Problem to convert a data Hex-string in Zabbix Item Value

[Naillik]

Hello, here is my problem "Item preprocessing step #1 failed: cannot convert value "" of type "string" from hexadecimal format: invalid value format"

In fact, I use SNMP to get information on a printer : OID .1.3.6.1.2.1.25.3.5.1.2.1 and i get this normaly :

1000 0000 0000 0000 : Low Paper
0100 0000 0000 0000 : No Paper
0010 0000 0000 0000 : Low Toner = 0020 Hex
0001 0000 0000 0000 : No Toner
0000 1000 0000 0000 : Door Open
0000 0100 0000 0000 : Jammed
0000 0010 0000 0000 : Offline
0000 0001 0000 0000 : Service Requested
0000 0000 1000 0000 : Input Tray Missing
0000 0000 0100 0000 : Output Tray Missing
0000 0000 0010 0000 : Marker Supply Missing
0000 0000 0001 0000 : Output Near Full
0000 0000 0000 1000 : Output Full
0000 0000 0000 0100 : Input Tray Empty
0000 0000 0000 0010 : Overdue Preventive Maintainance
0000 0000 0000 0001 : Not assigned

But when i catch the data it appears like that " " = 20 (ascii = Hex)

----------------------- New Test -----------------------
Paessler SNMP Tester 5.2.3 Computername: INFO-0062 Interface: ZZZ.YY.Z.YY
11/06/2018 15:27:49 (10 ms) : Device: ZZZ.YY.Z.YY
11/06/2018 15:27:49 (14 ms) : SNMP V1
11/06/2018 15:27:49 (18 ms) : Custom OID .1.3.6.1.2.1.25.3.5.1.2.1
11/06/2018 15:27:49 (26 ms) : SNMP Datatype: ASN_OCTET_STR
11/06/2018 15:27:49 (48 ms) : -------
11/06/2018 15:27:49 (52 ms) : Value:
11/06/2018 15:27:49 (57 ms) : Done


----------------------- New Test -----------------------
Paessler SNMP Tester 5.2.3 Computername: INFO-0062 Interface: ZZZ.YY.Z.YY
11/06/2018 15:27:53 (9 ms) : Device: ZZZ.YY.Z.YY
11/06/2018 15:27:53 (13 ms) : SNMP V1
11/06/2018 15:27:53 (17 ms) : Custom OID .1.3.6.1.2.1.25.3.5.1.2.1
11/06/2018 15:27:53 (23 ms) : SNMP Datatype: ASN_OCTET_STR
11/06/2018 15:27:53 (28 ms) : -------
11/06/2018 15:27:53 (33 ms) : Value: 20
11/06/2018 15:27:53 (38 ms) : Done

So zabbix don't want to get this value and i don't know how to convert it, in Hex or Bit

And also use a trigger to easely get a report of the problem.

Thanks for help.

[kernbug]

Hi,
According to https://support.zabbix.com/browse/ZBXNEXT-1888 try using DISPLAY-HINT defined for the corresponding MIB object.
Or use external check for parsing hex string. Also find this https://support.zabbix.com/browse/ZBX-2452, but it is for old versions of Zabbix.

[Naillik]

Hi and Thanks

Sorry if i'm misunderstand, (i'm new to zabbix and don't have a perfect english) but i don't understand how or where, i can change (in Zabbix, the item or administration) the Oa or DISPLAY-HINT defined for the corresponding MIB object.
Or maybe will i use the Preprocessing steps to convert the value.I work on zabbix 3.4.9.

Thanks for reply

[kernbug]

Hi and Thanks

Sorry if i'm misunderstand, (i'm new to zabbix and don't have a perfect english) but i don't understand how or where, i can change (in Zabbix, the item or administration) the Oa or DISPLAY-HINT defined for the corresponding MIB object.
Or maybe will i use the Preprocessing steps to convert the value.I work on zabbix 3.4.9.

Thanks for reply

Here you can find working script to deal with parsing hex with whitespaces:

https://support.zabbix.com/browse/ZBXNEXT-505

Also there is an ability to choose data type HEX in item settings: https://www.zabbix.com/documentation...fig/items/item

[keminc]

Hello everyone, and thanks to people unsubscribed above ZBXNEXT-505. There is a little problem with 0x00 symbol in the SNMP, answer, so there is a little modified JS for converts HEX to String, for Zabbix data collectors prototypes and items.

For discovery group:

var regex = /"{#SNMPVALUE}":"([0-9 A-F ]*) "}/;
var m;
do{
m = regex.exec(value);
if (m) { var str = ''; hex = m[1];
hex = hex.replace(/ /g,'');
for (var n = 0; n < hex.length; n += 2) {
if (hex.substr(n, 2) != '00'){ str += String.fromCharCode(parseInt(hex.substr(n, 2), 16)); }
}
value = value.replace(m[1], str);
}

} while (m);
return (value);

And for prototypes of items:

var str1 = value;
var hex = str1.toString();
if (! hex.match(/\b[0-9A-F ]{6}\b/gi)) {
return str1;
} else {
hex = hex.replace(/ /g,"");
var str = '';
for (var n = 0; n < hex.length; n += 2) { str += String.fromCharCode(parseInt(hex.substr(n, 2), 16)); }
return str; }