Experimental Physics and
Industrial Control System

Well spotted, that could indeed be the issue.  In particular try INTEGER: (with the colon), that's the "mask" the code will be looking for in the reply returned from the slave, which occurs directly before the value it's supposed to parse out.

That should work in this case.  Some devices return strings like 'INTEGER: on(1)' where you need to specify the mask as '(' in order to find where the integer to parse out actually is.

 

On 5/6/2014 12:27 PM, Eric Norum wrote:

Disclaimer — I know very little about SNMP.  

But I do see a possible issue.

In the version that works you’re asking for an INTEGER — which is what the snmpget and snmpwalk show as well.

field(INP,  "@MailScanner warning: numerical links are often malicious: 145.239.84.45 public SNMPv2-SMI::enterprises.38783.3.9.0  INTEGER: 100”)

In the version that fails you’re asking for a Float — which doesn’t match.  

field(INP,  "@MailScanner warning: numerical links are often malicious: 192.168.58.96 public  SNMPv2-SMI::enterprises.18248.1.1.1.0  Float: 100”)

Try changing the ‘Float’ in the INP field to ‘INTEGER’ and see if that helps.

On May 6, 2014, at 9:00 AM, Nicoletta Petrella <[email protected]> wrote:

Dear all,

 

I have got installed a TME - Ethernet Thermometer, (http://www.papouch.com/en/shop/product/tme-ip-ethernet-thermometer/) which supports SNMP protocol, and I would like to read the temperature using EPICS with devSnmp.

 

My simple database is

record(ai, "TME:TempTimes10")

{

    field(DESC, "TME Temperarature sensor")

    field(DTYP, "Snmp")

    field(INP,  "@MailScanner warning: numerical links are often malicious: 192.168.58.96 public  SNMPv2-SMI::enterprises.18248.1.1.1.0  Float: 100")

    field(EGU,  "degrees C")

    field(LINR, "LINEAR")

    field(SCAN, "1 second")

    field(HIHI, "250")

    field(HHSV, "MAJOR")

 

}

 

The ioc runs ok without errors,  but with caget I only get 0 as temperature’s value, and with camonitor I get the value is INVALID

 

-bash-4.1$ camonitor TME:TempTimes10

TME:TempTimes10                2014-05-06 16:43:11.479828 0 READ INVALID

 

 

I posted a similar question a while ago for a different monitor, and at that time I solved  the problem using an OID name as given back from snmpget, but this solution does not work this time.

 

-bash-4.1$ snmpget -v1 -c public 192.168.58.96 1.3.6.1.4.1.18248.1.1.1.0

SNMPv2-SMI::enterprises.18248.1.1.1.0 = INTEGER: 182

-bash-4.1$

The OID name seems to be ok, so I cannot understand why I keep obtaining 0 as a value from caget, and I can get right value from snmp.

 

The same ioc works ok with a different module and with the following database

record(ai, "TCW122B:Temp1Times10")

 

{

    field(DESC, "Temperarature sensor 1")

    field(DTYP, "Snmp")

    field(INP,  "@MailScanner warning: numerical links are often malicious: 145.239.84.45 public SNMPv2-SMI::enterprises.38783.3.9.0  INTEGER: 100")

    field(EGU,  "degrees C")

    field(LINR, "LINEAR")

    field(SCAN, "1 second")

    field(HIHI, "250")

    field(HHSV, "MAJOR")  

}

 

Could anyone help me to understand why I get always 0 using caget but I get right value from snmpget?

Thank you very much.

Kind regards,

Nicoletta

 

The snmpwalk gives

 

-bash-4.1$ snmpwalk -v1 -c public 192.168.58.96

SNMPv2-MIB::sysDescr.0 = STRING: TME

SNMPv2-MIB::sysObjectID.0 = OID: ccitt.9.43.6.1.4.1

DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (10197595) 1 day, 4:19:35.95

SNMPv2-MIB::sysContact.0 = STRING:

SNMPv2-MIB::sysName.0 = STRING:

SNMPv2-MIB::sysLocation.0 = STRING:

SNMPv2-MIB::sysServices.0 = INTEGER: 12

IF-MIB::ifNumber.0 = INTEGER: 1

IF-MIB::ifIndex.1 = INTEGER: 1

IF-MIB::ifDescr.1 = STRING: Network

IF-MIB::ifType.1 = INTEGER: ethernetCsmacd(6)

