How to implement 512 bytes characteristic in peripheral

[Paul]

Do we have any example for implementing a characteristic with more than 20 bytes? Thanks.

[Paul]

Thanks guys, now I "almost totally" understand how it works by your answers.

[Paul]

I am doing some test to verify this now. I have a characteristic set to init_len to 40, and max_len = 40. But on Master Control Panel, it only reads the first 20 bytes when I press "discover services" button. When I press "Read" button in the log window it only shows 20 bytes too. I want to verify I can put more than 20 bytes out before I test my device with Apple devices.

[Paul]

OK, I figured it out. Now I know what does "read long" do. It reads more data than what one data packet can hold. It will send AttReadBlob requests.

[Duoran Li]

what do you change？It reads more data than what one data packet can hold.