GATT prepare/execute write with NCS

Question

Hi 
 I'm using the nRF Connect SDK v2.7.0 in central/client role to write data into a characteristic on a peer device. 
 I've seen that the function bt_gatt_write() automatically uses the prepare-/execute-write-requests when an offset is used or the data-length is bigger than the MTU size. 
 Are there also a publicly available GATT functions to use prepare- and execute-write-requests on purpose? 
 I'm asking this because these requests would also allow to prepare-writes for different handles and execute them all at once (which seems not possible with bt_gatt_write()). 
 Many thanks in advance. 
 Best regards 
 Remo

Susheel Nuguru · Accepted Answer

I am sorry, I had to delete my previous reply and sorry for making your comment hang in there. I was wrong as the functions I mentioned were not publicly available to the application in the newer version of the sdk. the functions I mentioned aren’t available in the newer SDK version for direct use in applications. bt_gatt_write() does indeed handle cases where the data size exceeds the MTU by leveraging prepare and execute requests, but it doesn’t allow grouping multiple writes across different handles in a single transaction. 
 If you need to work with multiple handles like this, One option is to set up your application to handle each bt_gatt_write() call in sequence—one per handle—and then wait for each write's callback to confirm completion before moving to the next. This would give you a managed sequence of writes, even though they’re individual transactions. This sounds like a compromise but an option nevertheless.

GATT prepare/execute write with NCS

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