diff --git a/RFXtrx/__init__.py b/RFXtrx/__init__.py
index 081c78d..dd8c253 100644
--- a/RFXtrx/__init__.py
+++ b/RFXtrx/__init__.py
@@ -533,7 +533,7 @@ def __init__(self, pkt):
         self.values = {}
         self.pkt = pkt
         if isinstance(pkt, lowlevel.Undecoded):
-            self.values['Payload'] = pkt.payload
+            self.values['Payload'] = pkt.payload.hex()
         if isinstance(pkt, lowlevel.RfxMeter):
             self.values['Counter value'] = pkt.value
         if isinstance(pkt, (lowlevel.Temp, lowlevel.TempHumid,