Problem to receive HEX Data

[wendy2702]

• SerialPort Version:6.1.1
• NodeJS Version: v6.13.0
• Operating System and Hardware Platform: RPI3 Linux Jessie

Hi all,

i'm quite new in Javascript and git so apologize for any mistakes i made opening this issue.

I try to read data from a Heating device but i failed to receive the data via script. From Serial port sniffer i can see that the answer is coming but for some reason i did not see them at i.e. my log/console.

This is the script i used:

var buffer = new Buffer(12);
buffer[0] = 0x10;
buffer[1] = 0x02;
buffer[2] = 0x01;
buffer[3] = 0x15;
buffer[4] = 0x00;
buffer[5] = 0x00;
buffer[6] = 0x00;
buffer[7] = 0xf3;
buffer[8] = 0x10;
buffer[9] = 0x03;
buffer[10] = 0x7c;
buffer[11] = 0x32;
var port = new SerialPort("/dev/ttyUSB0", {
baudRate: 9600,
dataBits : 8,
parity : 'none',
stopBits: 1,
flowControl : false
},
function (err) {
if (err) {
return console.log('Error1: ', err.message);

}

port.on('data', function (data) {
console.log('Data: ' + data);
var daten=[];
daten=data.toString('hex');
setState('Waterkotte.Daten.Rohdaten', daten & 0xFF,true);
port.close();
});

// Flush input
port.flush();

// send hello
port.write(buffer, function(err) {
if (err) {
return console.log('Error on write: ', err.message);

}
console.log('Daten gesendet');
// port.close();
});
});

port.on('open', function() {
console.log('Connected');
});

port.on('error', function(err) {
console.log('Error2: ', err.message);
// port.close();
});

// close port if the script stopped (to be able to open it again)
onStop(function (callback) {
if (port && port.isOpen) {
port.close();
console.log('port closed');
}
// callback();

});

If i use the serial port sniffer tool: jpnevulator which was startet with:

jpnevulator --ascii --timing-print --tty /dev/ttyUSB0:SB9600d --read

I can see that the correct answer is coming:

2018-02-28 10:14:54.147334:
FF 10 02 00 17 1F BE 12 0C 06 03 05 29 11 C0 D3 ............)...
47 4E C2 C0 C0 15 DD C0 C8 E6 D8 41 13 53 E1 41 GN.........A.S.A
9D B8 09 42 D3 FF 33 42 69 7D 27 42 52 38 DE C2 ...B..3Bi}'BR8..
00 00 70 41 12 58 86 BE B0 D9 91 C0 E2 39 13 C1 ..pA.X.......9..
2E 59 13 42 66 66 86 C0 00 00 00 00 ED FE 87 3F .Y.Bff.........?
47 F5 04 41 C8 E6 D8 41 13 53 E1 41 00 00 90 41 G..A...A.S.A...A
13 53 E1 41 69 7D 27 42 10 10 0B 0B 1C 02 12 96 .S.Ai}'B........
03 5D 46 DE C9 1B 46 1B FD 82 45 00 00 00 00 01 .]F...F...E.....
01 01 01 01 01 01 01 01 01 01 01 00 00 00 00 00 ................
C7 53 00 00 02 09 25 2A 12 12 01 0D 01 E3 20 00 .S....%*...... .
00 4E 5B 1D C0 82 E9 43 40 92 E6 17 40 E1 51 FE .N[....C@...@.Q.
3E 09 6F 14 42 B5 8B 00 42 CC 77 1B 41 3F 3F 47 >.o.B...B.w.A??G
42 02 00 00 00 A0 41 00 00 00 00 00 00 00 00 2C B.....A........,
ED 02 00 02 A3 20 00 20 00 00 00 02 00 00 00 00 ..... . ........
00 00 00 03 01 08 08 00 00 00 00 00 00 00 01 27 ...............'
00 7D 01 27 00 28 35 12 10 03 19 DF FF          .}.'.(5......

But this Hex string i'm not able to see as "data" at my console/log.

