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added sml

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Martin Sebald 5 years ago
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  1. 5
      README.md
  2. 12
      sml/README.md
  3. 2
      sml/sml.items
  4. 14
      sml/sml.rules
  5. 135
      sml/sml_server.c

5
README.md

@ -6,4 +6,7 @@ If you find problems or errors, please [let me know](https://www.sebald.com/kont
The stuff I provide is based on [openHABian](http://docs.openhab.org/installation/openhabian.html) on a Raspberry Pi 3 using openHAB 2.1 and sometimes might reflect on my own (sometimes special) hardware and environment in and around my house.
## presence
Wifi Presence - Detect a person with his/her smartphone entering or leaving the wireless home network (based on a Fritzbox and two DD-WRT based access points).
Wifi Presence - Detect a person with his/her smartphone entering or leaving the wireless home network (based on a Fritzbox and two DD-WRT based access points).
## sml
Read data from a power meter (eHZ) using Smart Message Language (SML).

12
sml/README.md

@ -0,0 +1,12 @@
# Power Meter with SML
Read data from a power meter (eHZ) using Smart Message Language (SML).
First of all you need a IrDA USB dongle like described [here](https://wiki.volkszaehler.org/hardware/controllers/ir-schreib-lesekopf). I got mine from Udo ([Volkszaehler](http://volkszaehler.org)) but it looks like he is not selling these anymore. What I found is [this link](https://shop.weidmann-elektronik.de/index.php?page=product&info=24) to a shop selling these dongles.
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.
* **sml.items**: Put this file into your */etc/openhab2/items*.
* **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*.
* **sml_server.c**: Put this file into the *libsml* subdirectory *src/libsml/examples* directory and compile *libsml*.

2
sml/sml.items

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Number EHZ_consumption_power "power consumption [%.1f kwh]"
Number EHZ_status_power "power status [%.1f kwh]"

14
sml/sml.rules

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rule "EHZ"
when
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
// 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)
val consumptionStr = lines.get(2).split('#').get(1)
// Updating the items
if (EHZ_status_power.state != counterStr) EHZ_status_power.sendCommand(counterStr)
EHZ_consumption_power.postUpdate(consumptionStr)
end

135
sml/sml_server.c

@ -0,0 +1,135 @@
// Copyright 2011 Juri Glass, Mathias Runge, Nadim El Sayed
// DAI-Labor, TU-Berlin
//
// This file is part of libSML.
//
// libSML is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// libSML is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with libSML. If not, see <http://www.gnu.org/licenses/>.
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <termios.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sml/sml_file.h>
#include <sml/sml_transport.h>
int serial_port_open(const char* device) {
int bits;
struct termios config;
memset(&config, 0, sizeof(config));
int fd = open(device, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd < 0) {
printf("error: open(%s): %s\n", device, strerror(errno));
return -1;
}
// set RTS
ioctl(fd, TIOCMGET, &bits);
bits |= TIOCM_RTS;
ioctl(fd, TIOCMSET, &bits);
tcgetattr( fd, &config ) ;
// set 8-N-1
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);
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;
double value;
sml_file *file = sml_file_parse(buffer + 8, buffer_len - 16);
// the sml file is parsed now
for (i = 0; i < file->messages_len; i++) {
sml_message *message = file->messages[i];
if (*message->message_body->tag == SML_MESSAGE_GET_LIST_RESPONSE) {
sml_list *entry;
sml_get_list_response *body;
body = (sml_get_list_response *) message->message_body->data;
for (entry = body->val_list; entry != NULL; entry = entry->next) {
switch (entry->value->type) {
case 0x51: value= *entry->value->data.int8; break;
case 0x52: value= *entry->value->data.int16; break;
case 0x54: value= *entry->value->data.int32; break;
case 0x58: value= *entry->value->data.int64; break;
case 0x61: value= *entry->value->data.uint8; break;
case 0x62: value= *entry->value->data.uint16; break;
case 0x64: value= *entry->value->data.uint32; break;
case 0x68: value= *entry->value->data.uint64; break;
default:
value = 0;
}
int scaler = (entry->scaler) ? *entry->scaler : 1;
if (scaler==-1)
value *= 0.0001;
if (value) {
printf("%d-%d:%d.%d.%d*%d#%.3f#\n",
entry->obj_name->str[0], entry->obj_name->str[1],
entry->obj_name->str[2], entry->obj_name->str[3],
entry->obj_name->str[4], entry->obj_name->str[5], value);
}
}
sml_file_free(file);
exit(0); // processed first message - exit
}
}
}
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);
}
return 0;
}
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