Solve log problem in payload. (#1334)

Author: janiversen

CHANGELOG.rst

@@ -1,5 +1,6 @@
 version 3.1.3
 ----------------------------------------------------------
+* Solve log problem in payload.
 * Fix register type check for size bigger than 3 registers (6 bytes) (#1323)
 * Re-add SQL tests. (#1329)
 * Central logging. (#1324)

pymodbus/payload.py

@@ -108,7 +108,7 @@ def to_registers(self):
             payload = [unpack(self._byteorder + "H", value)[0] for value in payload]
         else:
             payload = [unpack(fstring, value)[0] for value in payload]
-        Log.debug(payload)
+        Log.debug("{}", payload)
         return payload
 
     def to_coils(self):
@@ -296,7 +296,7 @@ def fromRegisters(  # pylint: disable=invalid-name
         :returns: An initialized PayloadDecoder
         :raises ParameterException:
         """
-        Log.debug(registers)
+        Log.debug("{}", registers)
         if isinstance(registers, list):  # repack into flat binary
             payload = b"".join(pack("!H", x) for x in registers)
             return cls(payload, byteorder, wordorder)