An advertising packet can be up to 31 bytes of data. Each field (i.e. appearance, name, service UUID or similar) have a header of 2 bytes (length and type), meaning that the maximum user payload is 29 bytes.
When you reach this limit, the ble_advdata_set() method of the SDK will start returning an error, NRF_ERROR_DATA_SIZE (0x0C).
Remember that if you need to transfer additional data before establishing a connection, you can add a scan response, which can contain an additional 31 bytes. A scan response packet can be set by passing a pointer to an addtional ble_advdata_t as the second parameter of ble_advdata_set().
An advertising packet can be up to 31 bytes of data. Each field (i.e. appearance, name, service UUID or similar) have a header of 2 bytes (length and type), meaning that the maximum user payload is 29 bytes.
When you reach this limit, the ble_advdata_set() method of the SDK will start returning an error, NRF_ERROR_DATA_SIZE (0x0C).
Remember that if you need to transfer additional data before establishing a connection, you can add a scan response, which can contain an additional 31 bytes. A scan response packet can be set by passing a pointer to an addtional ble_advdata_t as the second parameter of ble_advdata_set().
hi ole, sry for commenting on an old post, but whats the best way to send an additional custom flag like "hey phones, please connect, i've a new information for you"? Thanks!
hiii ole...
i have a doubt.. u said we can add scan response in advertise data before establishing a connection ryt? suppose am advertising some data (broadcast) even in an active connection why i cannot include scan response?
