diff --git a/lib/Hoymiles/src/HoymilesRadio.cpp b/lib/Hoymiles/src/HoymilesRadio.cpp
index ceab39d..9764ea2 100644
--- a/lib/Hoymiles/src/HoymilesRadio.cpp
+++ b/lib/Hoymiles/src/HoymilesRadio.cpp
@@ -273,8 +273,7 @@ void HoymilesRadio::dumpBuf(const char* info, uint8_t buf[], uint8_t len)
         Serial.print(String(info));
 
     for (uint8_t i = 0; i < len; i++) {
-        Serial.print(buf[i], 16);
-        Serial.print(" ");
+        Serial.printf("%02X ", buf[i]);
     }
     Serial.println(F(""));
 }
\ No newline at end of file
diff --git a/lib/Hoymiles/src/commands/CommandAbstract.cpp b/lib/Hoymiles/src/commands/CommandAbstract.cpp
index 3d41b64..9ef9ad5 100644
--- a/lib/Hoymiles/src/commands/CommandAbstract.cpp
+++ b/lib/Hoymiles/src/commands/CommandAbstract.cpp
@@ -23,8 +23,7 @@ void CommandAbstract::dumpDataPayload(Stream& stream)
 {
     const uint8_t* payload = getDataPayload();
     for (uint8_t i = 0; i < getDataSize(); i++) {
-        stream.print(payload[i], HEX);
-        stream.print(" ");
+        stream.printf("%02X ", payload[i]);
     }
     stream.println("");
 }