This is an example feedback:

14:00:41.247   [info]   javascript.0 Stop script script.js.Skript1
14:00:41.277   [info]   javascript.0 Start javascript script.js.Skript1
14:00:41.278   [info]   javascript.0 script.js.Skript1: registered 0 subscriptions and 0 schedules
14:00:41.279   [info]   javascript.0 script.js.Skript1: Connected
14:00:41.279   [info]   javascript.0 script.js.Skript1: Daten gesendet
14:00:41.391   [info]   javascript.0 script.js.Skript1: Data: d0
14:00:54.192   [info]   javascript.0 Stop script script.js.Skript1
14:11:15.612   [info]   javascript.0 Stop script script.js.Skript1
14:11:18.807   [info]   javascript.0 Start javascript script.js.Skript1
14:11:18.808   [info]   javascript.0 script.js.Skript1: registered 0 subscriptions and 0 schedules
14:11:18.814   [info]   javascript.0 script.js.Skript1: Connected
14:11:18.818   [info]   javascript.0 script.js.Skript1: Daten gesendet
14:11:18.843   [info]   javascript.0 script.js.Skript1: Data: 
14:11:28.669   [info]   javascript.0 Stop script script.js.Skript1
14:11:29.698   [info]   javascript.0 Start javascript script.js.Skript1
14:11:29.699   [info]   javascript.0 script.js.Skript1: registered 0 subscriptions and 0 schedules
14:11:29.700   [info]   javascript.0 script.js.Skript1: Connected
14:11:29.700   [info]   javascript.0 script.js.Skript1: Daten gesendet
14:11:29.753   [info]   javascript.0 script.js.Skript1: Data: @
14:11:45.748   [info]   javascript.0 Stop script script.js.Skript1
14:11:47.483   [info]   javascript.0 Start javascript script.js.Skript1
14:11:47.485   [info]   javascript.0 script.js.Skript1: registered 0 subscriptions and 0 schedules
14:11:47.485   [info]   javascript.0 script.js.Skript1: Connected
14:11:47.485   [info]   javascript.0 script.js.Skript1: Daten gesendet

As you can see the value for "Data" is different all the time.

What i'm doing wrong?

Thanks for help

[IvanSanchez]

This piece of code here...

port.on('data', function (data) {
  console.log('Data: ' + data);
  var daten=[];
  daten=data.toString('hex');
  setState('Waterkotte.Daten.Rohdaten', daten & 0xFF,true);
  port.close();
});

... tells me that you're closing the serial port as soon as you receive any data packet. You should give a bit of time for all the buffers to be flushed. Keep the port open until you're sure you got enough data.

(BTW, please indent your code, makes it easier to read)

[wendy2702]

Hi Ivan,

thanks for answer.

I changed for testing to that:

port.on('data', function (data) {
    console.log('Data: ' + data);
    var daten=[];
    daten=data.toString('hex');
    setState('Waterkotte.Daten.Rohdaten', daten & 0xFF,true);
    //port.close();

Received this as feedback:

8:00:43.967 | [info] | javascript.0 script.js.Skript1: Connected
-- | -- | --
18:00:43.969 | [info] | javascript.0 script.js.Skript1: Daten gesendet
18:00:43.985 | [info] | javascript.0 script.js.Skript1: Data: �
18:00:44.003 | [info] | javascript.0 script.js.Skript1: Data: �)�)��
18:00:44.016 | [info] | javascript.0 script.js.Skript1: Data: �����R���v�A
18:00:44.032 | [info] | javascript.0 script.js.Skript1: Data: ��A�l�A��3B
18:00:44.049 | [info] | javascript.0 script.js.Skript1: Data: ll8BR8��pA
18:00:44.064 | [info] | javascript.0 script.js.Skript1: Data: '�@���?�5@:
18:00:44.079 | [info] | javascript.0 script.js.Skript1: Data: �A���@
18:00:44.095 | [info] | javascript.0 script.js.Skript1: Data: d@���@�v�A�
18:00:44.111 | [info] | javascript.0 script.js.Skript1: Data: �A�A��All
18:00:44.128 | [info] | javascript.0 script.js.Skript1: Data: 8B9�]F
18:00:44.143 | [info] | javascript.0 script.js.Skript1: Data: ��F
�E
18:00:44.159 | [info] | javascript.0 script.js.Skript1: Data: 












18:00:44.176 | [info] | javascript.0 script.js.Skript1: Data: �S    %*
18:00:44.191 | [info] | javascript.0 script.js.Skript1: Data: 
 
� N[
18:00:44.207 | [info] | javascript.0 script.js.Skript1: Data: ���C@��@�Q�
18:00:44.230 | [info] | javascript.0 script.js.Skript1: Data: > oB��B�wA
18:00:44.243 | [info] | javascript.0 script.js.Skript1: Data: ??GB�A
18:00:44.256 | [info] | javascript.0 script.js.Skript1: Data: +�
18:00:44.273 | [info] | javascript.0 script.js.Skript1: Data: +5
18:00:44.288 | [info] | javascript.0 script.js.Skript1: Data: �@(
18:00:44.304 | [info] | javascript.0 script.js.Skript1: Data: 
'
'(5
18:00:44.321 | [info] | javascript.0 script.js.Skript1: Data: ���

I was expecting the same HEX Code like it is displayed with Sniffer.

What else needs to be changed?

Thanks for support.

[IvanSanchez]

Replace

    console.log('Data: ' + data);

with

    console.log('Data: ', data);

...that will allow you to see things more clearly. if you use the + operator, you'll be casting everything into strings.

[wendy2702]

After changing the above mentioned line it looks like this:

19:01:22.577 | [info] | javascript.0 script.js.Skript1: Daten gesendet
-- | -- | --
19:01:22.602 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.618 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.634 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.650 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.666 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.684 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.699 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.714 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.730 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.746 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.761 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.777 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.793 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.808 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.824 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.841 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.856 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.872 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.889 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.904 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.920 | [info] | javascript.0 script.js.Skript1: Data:
19:01:22.937 | [info] | javascript.0 script.js.Skript1: Data:

[wendy2702]

If i change the logging to:

console.log('Data: ' + data.toString('hex'));

I got this:

19:35:56.809 | [info] | javascript.0 script.js.Skript1: Daten gesendet
-- | -- | --
19:35:56.836 | [info] | javascript.0 script.js.Skript1: Data: ff1002
19:35:56.852 | [info] | javascript.0 script.js.Skript1: Data: 00171fbe120c06030529a00dcc
19:35:56.868 | [info] | javascript.0 script.js.Skript1: Data: c0c36bd0c0fd73c0c0d525d7
19:35:56.883 | [info] | javascript.0 script.js.Skript1: Data: 4118dee341276e0b42d3ff33
19:35:56.899 | [info] | javascript.0 script.js.Skript1: Data: 42882b2e425238dec2000070
19:35:56.916 | [info] | javascript.0 script.js.Skript1: Data: 41007c9c3bfe348fc05ad313c1
19:35:56.931 | [info] | javascript.0 script.js.Skript1: Data: 70761442333373c0000000
19:35:56.947 | [info] | javascript.0 script.js.Skript1: Data: 00949c873f3f190641d525d741
19:35:56.963 | [info] | javascript.0 script.js.Skript1: Data: 18dee3410000904118dee34188
19:35:56.980 | [info] | javascript.0 script.js.Skript1: Data: 2b2e421320141c0212b4185d
19:35:57.008 | [info] | javascript.0 script.js.Skript1: Data: 4698dc1b461c018345000000
19:35:57.013 | [info] | javascript.0 script.js.Skript1: Data: 000101010101010101010101
19:35:57.028 | [info] | javascript.0 script.js.Skript1: Data: 010000000000c7530000020925
19:35:57.043 | [info] | javascript.0 script.js.Skript1: Data: 2a1212010d01e32000004e
19:35:57.061 | [info] | javascript.0 script.js.Skript1: Data: 5b1dc082e9434092e61740e151
19:35:57.076 | [info] | javascript.0 script.js.Skript1: Data: fe3e096f1442b58b0042cc771b
19:35:57.091 | [info] | javascript.0 script.js.Skript1: Data: 413f3f474202000000a041
19:35:57.107 | [info] | javascript.0 script.js.Skript1: Data: 00000000000000002cbe020002
19:35:57.123 | [info] | javascript.0 script.js.Skript1: Data: a32000200000000200000000
19:35:57.139 | [info] | javascript.0 script.js.Skript1: Data: 000000030108080000000000
19:35:57.155 | [info] | javascript.0 script.js.Skript1: Data: 000001270017012700283512
19:35:57.171 | [info] | javascript.0 script.js.Skript1: Data: 1003848aff

