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12 Firmware and OTA Updates
This section documents how to enable firmware updates in the design, whether it is serial or Over The Air (OTA)
12.3 Device Firmware Upgrade Over BLE
12.3.3 Microchip Defined BLE OTA DFU Profile

Introduction
1 Getting Started with WBZ451 Curiosity Board
This section covers the evaluation board features and running the preprogrammed demo example.
2 Getting Started with Software Development
This section gives a detailed information on the steps to install IDE, compiler, tool chain, BLE, Zigbee stacks and application examples on the PC.
3 Bluetooth Low Energy Applications
This section provides details on documentation describing the steps to test and develop the precompiled BLE application examples.
4 Getting Started with Zigbee Applications
5 Getting Started with Multiprotocol Applications
This section describes steps to test and develop the precompiled BLE and Zigbee coexistence application examples.
6 Flashing hex from MPLAB DISCOVER using MPLAB IPE
This section provides a detailed procedure of how to download an already existing application hex file from MPLAB DISCOVER and flash the hex file into WBZ451 Curiosity Board using MPLAB IPE.
7 Getting Started with IEEE 802.15.4 P2P Phy Application
8 Getting Started with IEEE 802.15.4 MAC Applications
9 Adding Chip Peripherals
This section describes how to add analog/digital peripherals to the application
10 Thread Applications
11 Low Power Design
This section explains in detail on how to enable the low power modes – Sleep/Standby or Deep Sleep/Backup modes in the design.
12 Firmware and OTA Updates
This section documents how to enable firmware updates in the design, whether it is serial or Over The Air (OTA)
- 12.1 Bootloader
- 12.2 Device Firmware Upgrade Over Serial
- 12.3 Device Firmware Upgrade Over BLE
- 12.4 Device Firmware Upgrade Over Zigbee Link
- 12.5 Microchip Utility Tool
  Microchip Utility Tool is windows based GUI Tool used for firmware upgrade.
13 Wireless System Services API
14 Support Documentation
This section has documentation that is generic and used as supporting document with the application example documentation.
15 Porting Guide for WBZ451 to PIC32CX1012BZ25048
16 Porting Guide for WBZ451 to WBZ450
Microchip Information

12.3.3 Microchip Defined BLE OTA DFU Profile

The BLE OTA DFU profile is a GATT based profile. It is designed to perform device firmware update over the air. In general mobile will perform the OTAU client role and the BLE device will be in server role. OTAU service is a Microchip’s propriety service with a 16-byte service UUID. There shall be only one instance of the OTAS in a device. The OTAS shall be instantiated as a «Primary Service». The service Universally Unique Identifier (UUID) value shall be set to «4D434850-253D-46B3-9923-E61B8E8215D7»

There are 3 characteristics defined under the service:


Characteristic Name	Universally Unique Identifier (UUID)	Properties	Permissions
OTA Feature	4D434850-22E4-4246-AF03-0C4A2F906358	Read	Encryption required
OTA Data	4D434850-34D9-40A6-BA7E-56F57C8CD478	WriteWithoutResponse, Notify	Encryption required
OTA Control Point	4D434850-9327-45DE-8882-C97F39028A76	Write	Encryption required

Further details on OTAU service and profile can be found in stack documents:

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.