OpenHab : WAVESHARE Modbus RTU Relay 16CH

Modbus_RTU_Relay_16CH.items

// WAVESHARE Modbus RTU Relay 16CH : OpenHab : items
Switch RTU_16CH_01 "DC-Relay 01" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_01:switch"}
Switch RTU_16CH_02 "DC-Relay 02" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_02:switch"}
Switch RTU_16CH_03 "DC-Relay 03" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_03:switch"}
Switch RTU_16CH_04 "DC-Relay 04" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_04:switch"}
Switch RTU_16CH_05 "DC-Relay 05" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_05:switch"}
Switch RTU_16CH_06 "DC-Relay 06" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_06:switch"}
Switch RTU_16CH_07 "DC-Relay 07" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_07:switch"}
Switch RTU_16CH_08 "DC-Relay 08" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_08:switch"}
Switch RTU_16CH_09 "DC-Relay 09" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_09:switch"}
Switch RTU_16CH_10 "DC-Relay 10" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_10:switch"}
Switch RTU_16CH_11 "DC-Relay 11" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_11:switch"}
Switch RTU_16CH_12 "DC-Relay 12" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_12:switch"}
Switch RTU_16CH_13 "DC-Relay 13" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_13:switch"}
Switch RTU_16CH_14 "DC-Relay 14" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_14:switch"}
Switch RTU_16CH_15 "DC-Relay 15" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_15:switch"}
Switch RTU_16CH_16 "DC-Relay 16" <switch> {channel="modbus:data:RTU_16CH:RTU_16CH:Relay_16:switch"}

Modbus_RTU_Relay_16CH.sitemap

// WAVESHARE Modbus RTU Relay 16CH : OpenHab : sitemap
sitemap debug16CH label="<WAVESHARE Modbus RTU Relay 16CH>" {
    Frame label="WaveShare 16CH RTU relais" {
        Switch item=RTU_16CH_01 label="Relay 01" icon="switch"
        Switch item=RTU_16CH_02 label="Relay 02" icon="switch"
        Switch item=RTU_16CH_03 label="Relay 03" icon="switch"
        Switch item=RTU_16CH_04 label="Relay 04" icon="switch"
        Switch item=RTU_16CH_05 label="Relay 05" icon="switch"
        Switch item=RTU_16CH_06 label="Relay 06" icon="switch"
        Switch item=RTU_16CH_07 label="Relay 07" icon="switch"
        Switch item=RTU_16CH_08 label="Relay 08" icon="switch"
        Switch item=RTU_16CH_09 label="Relay 09" icon="switch"
        Switch item=RTU_16CH_10 label="Relay 10" icon="switch"
        Switch item=RTU_16CH_11 label="Relay 11" icon="switch"
        Switch item=RTU_16CH_12 label="Relay 12" icon="switch"
        Switch item=RTU_16CH_13 label="Relay 13" icon="switch"
        Switch item=RTU_16CH_14 label="Relay 14" icon="switch"
        Switch item=RTU_16CH_15 label="Relay 15" icon="switch"
        Switch item=RTU_16CH_16 label="Relay 16" icon="switch"
    }
}

Modbus_RTU_Relay_16CH.things

// WAVESHARE Modbus RTU Relay 16CH : OpenHab : things
Bridge modbus:serial:RTU_16CH "RTU 16CH relays" [ id=1, port="/dev/ttyUSB0", baud=9600, stopBits="1.0", parity="none", dataBits=8, receiveTimeoutMillis=75, echo=false, encoding="rtu", timeBetweenTransactionsMillis="70", flowControlIn="none", flowControlOut="none", connectTimeoutMillis=1500, afterConnectionDelayMillis=0, enableDiscovery=false ] {
    Bridge poller RTU_16CH "RTU 16CH relays :: poller" [start=0, length=16, refresh=1000, type="coil" ] {
        Thing data Relay_01 "RTU 16CH relays :: 01" [  readStart="8", readValueType="bit", writeType="coil",   writeStart="0", writeValueType="bit" ]
        Thing data Relay_02 "RTU 16CH relays :: 02" [  readStart="9", readValueType="bit", writeType="coil",   writeStart="1", writeValueType="bit" ]
        Thing data Relay_03 "RTU 16CH relays :: 03" [ readStart="10", readValueType="bit", writeType="coil",   writeStart="2", writeValueType="bit" ]
        Thing data Relay_04 "RTU 16CH relays :: 04" [ readStart="11", readValueType="bit", writeType="coil",   writeStart="3", writeValueType="bit" ]
        Thing data Relay_05 "RTU 16CH relays :: 05" [ readStart="12", readValueType="bit", writeType="coil",   writeStart="4", writeValueType="bit" ]
        Thing data Relay_06 "RTU 16CH relays :: 06" [ readStart="13", readValueType="bit", writeType="coil",   writeStart="5", writeValueType="bit" ]
        Thing data Relay_07 "RTU 16CH relays :: 07" [ readStart="14", readValueType="bit", writeType="coil",   writeStart="6", writeValueType="bit" ]
        Thing data Relay_08 "RTU 16CH relays :: 08" [ readStart="15", readValueType="bit", writeType="coil",   writeStart="7", writeValueType="bit" ]
        Thing data Relay_09 "RTU 16CH relays :: 09" [  readStart="0", readValueType="bit", writeType="coil",   writeStart="8", writeValueType="bit" ]
        Thing data Relay_10 "RTU 16CH relays :: 10" [  readStart="1", readValueType="bit", writeType="coil",   writeStart="9", writeValueType="bit" ]
        Thing data Relay_11 "RTU 16CH relays :: 11" [  readStart="2", readValueType="bit", writeType="coil",  writeStart="10", writeValueType="bit" ]
        Thing data Relay_12 "RTU 16CH relays :: 12" [  readStart="3", readValueType="bit", writeType="coil",  writeStart="11", writeValueType="bit" ]
        Thing data Relay_13 "RTU 16CH relays :: 13" [  readStart="4", readValueType="bit", writeType="coil",  writeStart="12", writeValueType="bit" ]
        Thing data Relay_14 "RTU 16CH relays :: 14" [  readStart="5", readValueType="bit", writeType="coil",  writeStart="13", writeValueType="bit" ]
        Thing data Relay_15 "RTU 16CH relays :: 15" [  readStart="6", readValueType="bit", writeType="coil",  writeStart="14", writeValueType="bit" ]
        Thing data Relay_16 "RTU 16CH relays :: 16" [  readStart="7", readValueType="bit", writeType="coil",  writeStart="15", writeValueType="bit" ]
    }
}

Note:
There is trouble either on firmware of https://www.waveshare.com/wiki/Modbus_RTU_Relay_16CH or a bug on OpenHab.
The readStart differs from write writeStart, see from 1-8 and 8-16...

It is a bug in WaveShares firmware. The device behaves the same with Node Modbus serial.
https://github.com/yaacov/node-modbus-serial