How to use MCP APP to read and write long attribute

[Lezard]

I want to write data longer than 20 bytes on Android MCP. But if I use "write command", only 20 bytes data can by successfully written. The rest data is lost. If I use "write request", it returns error response "GATT WRITE NOT PERMIT". Is there any method to write long attribute with MCP?

[Bjørn Kvaale]

Take a look at this case. Should be very helpful