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:

10-00-0A-03-‘a’-‘t’-‘I’

Message Type: 0x10 (Command)

Command ID: 0x0A00

Command Payload Length: 3 bytes

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

This will cause the ATI command to be executed, which will return basic system information.

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