Is it somehow possible to get it as one big string or is it already on string and only splitted at log?

[IvanSanchez]

It's up to you to concatenate all the data together. The usual thing to do is create a Buffer or an Uint8Array big enough, and put the incoming data there. When you have enough, do something with the data and empty the buffer.

What is the format of the data you're receiving?

[wendy2702]

Hi,

data are coming as Hex Values. Output should be 243bytes.

Adresse Anzahl  MenueEntry  MenueName_de
0x0000  0x0002  00.00   Versions-Nummer
0x0002  0x0003  00.01   Versions-Datum
0x0005  0x0003  00.02   Betriebs-Mode
0x0008  0x0004  01.00   Temp-Aussen
0x000C  0x0004  01.01   Temp-Aussen-24h
0x0010  0x0004  01.02   Temp-Aussen-1h
0x0014  0x0004  01.03   Temp-Ruecklauf Soll
0x0018  0x0004  01.04   Temp-Ruecklauf
0x001C  0x0004  01.05   Temp-Vorlauf
0x0020  0x0004  01.06   Temp-WW Soll
0x0024  0x0004  01.07   Temp-WW Ist
0x0028  0x0004  01.08   Temp-Raum
0x002C  0x0004  01.09   Temp-Raum-1h
0x0030  0x0004  01.10   Temp-WQuelle-Ein
0x0034  0x0004  01.11   Temp-WQuelle-Aus
0x0038  0x0004  01.12   Temp-Verdampfer
0x003C  0x0004  01.13   Temp-Kondensator
0x0040  0x0004  01.14   Temp-Saugleitung
0x0044  0x0004  01.15   Temp-frei
0x0048  0x0004  01.16   Druck-Verdampfer
0x004C  0x0004  01.17   Druck-Kondensator
0x00F3  0x0001  02.00   Handabschaltung
0x00F4  0x0004  02.01   Hzg Einsatzzeitpunkt Sollwert
0x00F8  0x0004  02.02   Hzg Ruecklauf Sollwert am Einsatzp.
0x00FC  0x0004  02.03   Kennline Steigung Soll
0x0100  0x0004  02.04   Kennline Obere Begrenzung
0x0050  0x0004  02.05   Hzg: Temp Ruecklauf Soll
0x0054  0x0004  02.06   Hzg: Temp Ruecklauf Ist
0x0104  0x0001  02.07   Sollwertanhebung 4k fuer 24 Stunden
0x0105  0x0004  02.08   Pilotraum Sollwert
0x0109  0x0001  02.09   Pilotraum Faktor
0x010A  0x0004  02.10   Externe Anhebung
0x010E  0x0003  02.11   Freigabe Heizung
0x0111  0x0003  02.12   Sperren Heizung
0x0114  0x0003  02.13   Sollwertaenderung Ein
0x0117  0x0003  02.14   Sollwertaenderung Aus
0x011A  0x0004  02.15   St. 2 Kl. Obere Begrenzung
0x011E  0x0004  02.16   Kennlinie Hysterese
0x0122  0x0001  02.17   Pumpen Nachlaufzeit
0x0123  0x0001  03.00   Abschaltung
0x0124  0x0004  03.01   Klg Einsatzzeitpunkt
0x0128  0x0004  03.02   Ruecklauftemp. Sollwert am Einsatzzeitp.
0x012C  0x0004  03.03   Klg Kennlinie Steigung Soll
0x0130  0x0004  03.04   Kennlinie untere Begrenzung
0x0058  0x0004  03.05   Klg: Temp Ruecklauf Soll
0x005C  0x0004  03.06   Klg: Temp Ruecklauf Ist
0x0134  0x0001  04.00   Abschaltung
0x0135  0x0003  04.01   Zeit ein
0x0138  0x0003  04.02   Zeit aus
0x0060  0x0004  04.03   WW: Temp Ist
0x013b  0x0004  04.04   Warmwasser Soll
0x013F  0x0004  04.05   Beckenwasser Temperatur Soll
0x0143  0x0004  04.06   Warmwasser Hysterese
0x0147  0x0004  04.07   Beckenwasser Hysterese
0x0064  0x0003  05.00   Uhrzeit
0x0067  0x0003  05.01   Datum
0x006A  0x0004  05.02   Betriebsstunden Kompressor
0x006E  0x0004  05.03   Betriebsstunden Heizbetrieb
0x0072  0x0004  05.04   Betriebsstunden Warmwasserbetrieb
0x0076  0x0004  05.05   Betriebsstunden Stufe 2
0x007A  0x0003  05.06   Messbeginn Zeit Kompressor
0x007D  0x0003  05.07   Messbeginn Datum Kompressor
0x0080  0x0003  05.08   Messbeginn Zeit Pumpen
0x0083  0x0003  05.09   Messbeginn Datum Pumpen
0x0086  0x0001  05.10   Betriebsstunden Reset Kompressor
0x0087  0x0001  05.11   Betriebsstunden Reset Pumpen