IF-MIB::ifMtu.1 = INTEGER: 1500

IF-MIB::ifSpeed.1 = Gauge32: 10000000

IF-MIB::ifPhysAddress.1 = STRING: 0:20:4a:c9:63:bd

IF-MIB::ifAdminStatus.1 = INTEGER: up(1)

IF-MIB::ifOperStatus.1 = INTEGER: up(1)

IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00

IF-MIB::ifInOctets.1 = Counter32: 13254469

IF-MIB::ifInUcastPkts.1 = Counter32: 185466

IF-MIB::ifInNUcastPkts.1 = Counter32: 0

IF-MIB::ifInDiscards.1 = Counter32: 0

IF-MIB::ifInErrors.1 = Counter32: 0

IF-MIB::ifInUnknownProtos.1 = Counter32: 0

IF-MIB::ifOutOctets.1 = Counter32: 356137879

IF-MIB::ifOutUcastPkts.1 = Counter32: 11019

IF-MIB::ifOutNUcastPkts.1 = Counter32: 665

IF-MIB::ifOutDiscards.1 = Counter32: 0

IF-MIB::ifOutErrors.1 = Counter32: 0

IF-MIB::ifOutQLen.1 = Gauge32: 2

IP-MIB::ipForwarding.0 = INTEGER: notForwarding(2)

IP-MIB::ipDefaultTTL.0 = INTEGER: 31

IP-MIB::ipInReceives.0 = Counter32: 44978

IP-MIB::ipInHdrErrors.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipInAddrErrors.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipForwDatagrams.0 = Counter32: 0

IP-MIB::ipInUnknownProtos.0 = Counter32: 0

IP-MIB::ipInDiscards.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipInDelivers.0 = Counter32: 44984

IP-MIB::ipOutRequests.0 = Counter32: 0

IP-MIB::ipOutDiscards.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipOutNoRoutes.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipReasmTimeout.0 = INTEGER: 0 seconds

IP-MIB::ipReasmReqds.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipReasmOKs.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipReasmFails.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipFragOKs.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipFragFails.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipFragCreates.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::ipAdEntAddr.192.168.58.96 = IpAddress: 192.168.58.96

IP-MIB::ipAdEntIfIndex.192.168.58.96 = INTEGER: 1

IP-MIB::ipAdEntNetMask.192.168.58.96 = IpAddress: 255.255.255.0

IP-MIB::ipAdEntBcastAddr.192.168.58.96 = INTEGER: 1

IP-MIB::ipAdEntReasmMaxSize.192.168.58.96 = INTEGER: 0

IP-MIB::icmpInMsgs.0 = Counter32: 0

IP-MIB::icmpInErrors.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpInDestUnreachs.0 = Counter32: 0

IP-MIB::icmpInTimeExcds.0 = Counter32: 0

IP-MIB::icmpInParmProbs.0 = Counter32: 0

IP-MIB::icmpInSrcQuenchs.0 = Counter32: 0

IP-MIB::icmpInRedirects.0 = Counter32: 0

IP-MIB::icmpInEchos.0 = Counter32: 0

IP-MIB::icmpInEchoReps.0 = Counter32: 0

IP-MIB::icmpInTimestamps.0 = Counter32: 0

IP-MIB::icmpInTimestampReps.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpInAddrMasks.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpInAddrMaskReps.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutMsgs.0 = Counter32: 0

IP-MIB::icmpOutErrors.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutDestUnreachs.0 = Counter32: 120

IP-MIB::icmpOutTimeExcds.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutParmProbs.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutSrcQuenchs.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutRedirects.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutEchos.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutEchoReps.0 = Counter32: 0

IP-MIB::icmpOutTimestamps.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutTimestampReps.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutAddrMasks.0 = Wrong Type (should be Counter32): INTEGER: 0

IP-MIB::icmpOutAddrMaskReps.0 = Wrong Type (should be Counter32): INTEGER: 0

UDP-MIB::udpInDatagrams.0 = Counter32: 24553

UDP-MIB::udpNoPorts.0 = Counter32: 3526

UDP-MIB::udpInErrors.0 = Counter32: 13349

UDP-MIB::udpOutDatagrams.0 = Counter32: 494

 

 

 

 

..... @@ ........
....@(';')@.......
..0==/--\==0.... 
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-- 
Eric Norum
[email protected]

-- 
John A. Priller             | Phone : (517) 908-7375
MSU Cyclotron Laboratory    | Fax   : (517) 908-7126
640 S. Shaw Lane room 1300D | Email : [email protected]
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