This presentation is about apache mynewt real time operating system. This also provides the bluetooth low energy api used for various profiles like Generic Attribute, Generic Access Profiles and etc

1. MYNEWT RTOS
Overview

2. Introduction
• An OS to build, deploy and securely manage
smart devices
• An OS to develop application for microcontroller
devices like connected locks, lights & wearables.
• Open source networking stacks
– Bluetooth Low Energy
– Bluetooth Mesh
– Wi-Fi
– LoRaWAN
• Ready your IoT network with remote monitoring,
troubleshooting, management and upgrade

3. Features
• Flexible, powerful BLE 5 implementation
• LoRa PHY and LoRaWAN support
• Bluetooth Mesh
• Native support for TCP/IP, UDP
• Supports protocol for constrained networks
– Constrained Application Protocol ( CoAP )
– IPv6 Low-power Personal Area Network (6LowPAN)

4. Architecture

5. Apache Mynewt
• Fully open source Bluetooth Low Energy stack
with both Host and Controller implementation
• Pre-emptive, multi-tasking Real Time
Operating System Kernel
• Hardware Abstraction Layer
– Abstracts MCU’s peripheral functions
– Easier to develop write cross platform code
• Networking stacks : BLE & Thread
• Scheduled Processing

6. NimBLE Components
• Controller
– Physical Layer
– Link Layer
• Host
– Logical Link Control and Adaptation protocol
– Security Manager (SM)
– Attribute Protocol (ATT)
– Generic Attribute Protocol (GATT)
– Generic Access Profile (GAP)
– Host Controller Interface (HCI)

7. BLE Security Model
• Pairing
• Bonding
• Device Authentication
• Encryption
• Message Integrity
• Bluetooth LE association
– Just works
– Numeric comparision
– Out of band
– Passkey entry

8. NimBLE GATT Server
• ble_gatt_add_svcs
• ble_gatts_svc_set_visibility
• ble_gatts_count_cfg
• ble_gatts_find_chr
• ble_gatts_find_dsc
• ble_gatts_find_svc

9. NimBLE GATT Client
• ble_gattc_disc_all_chrs
• ble_gattc_disc_all_dscs
• ble_gattc_disc_all_svcs
• ble_gattc_read
• ble_gattc_write
• ble_gattc_indicate
• ble_gattc_notify

10. NimBLE GAP
• ble_gap_adv_active
• ble_gap_adv_rsp_set_data
• ble_gap_adv_rsp_set_fields
• ble_gap_adv_set_data
• ble_gap_adv_set_fields
• ble_gap_adv_start
• ble_gap_adv_stop
• ble_gap_conn_active
• ble_gap_conn_cancel
• ble_gap_conn_find
• ble_gap_conn_rssi
• ble_gap_connect
• ble_gap_disc

11. NimBLE Projects
• blinky
– Simple application which provides a basic
interface to LED.
• bleprph
– Basic peripheral device with no user interface
• blemesh
– Sample application for Bluetooth mesh node using
on/off model

12. Thank You