block-wise reading for sml power meter serial data for speed-up after performance problems

Author: grillbaer

Diff for: powermetersmlobis.py

@@ -164,7 +164,7 @@ def _run(self) -> None:
     def _step(self) -> None:
         self._open_serial()
         try:
-            data = self._serial.read()
+            data = self._serial.read(1024)
         except SerialException as err:
             self._close_serial()
             return
@@ -214,7 +214,7 @@ def _print_callback(reader: PowerMeterSmlObisReader):
 
 
     def _serial_factory():
-        return Serial(port="/dev/ttyUSB0", baudrate=9600)
+        return Serial(port="/dev/ttyUSB0", baudrate=9600, timeout=0.2)
 
 
     reader = PowerMeterSmlObisReader(serial_factory=_serial_factory)

Diff for: signalsourcesconfig.py

@@ -28,7 +28,7 @@
 pigpio_pi = pigpio.pi()
 
 power_meter_heat = PowerMeterApatorEC3Repeating(PowerMeterApatorEC3("/dev/serial0"), 10, 2*60)
-power_meter_household = PowerMeterSmlObisReader(serial_factory=lambda: Serial(port="/dev/ttyUSB0", baudrate=9600))
+power_meter_household = PowerMeterSmlObisReader(serial_factory=lambda: Serial(port="/dev/ttyUSB0", baudrate=9600, timeout=0.2))
 
 
 def power_meter_hh_map_func(identifier: str, pmeter: PowerMeterSmlObisReader, _: Any) -> SignalValue: