Modbus Single Phase meter

First follow the comment of Rossko57.

Since OH3 I only use the UI, except this SDM120. You could try to use my .things file, change your parameters accordingly. But don’t expect this solves the error.

Bridge modbus:serial:endpointSDM120 [port="/dev/ttyUSBMODBUS",baud=9600,id=1,dataBits=8,parity="none",stopBits="1.0",encoding="rtu"] {
    Bridge poller inputRegisters [ start=0, length=80, refresh=600, type="input" ] {
        Thing data Voltage                       "Voltage" @ "Mains"                            [ readStart="0", readValueType="float32" ]
        Thing data Current                       "Current" @ "Mains"                             [ readStart="6", readValueType="float32" ]
        Thing data ActivePower                   "Active Power" @ "Mains"                        [ readStart="12", readValueType="float32" ]
        Thing data ApparentPower                 "Apparent Power" @ "Mains"                      [ readStart="18", readValueType="float32" ]
        Thing data ReactivePower                 "Reactive Power" @ "Mains"                      [ readStart="24", readValueType="float32" ]
        Thing data PowerFactor                   "Power Factor" @ "Mains"                        [ readStart="30", readValueType="float32" ]
        Thing data PhaseAngle                    "Phase Angle" @ "Mains"                          [ readStart="36", readValueType="float32" ]
        Thing data Frequency                     "Frequency" @ "Mains"                            [ readStart="70", readValueType="float32" ]
        Thing data ImportActiveEnergy            "Import Active Energy" @ "Mains"                 [ readStart="72", readValueType="float32" ]
        Thing data ExportActiveEnergy            "Export Active Energy" @ "Mains"                [ readStart="74", readValueType="float32" ]
        Thing data ImportReactiveEnergy          "Import Reactive Energy" @ "Mains"              [ readStart="76", readValueType="float32" ]
        Thing data ExportReactiveEnergy          "Export Reactive Energy" @ "Mains"             [ readStart="78", readValueType="float32" ]
        
	}}