diff --git a/lib/serialport-parsers.js b/lib/serialport-parsers.js
index a9c7ed2..ce3a2d0 100644
--- a/lib/serialport-parsers.js
+++ b/lib/serialport-parsers.js
@@ -96,7 +96,11 @@ parserReadline.on('data', (data) => {
 
     const pduParsed = parsePdu(data);
     if (pduParsed) {
-        logger.verbose('Got a PDU data', { type: typeof pduParsed });
+        logger.verbose('PDU parsed', { type: pduParsed.getType() });
+    }
+
+    if (pduParsed && pduParsed.getType.getSrr()) {
+        logger.verbose('Got a PDU SMS-DELIVER', { type: pduParsed.getType() });
         onPdu(data, pduParsed);
     } else if (isResultCodeIs(data, 'CSQ')) {
         logger.verbose('Got a signal quality report', { data: data.toString() });