Writing to PLC

[JasonDevloo]

If I am reading from a opcua server:
go run .\read\read.go -endpoint opc.tcp://localhost:4840 -node 'ns=4;s=|var|NX3005.Application.O99.O22_LB20.GT21.MV'
And I get:
&ua.DataValue{EncodingMask:0xd, Value:(*ua.Variant)(0xc0000646c0), Status:0x0, SourceTimestamp:time.Date(2024, time.May, 29, 9, 51, 38, 273000000, time.UTC), SourcePicoseconds:0x0, ServerTimestamp:time.Date(2024, time.May, 29, 9, 51, 38, 272000000, time.UTC), ServerPicoseconds:0x0}

Or browse:
go run .\browse\browse.go -endpoint opc.tcp://localhost:4840 -node 'ns=4;s=|var|NX3005.Application.O99.O22_LB20.GT41.MV'

Name;Type;Addr;Unit (SI);Scale;Min;Max;Writable;Description
MV;float32;"ns=4;s=|var|NX3005.Application.O83.O25_LB20.GT41.MV";;;;;false;

How would I write to that same endpoint? What should be my value? When I try:
go run .\write\write.go -endpoint opc.tcp://localhost:4840 -node 'ns=4;s=|var|NX3005.Application.O99.O22_LB20.GT21.MV' -value 42
I get:
The value supplied for the attribute is not of the same type as the attribute's value. StatusBadTypeMismatch (0x80740000)