NetModule Router Wiki

User Tools

Site Tools

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
sdk:gps2serial [2015/05/15 13:30] – jurascheksdk:gps2serial [2020/03/25 12:21] (current) – fachet
Line 5: Line 5:
 ===== Script Summary  ===== ===== Script Summary  =====
  
-This Script connects to the GPS server via tcp. The NMEA Frames will be startet by the request "R" and will be then written to the serial interface.  +This Script connects to the GPS server and forwards the data to the first serial interface. 
- +GPS must be enabled and in RAW mode. 
-The default serial parameter are 115200 8N1 (8 databit, no parity, 1 stop bit, no flow controll). This parameter can be configured at the begining of the script. +The default serial parameters for GPS are 4800 8N1 (8 databit, no parity, 1 stop bit, no flow controll). This parameter can be configured at the begining of the script.  
 +Please use if possible a higher data rate e.g. 115200.
  
 ===== Pre Requierments ===== ===== Pre Requierments =====
Line 24: Line 25:
 Detailed step by step instructions how to install a sdk script can be found [[sdk:testing-the-sms-send-script|on this wiki page]] Detailed step by step instructions how to install a sdk script can be found [[sdk:testing-the-sms-send-script|on this wiki page]]
  
-Please combine this script with the **"system-startup" trigger** to a job +Please combine this script with the **"system-startup" trigger** to get a job.
- +
-This script does not need any configuration, but you can define the serial parameter to your needs: +
- +
-<code c> +
- +
-/* Serial Baud Rate 9600, 19200, 38400, 57600, 115200 */ +
-SER_SPEED=115200; +
-/*  number of data bits (5, 6, 7, 8) */ +
-SER_DATABIT=8; +
-/*  number of stop bits (1, 2) */ +
-SER_STOPBIT=1; +
-/* parity (0=no parity, 1=odd parity, 2=even parity) */ +
-SER_PARITY=0; +
-/*  flow control (0=none, 1=xon/xoff, 2=hardware) */ +
-SER_FLOW=0; +
-/*  name of the Serial Interface (Only changed if your device has more then one serial Interface (NB3710) */ +
-DEV = "SERIAL1"; +
- +
- +
-</code> +
- +
-===== Testing ====== +
- +
-To be sure the script is running you can take a look on the [[http://simulator.netmodule.com/logs.php.html|System Log]] and watch for outputs like:  +
-<code bash> +
-Apr 23 00:53:41 NB2700 user.info sdkhost[2283]: testrun: starting serial +
-Apr 23 00:53:42 NB2700 user.info sdkhost[2283]: testrun: Connecting to GPS daemon +
-Apr 23 00:53:42 NB2700 user.info sdkhost[2283]: testrun: Requesting raw NMEA stream +
-Apr 23 00:53:42 NB2700 user.info sdkhost[2283]: testrun: Successfully connected to GPS daemon +
-Apr 23 00:53:42 NB2700 user.info sdkhost[2283]: testrun: Processing NMEA data +
-Apr 23 00:53:42 NB2700 user.info sdkhost[2283]: testrun: Unable to send message to via Serial +
-Apr 23 00:54:08 NB2700 user.info sdkhost[2283]: testrun: starting serial +
-Apr 23 00:54:09 NB2700 user.info sdkhost[2283]: testrun: Connecting to GPS daemon +
-Apr 23 00:54:09 NB2700 user.info sdkhost[2283]: testrun: Requesting raw NMEA stream +
-Apr 23 00:54:09 NB2700 user.info sdkhost[2283]: testrun: Successfully connected to GPS daemon +
-Apr 23 00:54:09 NB2700 user.info sdkhost[2283]: testrun: Processing NMEA data +
- +
-</code>+
  
 ===== The Script ===== ===== The Script =====
Line 68: Line 31:
  