0x0088  0x0001  06.00   Kennwort
0x0089  0x0001  06.01   Werkseinstellung
0x014B  0x0001  06.02   Modem Klingelzeichen
0x014C  0x0001  06.03   Fremdzugriff
0x014D  0x0001  06.04   Schluesselnummer
0x014E  0x0003  06.05   SetBetriebsMode
0x008A  0x0001  06.06   Reset Waermepumpe
0x0151  0x0001  06.07   Hzg: Externe Freigabe
0x0152  0x0004  06.08   Hzg: Externe Ruecklaufsteuerung
0x0156  0x0004  06.09   St2: TempQAus < Min
0x015A  0x0004  06.10   St2: TempVerd < Min
0x015E  0x0001  06.11   Estrich Aufheizen
0x015F  0x0001  06.12   Hzg: Externe Steuerung
0x0160  0x0001  06.13   St2 bei EVU Absch.
0x0161  0x0001  06.14   Frg. Beckenwasser
0x0162  0x0004  06.15   Scale Faktor
0x0166  0x0004  06.16   Offset Niederdr.
0x016A  0x0004  06.17   Offset Hochdr.
0x016E  0x0001  06.18   DO-Handkanal
0x016F  0x0001  06.19   DO-Handkanal Ein
0x008B  0x0002  06.20   CRC-Summe
0x0174  0x0001  06.21   Neu-Start
0x0175  0x0001  06.22   Run-Flag
0x008E  0x0002  06.23   Display Zeile 1
0x0090  0x0001  06.24   Display Zeile 2
0x0091  0x0003  07.00   Ausfall Zeit
0x0094  0x0003  07.01   Ausfall Datum
0x0097  0x0001  07.02   Ausfall Betriebszustaende
0x0098  0x0001  07.03   Ausfall DO Buffer
0x0099  0x0001  07.04   Ausfall DI Buffer
0x009A  0x0001  07.05   Ausfall AI Error
0x009B  0x0001  07.06   Ausfall AI DI
0x009C  0x0004  07.07   Ausfall AI Temp Aussen
0x00A0  0x0004  07.08   Ausfall AI Temp WQ Ein
0x00A4  0x0004  07.09   Ausfall AI Temp WQ Aus
0x00A8  0x0004  07.10   Ausfall AI Temp Verdampfer
0x00AC  0x0004  07.11   Ausfall AI Temp Heizung Ein
0x00B0  0x0004  07.12   Ausfall AI Temp Heizung Aus
0x00B4  0x0004  07.13   Ausfall AI Temp Kondensation
0x00B8  0x0004  07.14   Ausfall AI Temp Warmwasser
0x00BC  0x0001  07.15   Ausfall Term AI Error
0x00BD  0x0001  07.16   Ausfall Term AI Di
0x00BE  0x0004  07.17   Ausfall AI Temp Raum
0x00C2  0x0001  07.18   Clear Ausfälle
0x00C3  0x0001  08.00   Unterbrechungen
0x00C4  0x0001  08.01   Warnung Eingangsseite
0x00C5  0x0001  08.02   Warnung Ausgangsseite
0x00C6  0x0001  08.03   Warnung Sonstige
0x00C7  0x0001  08.04   Ausfall
0x00C8  0x0001  08.05   AI Error Fuehler Ausfall
0x00C9  0x0001  08.06   AI Di Fuehler defekt
0x00C9  0x0003  08.07   Kontrollwert fuer Fuehlerkalibrierung
0x00CC  0x0001  08.08   Unterbrechung Raumfuehler
0x00CD  0x0001  08.09   Kurzschluss Raumfuehler
0x0171  0x0001  08.10   Unterbrechung Warung Eingangsseite
0x0172  0x0001  08.11   Unterbrechung Warung Ausgangsseite
0x0173  0x0001  08.12   Unterbrechung Warung Ausgangsseite
0x00CE  0x0001  09.00   Betriebszustaende
0x00CF  0x0001  09.01   DO-Buffer
0x00D0  0x0001  09.02   DI-Buffer
0x00D1  0x0003  09.03   Gesamtstatus
0x00D4  0x0003  09.04   Status Verriegelung
0x00D7  0x0003  09.05   Status Heizung
0x00DF  0x0001  09.10   Mode Heizung
0x00E0  0x0001  09.11   Mode Kuehlung
0x00E1  0x0001  09.12   Mode Warmwasser
0x0000  0x0001  10.00   Logger Zyklus
0x0000  0x0001  10.01   Initialisierung des Loggers
0x0000  0x0004  10.02   Speicherfehler des Loggers
0x00E3  0x0003  10.03   Uhrzeit der Initialisierung
0x00E6  0x0003  10.04   Datum der Initialisierung
0x00E9  0x0002  10.05   Maximale Anzahl der Datensaetze
0x00EB  0x0003  10.06   Laufende Nr. aktueller Datensatz
0x00ED  0x0002  10.07   Anzahl gespeicherter Datensaetze
0x00EF  0x0002  10.08   Groesse eines Datensatzes
0x00F1  0x0002  10.09   Max Groesse das Datenspeicher

