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udev and new libsml repo

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This commit is contained in:
Martin Sebald
2018-01-19 13:33:41 +01:00
parent a644c3508d
commit 3104bbec3f
4 changed files with 44 additions and 33 deletions
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1
sml/50-sml.rules Normal file
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@@ -0,0 +1 @@
SUBSYSTEMS=="usb", KERNEL=="ttyUSB*", ATTRS{manufacturer}=="Silicon Labs", ATTRS{serial}=="00xxxxxx", SYMLINK="sml0"

9
sml/README.md
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@@ -5,8 +5,13 @@ First of all you need is a eHZ (Elektronischer Haushaltszähler) and an IrDA USB
I used several information from the openHAB community, mainly from [this topic](https://community.openhab.org/t/using-a-power-meter-sml-with-openhab/21923/1).
You need to get, modify and compile [libsml](https://github.com/dailab/libsml) from Github liked described [here](https://community.openhab.org/t/using-a-power-meter-sml-with-openhab/21923/1). I included my version of sml_server.c here as it differs a bit.
You need to get, modify and compile [libsml](https://github.com/volkszaehler/libsml) (the [old libsml](https://github.com/dailab/libsml) is dead!) from Github liked described [here](https://community.openhab.org/t/using-a-power-meter-sml-with-openhab/21923/1) and in my comment about the new repository [further down in the thread](https://community.openhab.org/t/using-a-power-meter-sml-with-openhab/21923/12). But I included my version of sml_server.c (pulled and edited 2018/01/19) here as it differs a bit.
* **sml.items**: Put this file into your */etc/openhab2/items*.
If you like to have a fixed device name (e.g. */dev/sml0* instead of */dev/ttyUSB0*) which cannot change (it may if you plug in another USB device), please use the *50-sml.rules* file and modify it. To find our the serial and maybe also different manufacturer of our device use the following command to display USB device properties:
```
lsusb -v
```
* **50-sml.rules**: Put this file into your */etc/udev/rules.d* directory and modify it for your specific setup.
* **sml.items**: Put this file into your */etc/openhab2/items* directory.
* **sml.rules**: Put this file into your */etc/openhab2/rules* directory and modify it for your specific setup. In my case the compiled sml_server is in */home/openhabian/src/libsml/examples*. You also might need to adjust the device name, in my case it is: */dev/ttyUSB0*
* **sml_server.c**: Put this file into the *libsml* subdirectory *src/libsml/examples* and compile *libsml* with this file, not the original one.

2
sml/sml.rules
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@@ -3,7 +3,7 @@ rule "EHZ"
Time cron "0,30 */1 * * * ?" // this one cycles every 30 seconds. depends on your needs
then
// getting the payload of the meter
var String meter_payload = executeCommandLine("/home/openhabian/src/libsml/examples/sml_server /dev/ttyUSB0", 5000) // note the argument /dev/ttyUSB0 - your meter-device-id goes here
var String meter_payload = executeCommandLine("/home/openhabian/volkszaehler/libsml/examples/sml_server /dev/ttyUSB0", 5000) // note the argument /dev/ttyUSB0 or /dev/sml0 - your meter-device-id goes here
// splitting the payload - first in lines, then getting counterStr and consumptionStr with delimiter "#"
val lines = meter_payload.split('\n')
val counterStr = lines.get(0).split('#').get(1)

65
sml/sml_server.c
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@@ -2,6 +2,9 @@
// DAI-Labor, TU-Berlin
//
// This file is part of libSML.
// Thanks to Thomas Binder and Axel (tuxedo) for providing code how to
// print OBIS data (see transport_receiver()).
// https://community.openhab.org/t/using-a-power-meter-sml-with-openhab/21923
//
// libSML is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
@@ -22,20 +25,30 @@
#include <errno.h>
#include <termios.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#include <sys/ioctl.h>
#include <sml/sml_file.h>
#include <sml/sml_transport.h>
#include <sml/sml_value.h>
int serial_port_open(const char* device) {
int bits;
struct termios config;
memset(&config, 0, sizeof(config));
if (!strcmp(device, "-"))
return 0; // read stdin when "-" is given for the device
#ifdef O_NONBLOCK
int fd = open(device, O_RDWR | O_NOCTTY | O_NONBLOCK);
#else
int fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY);
#endif
if (fd < 0) {
printf("error: open(%s): %s\n", device, strerror(errno));
fprintf(stderr, "error: open(%s): %s\n", device, strerror(errno));
return -1;
}
@@ -44,38 +57,24 @@ int serial_port_open(const char* device) {
bits |= TIOCM_RTS;
ioctl(fd, TIOCMSET, &bits);
tcgetattr( fd, &config ) ;
tcgetattr(fd, &config);
// set 8-N-1
config.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
config.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR
| ICRNL | IXON);
config.c_oflag &= ~OPOST;
config.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
config.c_cflag &= ~(CSIZE | PARENB | PARODD | CSTOPB);
config.c_cflag |= CS8;
// set speed to 9600 baud
cfsetispeed( &config, B9600);
cfsetospeed( &config, B9600);
cfsetispeed(&config, B9600);
cfsetospeed(&config, B9600);
tcsetattr(fd, TCSANOW, &config);
return fd;
}
//void transport_receiver(unsigned char *buffer, size_t buffer_len) {
// // the buffer contains the whole message, with transport escape sequences.
// // these escape sequences are stripped here.
// sml_file *file = sml_file_parse(buffer + 8, buffer_len - 16);
// // the sml file is parsed now
// // read here some values ..
// // this prints some information about the file
// sml_file_print(file);
// // free the malloc'd memory
// sml_file_free(file);
//}
void transport_receiver(unsigned char *buffer, size_t buffer_len) {
// Danke an Axel (tuxedo) für seinen Beispielcode
int i;
@@ -117,19 +116,25 @@ void transport_receiver(unsigned char *buffer, size_t buffer_len) {
}
}
int main(int argc, char **argv) {
int main(int argc, char *argv[]) {
// this example assumes that a EDL21 meter sending SML messages via a
// serial device. Adjust as needed.
// char *device = "/dev/cu.usbserial";
char *device=argv[1];
int fd = serial_port_open(device);
if (fd > 0) {
// listen on the serial device, this call is blocking.
sml_transport_listen(fd, &transport_receiver);
close(fd);
if (argc != 2) {
printf("Usage: %s <device>\n", argv[0]);
printf("device - serial device of connected power meter e.g. /dev/cu.usbserial, or - for stdin\n");
exit(1); // exit here
}
// open serial port
int fd = serial_port_open(argv[1]);
if (fd < 0) {
printf("Error: failed to open device (%s)\n", argv[1]);
exit(3);
}
// listen on the serial device, this call is blocking.
sml_transport_listen(fd, &transport_receiver);
close(fd);
return 0;
}