fix(snmp): resolve TypeScript type errors for Deno strict mode

- Add Buffer import from node:buffer to manager.ts and types.ts
- Fix error handling type assertions (error/retryError/stdError as unknown)
- Add explicit type annotation to byte parameter in isPrintableAscii check
- All tests now passing (3 SNMP tests + 10 logger tests)

ts/snmp/manager.ts

@@ -1,4 +1,5 @@
 import * as snmp from "npm:net-snmp@3.20.0";
+import { Buffer } from "node:buffer";
 import type { IOidSet, ISnmpConfig, TUpsModel, IUpsStatus } from './types.ts';
 import { UpsOidSets } from './oid-sets.ts';
 
@@ -245,7 +246,7 @@ export class NupstSnmp {
         // Handle specific types that might need conversion
         if (Buffer.isBuffer(value)) {
           // If value is a Buffer, try to convert it to a string if it's printable ASCII
-          const isPrintableAscii = value.every(byte => byte >= 32 && byte <= 126);
+          const isPrintableAscii = value.every((byte: number) => byte >= 32 && byte <= 126);
           if (isPrintableAscii) {
             value = value.toString();
           }
@@ -335,10 +336,10 @@ export class NupstSnmp {
     } catch (error) {
       if (this.debug) {
         console.error('---------------------------------------');
-        console.error('Error getting UPS status:', error.message);
+        console.error('Error getting UPS status:', error instanceof Error ? error.message : String(error));
         console.error('---------------------------------------');
       }
-      throw new Error(`Failed to get UPS status: ${error.message}`);
+      throw new Error(`Failed to get UPS status: ${error instanceof Error ? error.message : String(error)}`);
     }
   }
 
@@ -373,7 +374,7 @@ export class NupstSnmp {
       return value;
     } catch (error) {
       if (this.debug) {
-        console.error(`Error getting ${description}:`, error.message);
+        console.error(`Error getting ${description}:`, error instanceof Error ? error.message : String(error));
       }
       
       // If we're using SNMPv3, try with different security levels
@@ -424,11 +425,11 @@ export class NupstSnmp {
         return value;
       } catch (retryError) {
         if (this.debug) {
-          console.error(`Retry failed for ${description}:`, retryError.message);
+          console.error(`Retry failed for ${description}:`, retryError instanceof Error ? retryError.message : String(retryError));
         }
       }
     }
-    
+
     // Try with noAuthNoPriv as a last resort
     if (config.securityLevel === 'authPriv' || config.securityLevel === 'authNoPriv') {
       const retryConfig = { ...config, securityLevel: 'noAuthNoPriv' as 'noAuthNoPriv' };
@@ -443,11 +444,11 @@ export class NupstSnmp {
         return value;
       } catch (retryError) {
         if (this.debug) {
-          console.error(`Retry failed for ${description}:`, retryError.message);
+          console.error(`Retry failed for ${description}:`, retryError instanceof Error ? retryError.message : String(retryError));
         }
       }
     }
-    
+
     return 0;
   }
 
@@ -478,7 +479,7 @@ export class NupstSnmp {
       return standardValue;
     } catch (stdError) {
       if (this.debug) {
-        console.error(`Standard OID retry failed for ${description}:`, stdError.message);
+        console.error(`Standard OID retry failed for ${description}:`, stdError instanceof Error ? stdError.message : String(stdError));
       }
     }
     

ts/snmp/types.ts

@@ -2,6 +2,8 @@
  * Type definitions for SNMP module
  */
 
+import { Buffer } from "node:buffer";
+
 /**
  * UPS status interface
  */