WSMBS is a powerful and simple to use .Net Control that makes it easy to access data from a Modbus slave device connected to the PC’s serial port. Simply drop the Control on your form and talk to your device with your VB.NET, C# or Managed C++.
You may redistribute the wsmbt.dll assembly with your application program unlimited without any royalty.
Supported protocol variants
Modbus RTU
Modbus ASCII
SUPPORTED MODBUS FUNCTIONS
01: Read coil status
02: Read input status
03: Read holding registers
04: Read input registers
05: Force single coil
06: Preset single register
15: Force multiple coils
16: Preset multiple registers
17: Report Slave ID.
22: Mask write register
23: Read/Write registers
User defined functions
Read User Defined Coils
Read User Defined Registers
Write User Defined Coils
Write User Defined Registers
Whats New
Updates: official site does not provide any info about changes in this version
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https://www.modbustools.com/modbus_wsmbs.html
️ Modbus WSMBS 2.5.0 (781.58 KB) 
(781.58 KB)
RapidGator Link(s)
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Drop Link(s)
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https://drop.download/f6kr4iuqz344/Modbus.WSMBS.V2.5.0.Incl.Keymaker.CORE.rar