As example the 1fbe from this row:

19:35:56.852 | [info] | javascript.0 script.js.Skript1: Data: 00171fbe120c06030529a00dcc

is the Version Number which i can check from Display an is 8126.

Do you need to know anything else?

[wendy2702]

In the meantime i managed to put all data in one row using the Bytelength parser function but i noticed the the answer from Heating device varies from 252 to 256.

Is it somehow possible to make bytelength flexible?

And how can i resend my buffer to heating device each 60second without restarting complete script?

createState('Waterkotte.Daten.Rohdaten');

// To use the `ByteLength` parser:
const SerialPort = require('serialport');
const ByteLength = SerialPort.parsers.ByteLength;

var buffer = new Buffer(12);
buffer[0] = 0x10;
buffer[1] = 0x02;
buffer[2] = 0x01;
buffer[3] = 0x15;
buffer[4] = 0x00;
buffer[5] = 0x00;
buffer[6] = 0x00;
buffer[7] = 0xf3;
buffer[8] = 0x10;
buffer[9] = 0x03;
buffer[10] = 0x7c;
buffer[11] = 0x32;
const port = new SerialPort("/dev/ttyUSB0", {
    baudRate: 9600,
    dataBits : 8,
    parity : 'none',
    stopBits: 1
//  flowControl : false
}, function (err) {
    if (err) {
        return console.log('Error1: ', err.message);
    }

    const parser = port.pipe(new ByteLength({ length: 253 }));
    parser.on('data', function (data) {
        console.log('Data received: ' + data.toString('hex'));
        var daten = data.toString('hex');
        setState('Waterkotte.Daten.Rohdaten', daten, true);
        //port.close();
    });

