Update PySNMP (Slim is now deprecated)

requirements.txt

@@ -2,7 +2,8 @@
 # Install with: pip install -r requirements.txt
 
 # SNMP library for asynchronous SNMP operations
-pysnmp>=6.0.0
+# Note: pysnmp 7.x uses a new API structure (no more Slim class)
+pysnmp>=7.0.0
 
 # MQTT client library for connecting to MQTT brokers
 paho-mqtt>=1.6.0

snmp2mqtt.py

@@ -1,7 +1,9 @@
 #!/bin/env python3
 import asyncio
-from pysnmp.hlapi.asyncio.slim import Slim
+from pysnmp.hlapi.asyncio import (
-from pysnmp.smi.rfc1902 import ObjectIdentity, ObjectType
+    get_cmd, CommunityData, UdpTransportTarget, ContextData, 
+    SnmpEngine, ObjectIdentity, ObjectType
+)
 import logging
 import random
 from paho.mqtt import client as mqtt_client
@@ -204,25 +206,34 @@ def publish(topic, client, data, retain, qos):
 
 
 async def get_snmp(req):
+    """Asynchronously retrieve SNMP data from device using new pysnmp API"""
     data = {}
+    
+    # Create SNMP engine and transport target
+    snmpEngine = SnmpEngine()
+    authData = CommunityData(req["snmp_community"])
+    transportTarget = UdpTransportTarget((req["ip"], 161))
+    contextData = ContextData()
+    
     for oid in req["oids"]:
-        with Slim(1) as slim:
+        try:
-            errorIndication, errorStatus, errorIndex, varBinds = await slim.get(
+            # Perform async SNMP GET operation
-                req["snmp_community"],
+            errorIndication, errorStatus, errorIndex, varBinds = await get_cmd(
-                req["ip"],
+                snmpEngine,
-                161,
+                authData,
-                ObjectType(ObjectIdentity(oid["oid"])),
+                transportTarget,
+                contextData,
+                ObjectType(ObjectIdentity(oid["oid"]))
             )
 
             if errorIndication:
-                logging.error(errorIndication)
+                logging.error(f"{req['device_name']} SNMP error indication: {errorIndication}")
+                continue
             elif errorStatus:
                 logging.error(
-                    "{} at {}".format(
+                    f"{req['device_name']} SNMP error status: {errorStatus.prettyPrint()} at {errorIndex and varBinds[int(errorIndex) - 1][0] or '?'}"
-                        errorStatus.prettyPrint(),
-                        errorIndex and varBinds[int(errorIndex) - 1][0] or "?",
-                    )
                 )
+                continue
             else:
                 for varBind in varBinds:
                     logging.debug(f"{req['device_name']} {oid['name']} => {oid['type'](varBind[1])}")
@@ -233,7 +244,11 @@ async def get_snmp(req):
                             data.update({oid["name"]: "OFF"})
                     else:
                         data.update({oid["name"]: oid["type"](varBind[1])})
-    logging.debug(f"JSON : {json.dumps(data)}")
+        except Exception as e:
+            logging.error(f"{req['device_name']} Exception getting OID {oid['oid']}: {e}")
+            continue
+    
+    logging.debug(f"{req['device_name']} JSON : {json.dumps(data)}")
     return data