;
+ break;
+ }
+ }
+ else if (sResultByte == ESCAPE)
+ {
+ escape_flag = 1;
+ }
+ // if we are in a package add byte to buffer
+ // otherwise throw away
+ else if (package_length >= 0)
+ {
+ package_buffer[package_length] = sResultByte;
+ package_length++;
+ }
+ }
+ }
+ }
+ DEBUG ("read package_length %d",package_length);
- if (package_length == 279)
- {
- *kv = ((package_buffer[248] * 256) + package_buffer[247])*10.0;
- INFO ("kv %f",*kv);
- *voltage = ((package_buffer[252] * 256) + package_buffer[251])/10.0;
- INFO ("voltage %f",*voltage);
- return (0); /* value received */
- }
- else
- INFO ("Not the correct package");
- usleep(700000);
- continue;
- //return (-1); /* Not pro package */
- }
- else if (!status) /* Timeout */
- {
- break;
- }
- else if ((status == -1) && ((errno == EAGAIN) || (errno == EINTR)))
- {
- usleep(700000);
- continue;
- }
- else /* status == -1 */
- {
- char errbuf[1024];
- ERROR ("ted plugin: "
- "select failed: %s",
- sstrerror (errno, errbuf, sizeof (errbuf)));
- break;
- }
- }
- } while (--retry);
-
- return (-2); /* no value received */
+ if (package_length != PKT_LENGTH)
+ {
+ INFO ("Not the correct package");
+ // delay until next package is loaded into TED
+ // TED is updated once per second
+ usleep (1000000);
+ continue;
+ }
+ //part of the DEBUG in the package
+ //get KiloWatts at char 247 and 248
+ //get Voltage at char 251 and 252
+ *kw = ((package_buffer[248] * 256) + package_buffer[247])*10.0;
+ DEBUG ("kw %f",*kw);
+ *voltage = ((package_buffer[252] * 256) + package_buffer[251])/10.0;
+ DEBUG ("voltage %f",*voltage);
+ return (0); /* value received */
+
+
+ } while (--retry);
+
+ return (-2); /* no value received */
} /* int ted_read_value */
static int ted_init (void)
{
int i;
- int status;
- //char device[] = "/dev/ttyUSB ";
- char sCmd[1];
-
- char buf[4096];
- sCmd[0] = 0xAA;
+ double kw;
+ double voltage;
if (device == NULL)
+ {
device = DEFAULT_DEVICE;
+ }
for (i = 0; i < 10; i++)
{
- device[strlen(device)-1] = i + '0';
-
- if ((fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK)) > 0)
- {
- struct termios options;
- // Get the current options for the port...
- tcgetattr(fd, &options);
- options.c_cflag = B19200 | CS8 | CSTOPB | CREAD | CLOCAL;
- options.c_iflag = IGNBRK | IGNPAR;
- options.c_oflag = 0;
- options.c_lflag = 0;
- options.c_cc[VTIME] = 3;
- options.c_cc[VMIN] = 50;
-
- // Set the new options for the port...
- tcflush(fd, TCIFLUSH);
- tcsetattr(fd, TCSANOW, &options);
-
- status = swrite (fd, sCmd, 1);
- if (status < 0)
- continue;
- usleep(900000);
- status = read(fd, buf, 4096);
- if (status < 0)
- continue;
- INFO ("status of read %d",status);
- INFO ("length of read %d", strlen(buf));
-
- INFO ("ted plugin: Device "
- "found at %s", device);
- return (0);
-
- }
+ device[strlen(device)-1] = i + '0';
+
+ if ((fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK)) <= 0)
+ {
+ DEBUG ("No device at fd %d", fd);
+ close (fd);
+ continue;
+ }
+ struct termios options;
+ // Get the current options for the port...
+ tcgetattr(fd, &options);
+ options.c_cflag = B19200 | CS8 | CSTOPB | CREAD | CLOCAL;
+ options.c_iflag = IGNBRK | IGNPAR;
+ options.c_oflag = 0;
+ options.c_lflag = 0;
+ options.c_cc[VTIME] = 20;
+ options.c_cc[VMIN] = 250;
+
+ // Set the new options for the port...
+ tcflush(fd, TCIFLUSH);
+ tcsetattr(fd, TCSANOW, &options);
+
+ if (ted_read_value (&kw,&voltage) != 0)
+ {
+ DEBUG ("No device at fd %d", fd);
+ close (fd);
+ continue;
+ }
+
+ INFO ("ted plugin: Device found at %s", device);
+ return (0);
}
ERROR ("ted plugin: No device found");
vl.values_len = 1;
sstrncpy (vl.host, hostname_g, sizeof (vl.host));
sstrncpy (vl.plugin, "ted", sizeof (vl.plugin));
+ sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
sstrncpy (vl.type, "ted", sizeof (vl.type));
- sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
plugin_dispatch_values (&vl);
}
static int ted_config (const char *key, const char *value)
{
- if (strcasecmp ("Device", key) == 0)
- {
- sfree (device);
- device = sstrdup (value);
- }
- else
+ if (strcasecmp ("Device", key) != 0)
{
return (-1);
- }
+ }
+
+ sfree (device);
+ device = sstrdup (value);
return (0);
-} /* int openvpn_config */
+
+} /* int ted_config */
static int ted_read (void)
{
- double kv;
+ double kw;
double voltage;
if (fd < 0)
return (-1);
- if (ted_read_value (&kv,&voltage) != 0)
+ if (ted_read_value (&kw,&voltage) != 0)
return (-1);
- ted_submit ("kv", kv);
- ted_submit ("voltage", voltage);
+ ted_submit ("ted_kw", kw);
+ ted_submit ("ted_voltage", voltage);
return (0);
} /* int ted_read */
projects / collectd.git / commitdiff