    // Flush input
    port.flush();

    // send Data
    port.write(buffer, function(err) {
        if (err) {
            return console.log('Error on write: ', err.message);
        }

        console.log('Daten send');
//      port.close();
    });
});

port.on('open', function() {
    console.log('Connected');
});

port.on('error', function(err) {
    console.log('Error2: ', err.message);
//  port.close();
});

// close port if the script stopped (to be able to open it again)
onStop(function (callback) {
    if (port && port.isOpen) {
        port.close();
        console.log('port closed');
    }
});

[IvanSanchez]

In the meantime i managed to put all data in one row using the Bytelength parser function but i noticed the the answer from Heating device varies from 252 to 256.

Is it somehow possible to make bytelength flexible?

Parsing the data is up to you, unfortunately. You'll have to handle the buffers for incoming data manually.

If the protocol is based on request-response logic (i.e. the heater replies after you send it some commands), then you could for example implement some timers - output the entire response after X milliseconds without receiving any data.

And how can i resend my buffer to heating device each 60second without restarting complete script?

See https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setInterval , and then

setInterval(function(){
    port.write(new Buffer([0x01, 0x02, 0x03]), function(err){
        // handle transmission errors
    });
}, 60000);

Please note that this sends data every 60 seconds. This is different than waiting 60 seconds after sending the previous piece of data, and is different than waiting 60 seconds after receiving data.

I recommend you do some research on how setInterval() and setTimeout() (along with clearInterval() and clearTimeout()) work.

[wendy2702]

Hi Ivan,

thanks for answer. I'll try to find a solution for this:

If the protocol is based on request-response logic (i.e. the heater replies after you send it some commands), then you could for example implement some timers - output the entire response after X milliseconds without receiving any data.

Guess it will take some time till i understand how to do this.

[wendy2702]

I was able to get the script working that it fits my needs.

Thanks for support.

[reconbot]

Great! Want to share it?

On Wed, Mar 7, 2018, 6:26 AM wendy2702 notifications@github.com wrote:

I was able to get the script working that it fits my needs.

Thanks for support.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/node-serialport/node-serialport/issues/1506#issuecomment-371109040, or mute the thread https://github.com/notifications/unsubscribe-auth/AABlbsQL8YIqsWRbt6L7azOtzIul_OZzks5tb8PcgaJpZM4SWeiZ .

[wendy2702]

Please find below. Guess this can be coded in a better way but as I'm a beginner it's OK for me.

if you have any idea how to optimize the code please let me know.

createState('Waterkotte.Daten.Abfrage_Rohdaten');

// To use the `ByteLength` parser:
const SerialPort = require('serialport');
const ByteLength = SerialPort.parsers.ByteLength;

var buffer = new Buffer(12);
buffer[0] = 0x10;
buffer[1] = 0x02;
buffer[2] = 0x01;
buffer[3] = 0x15;
buffer[4] = 0x00;
buffer[5] = 0x00;
buffer[6] = 0x00;
buffer[7] = 0xf3;
buffer[8] = 0x10;
buffer[9] = 0x03;
buffer[10] = 0x7c;
buffer[11] = 0x32;
const port = new SerialPort("/dev/ttyUSB0", {
    baudRate: 9600,
    dataBits : 8,
    parity : 'none',
    stopBits: 1
//  flowControl : false
}, function (err) {
    if (err) {
//        port.close();
        return console.log('Error1: ', err.message);
    }

    const parser = port.pipe(new ByteLength({ length: 253 }));
    parser.on('data', function (data) {
        console.log('Data received: ' + data.toString('hex'));
        var daten = data.toString('hex');
        setState('Waterkotte.Daten.Abfrage_Rohdaten', daten, true);
        //port.close();
    });

