How to use MCP APP to read and write long attribute

How to use MCP APP to read and write long attributehttps://devzone.nordicsemi.com/f/nordic-q-a/25302/how-to-use-mcp-app-to-read-and-write-long-attributeI 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 anyen-USTelligent Community 13Wed, 20 Sep 2017 10:35:08 GMTRE: How to use MCP APP to read and write long attributehttps://devzone.nordicsemi.com/thread/99704?ContentTypeID=1Wed, 20 Sep 2017 10:35:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:da4743bc-c318-44d8-8101-65a06347fcedBjørn Kvaale<p>Take a look at this <a href="https://devzone.nordicsemi.com/question/5998/writing-long-characteristic-values/">case</a>. Should be very helpful</p><div style="clear:both;"></div>