 <code c gps-to-serial.are> <code c gps-to-serial.are>
- 
- 
-/* DESC: This script sends the local GPS NMEA stream (incl. serial/checksum) to a remote UDP server. 
- * Copyright (C) 2013-2015 NetModule AG, Switzerland 
- */ 
- 
 /* Options to configure by user*/ /* Options to configure by user*/
-/* Serial Baud Rate 9600, 19200, 38400, 57600, 115200 */ +SER_SPEED = 4800; /* Serial Baud Rate 4800, 9600, 19200, 38400, 57600, 115200 */ 
-SER_SPEED=115200; +SER_DATABIT = 8; /*  number of data bits (5, 6, 7, 8) */ 
-/*  number of data bits (5, 6, 7, 8) */ +SER_STOPBIT = 1; /*  number of stop bits (1, 2) */  
-SER_DATABIT=8; +SER_PARITY = 0; /* parity (0=no parity, 1=odd parity, 2=even parity) */ 
-/*  number of stop bits (1, 2) */ +SER_FLOW = 0; /*  flow control (0=none, 1=xon/xoff, 2=hardware) */ 
-SER_STOPBIT=1; +DEV = "SERIAL1"; /*  name of the Serial Interface */ 
-/* parity (0=no parity, 1=odd parity, 2=even parity) */ +  
-SER_PARITY=0; +/* GPS Deamon Parameters */ 
-/*  flow control (0=none, 1=xon/xoff, 2=hardware) */ +HOST = "127.0.0.1"; /* local host */ 
-SER_FLOW=0; +PORT = (int) nb_config_get("gpsd.0.port"); 
-/*  name of the Serial Interface (Only changed if your device has more then one serial Interface (NB3710) */ +  
-DEV = "SERIAL1"; +void usage() { 
- +    nb_syslog("Usage: gps2serial.are\n");
- +
- +
-void usage()  +
-{ +
-    nb_syslog("Usage: gps-udp-client.are <server> <port>");+
     exit(1);     exit(1);
 } }
- + 
 int start_serial() { int start_serial() {
- + if (nb_config_get("serial.0.status") != "2") { 
-    /* check serial port config */ +     nb_syslog("serial not assinged to SDK\n"); 
-    status = nb_config_get("serial.0.status"); +        exit(2);
-    if (status != "2") { +
-        nb_syslog("Serial port is not enabled for us"); +
-        return -1;+
     }     }
- +    // printf("set serial attributes\n"); 
-    /* set attributes */ +    if ((rc = nb_serial_setattr(DEV, SER_SPEED, SER_DATABIT, SER_STOPBIT, SER_PARITY, SER_FLOW)) != 0) { 
-    rc = nb_serial_setattr(DEV, SER_SPEED, SER_DATABIT, SER_STOPBIT, SER_PARITY, SER_FLOW); +        nb_syslog("ERROR: unable to set serial attributes (rc %d) to %s\n", rc, DEV);
-    if (rc != 0) { +
-        nb_syslog("ERROR: unable to set serial attributes (rc %d)", rc);+
         return -1;         return -1;
     }     }
- +    // nb_syslog("Open serial device %s\n", DEV); 
-    /* open serial port */ +    if ((fd = nb_serial_open(DEV)) < 0) { 
-    fd = nb_serial_open(DEV); +        nb_syslog("ERROR: can't open serial port %s\n", DEV);
-    if (fd < 0) {+
         return -1;         return -1;
     }     }
- 
     return fd;     return fd;
 } }
- +  
-int connect_gpsd ()+int connect_gpsd()
 { {
-    for (attempt = 0; attempt < 60; attempt++) { +    if (nb_config_get("gpsd.0.status") != "1" || nb_config_get("gpsd.0.cmode") != "1") { 
-        sleep(1); +    nb_syslog("gpsd not enabled or not in RAW mode\n"); 
 +        exit(3); 
 +    } 
 +    while (1) {
         sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);         sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
-        if (sock < 0) { +        if (sock < 0) 
-            nb_syslog("Unable to create socket"); +            nb_syslog("Unable to create socket\n"); 
-            continue; +        else if (connect(sock, HOST, PORT) < 0){ 
-        } +            nb_syslog("Could not connect to GPS daemon\n");
-        nb_syslog("Connecting to GPS daemon"); +
-        if (connect(sock, "127.0.0.1", 2947) < 0){ +
-            nb_syslog("Could not connect to GPS daemon");+
             close(sock);             close(sock);
-            continue;+        } else { 
 +            nb_syslog("Successfully connected to GPS daemon\n"); 
 +            return sock;
         }         }
-        nb_syslog("Requesting raw NMEA stream"); +      sleep(10);
-        if (send(sock, "R\n") < 0) { +
-            nb_syslog("Unable to request raw NMEA stream"); +
-            close(sock); +
-            continue; +
-        } +
- +
-        nb_syslog("Successfully connected to GPS daemon"); +
-        return sock;+
     }     }
- +    /* no return */
-    return -1;+
 } }
- +  
- + 
-SERVER = trim((string) argv[1]); +
-PORT = (int) argv[2]; +
- +
-SERIAL = struct_get(nb_status("system"), "SERIAL_NUMBER"); +
-if (SERIAL == "") { +
-    nb_syslog("Unable to obtain serial number"); +
-    exit(1); +
-} +
 nb_syslog("starting serial"); nb_syslog("starting serial");
-serial_fd = start_serial(); +if ((serial_fd = start_serial()) < 0 ) { 
-if (serial_fd < 0 ) { +    nb_syslog("Could not start serial, exiting\n"); 
-    nb_syslog("Could not start serial, exiting"); +    exit(4);
-    exit(1);+
 } }
 +// printf("connect to gpsd\n");
 gpsd = connect_gpsd(); gpsd = connect_gpsd();
-if (gpsd < 0) { 
-    nb_syslog("Could not start gpsd socket, exiting"); 
-    exit(1); 
-} 
- 
-/* process NMEA stream */ 
-nb_syslog("Processing NMEA data"); 
  