    // Flush input
    port.flush();

    // send Data
        port.write(buffer, function(err) {
            if (err) {
                return console.log('Error on write: ', err.message);
            }

            console.log('Daten send');
//          port.close();
        });
    });

port.on('open', function() {
    console.log('Connected');
});

port.on('error', function(err) {
    console.log('Error2: ', err.message);
//  port.close();
});

// close port if the script stopped (to be able to open it again)
onStop(function (callback) {
    if (port && port.isOpen) {
        port.close();
        console.log('port closed');
    }
});

[reconbot]

I don't recommend flushing but the rest is pretty ok!

---

Francis Gulotta wizard@roborooter.com

On Wed, Mar 7, 2018 at 8:09 AM, wendy2702 notifications@github.com wrote:

Please find below. Guess this can be coded in a better way but as I'm a beginner it's OK for me.

if you have any idea how to optimize the code please let me know.

createState('Waterkotte.Daten.Abfrage_Rohdaten');

// To use the ByteLength parser: const SerialPort = require('serialport'); const ByteLength = SerialPort.parsers.ByteLength;

var buffer = new Buffer(12); buffer[0] = 0x10; buffer[1] = 0x02; buffer[2] = 0x01; buffer[3] = 0x15; buffer[4] = 0x00; buffer[5] = 0x00; buffer[6] = 0x00; buffer[7] = 0xf3; buffer[8] = 0x10; buffer[9] = 0x03; buffer[10] = 0x7c; buffer[11] = 0x32; const port = new SerialPort("/dev/ttyUSB0", { baudRate: 9600, dataBits : 8, parity : 'none', stopBits: 1 // flowControl : false }, function (err) { if (err) { // port.close(); return console.log('Error1: ', err.message); }

const parser = port.pipe(new ByteLength({ length: 253 }));
parser.on('data', function (data) {
  console.log('Data received: ' + data.toString('hex'));
  var daten = data.toString('hex');
  setState('Waterkotte.Daten.Abfrage_Rohdaten', daten, true);
  //port.close();

});

// Flush input port.flush();

// send Data port.write(buffer, function(err) { if (err) { return console.log('Error on write: ', err.message); }

      console.log('Daten send');

// port.close(); }); });

port.on('open', function() { console.log('Connected'); });

port.on('error', function(err) { console.log('Error2: ', err.message); // port.close(); });

// close port if the script stopped (to be able to open it again) onStop(function (callback) { if (port && port.isOpen) { port.close(); console.log('port closed'); } });

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/node-serialport/node-serialport/issues/1506#issuecomment-371132919, or mute the thread https://github.com/notifications/unsubscribe-auth/AABlblFaAiCojt0qB8ssS5Xf3z3fg4WFks5tb9vxgaJpZM4SWeiZ .

[wendy2702]

Hi,

why not flushing the port?

Sometime the heating device response is longer then 253. Do you have any idea how to modify script to get complete message even it is longer?

Thanks

[reconbot]

Flushing the port throws away data. Why flush the port? https://node-serialport.github.io/node-serialport/BaseBinding.html#flush

Data is received by the OS and given right away you can use parsers to emit it in chunks, or by patterns, etc. https://node-serialport.github.io/node-serialport/global.html#Parsers

[wendy2702]

I tried with Regex and Delimiter Parser but didn't manage to get it working. My Problem is that the end of the received HEX Value allways looks like this:

10 03 xx xx ff

values for "xx xx" changes all the time.

I appreciate any kind of help.

[reconbot]

This problem is harder than it looks.

Do you know the other kind of data it might send?

[wendy2702]

Hi,

the data string allways starts with:

ff100200171fbe120c0

But the length and the content between start and end changes all the time. Im most cases the length is 253 but sometimes longer which depends on what the heating device currently is doing.

These are three examples with same length of 253:

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