Datasheet

Existing Commands

At present, there are only four SDEP commands implemented in the Bluefruit SPIFRIEND32

firmware:

SDEP_CMDTYPE_INITIALIZE = 0xBEEF

SDEP_CMDTYPE_AT_WRAPPER = 0x0A00

SDEP_CMDTYPE_BLE_UARTTX = 0x0A01

SDEP_CMDTYPE_BLE_UARTRX = 0x0A02

SDEP_CMDTYPE_INITIALIZE can be used to reset the SDEP system when a HW RST line

isn't available.

The two SDEP_CMDTYPE_UART* commands send data over the BLE UART service.

SDEP_CMDTYPE_AT_WRAPPER is the command you will use most of the time, which is a

wrapper that sends AT commands over the binary SDEP transport. This isn't terribly efficient,

and a binary mechanism would have taken less bytes per command, but it allows the reuse

of all of the earlier AT parser commands without having to implement one wrapper for every

command which would significantly increase the overall code size.

SDEP AT Wrapper Usage

To use the SDEP AT Wrapp you simply send the correct header, along with the AT command

you which to send to the parser. For example:

Message Type: 0x10 (Command)

Command ID: 0x0A00

Command Payload Length: 3 bytes

Command Payload: 'a' + 't' + 'i'

0x0000

0x0001

0x0003

Error

Reserved

Invalid CMD ID

Invalid Payload

Description

Reserved for future use

CMD ID wasn't found in the lookup table

The message payload was invalid

10-00-0A-03-‘a’-‘t’-‘I’