 +// printf("Processing NMEA data\n"); 
 while (1) { while (1) {
-    /* wait for socket data  */ +    // printf("wait for data\n"); 
-    rv = select(gpsd, 3); +    if ((rv = select(gpsd, 10)) == 0) { 
-    if (rv > 0) { + // printf("Select timed out\n");  
-        data = recv(gpsd); +       continue; 
-        len = strlen(data); + } 
-    } else if (rv < 0) { +    if (rv < 0 || ( data = recv(gpsd)) == "") { 
-        nb_syslog("select failed"); +        nb_syslog("Select or recv failed, re-connecting to GPS daemon\n"); 
-        len = -1; + close(gpsd); 
-    } else { +        if ((gpsd = connect_gpsd()) < 0) 
-        /* nothing received */+            exit(5); /* can't connect */
         continue;         continue;
-    }  
-    if (len <= 0) { 
-        nb_syslog("Receive failed, re-connecting to GPS daemon"); 
-        close(gpsd); 
-        gpsd = connect_gpsd(); 
-        if (gpsd < 0) { 
-            exit(1); 
-        } 
-    } else { 
-        str = strcat("PNMID,", SERIAL); 
-        chars = explode(str); 
- 
-        checksum = 0; 
-        for (i = 0; i < length(chars); i++) { 
-            c = ord(chars[i]); 
-            checksum ^= c; 
-        } 
-        sentence = sprintf("$%s*%02X\r\n", str, checksum); 
-        data = strcat(data, sentence); 
-        len = strlen(data); 
-        nb_syslog("len: %i", len); 
-        if (len > 0) { 
-            sent = write(serial_fd, data, len); 
-            if (sent != len) { 
-                nb_syslog("Unable to send message via Serial, sent: %i, len: %i",sent, len); 
-            } 
-        } 
     }     }
- +    len = strlen(data); 
-    + // printf("write data to serial <%s> [%i]\n", data, len); 
 +    if (write(serial_fd, data, len) != len) 
 +       nb_syslog("Unable to send message via Serial, data %s, len: %i\n", data, len);
 } }
 + 
 close(gpsd); close(gpsd);
 close(serial_fd); close(serial_fd);
- +exit(6);
-exit(0); +
- +
 </code> </code>
  
  
  

Page Tools

sdk/gps2serial.1431696645.txt.gz · Last modified: 2015/05/15 13:30 by juraschek