Prepare Write Request

[Milan]

Hi Team,

Is there any example to understand Prepare Write Request/Prepare Write Response?

In ble_uart_app example, I am getting p_ble_evt->header.evt_id = 2 if I put printf in default case in on_ble_evt function.

Regards,

Milan Joshi

[shibshab]

Is it S110 or S120 you are working with?

My recommendation would be to look at the SDK documentations Message Sequence Charts first. If you want automated control (the simplest appproach) you let the softdevice take care of the data copying. NOTE: In this case you need a buffer bigger than the data you are going to hold! ceil(BUF_SIZE/18)*24 + 2 would be a sufficient size for the buffer in this case.

[shibshab]

First of all you should use the nRF-Sniffer. Its easier to get an overview with, and it uses Wireshark, so you can just send the log files instead of having to do screenshots.

Anyway, what value have you set for the length of the characteristic? The ble_gatts_attr_t.max_len can not be bigger than 512.