The two days of learning nRF51822 experience

Bluetooth features: 1, small range, low power consumption. 2.4GHZ ism  bandwidth. NORDIC semiconductors are sig  members. 2, Low-power Bluetooth features: Coin-cell battery can be used for one year, a small amount of memory requirements, fast connection and stop can achieve 1mbit/s  signal processing speed, 4DBM transmission power, 40RF channel. Three common channels: discovery, Connection, broadcast. 37 Data channels. 3, Link Layer Overview:   broadcast: Can connect or not connect                   Looking for: Activation or password                   Service: According to connection role      & nbsp;            Host: Based on connection role                   31 bit broadcast load                  21 Bits per pack load                  aes-128: password 4, optional interval 5ms to 4S 5, att&nbsp ; Overview: Attribute protocol: All data hosted and applied, fast and easy to rely on connection logic.                Customer and service data structures: service-provided data, customer-required information.        handle–  in att Table index, using ATT to transmit data protocol units.        uuid– globally unique identifier(UUID) is a standard 128-bit format for string IDs        permissions–  operations read, write, encrypt, and verify.        value–  customer read or write data. 6, gatt  common attribute configuration file, manage all profiles (configuration file), processing and discovering different attributes.     includes: service, features, description. 7, gap  General processing configuration file     can command BR, EPR and ble. In charge of the BLE configuration file. Handling, discovering, connecting equipment.     Role: Peripheral (slave) center (master) broadcast (advertiser) query (scanner) 8, profile  profile: Optional stack features, description of special applications. Special GATT services are required. There are various: profiles I think they are like a good example, the use of a simple change can be used for example: human blood pressure agent profiles, Wireless HID profiles (wireless mouse, wireless keyboard), battery detection profiles. Heart Rate agent profiles. The characteristic    of nRF51822 Compatible official Nrf51822-ek PCA10001.  ·  Compatible 2.4 GHz nrf24l series Chip ·  Support for Bluetooth low energy  Current shunt monitor (CSM) for galvanic detection ·  PCB Printed Antenna ·  Acceleration Meter ·  Gyroscope ·  Micro Vibration Motor ·  Five independent programmable led  Two user keys ·    Standard 10pin SWD Debugging interface (normal Jlink) · Support for iOS application nRF51822 (128kB) will bring the same industry's first multi-protocol wireless capabilities and optimized for ultra-low-power wireless applications of the 32-bit ARM CORTEX-M0 processor for the Bluetooth low-power mode to bring -92.5db RX sensitivity, for all modes to bring the highest Up to +4dbm output power, so that the link budget is up to the industry's leading generation of Nordic chip 9.5dBm, and 3V battery to bring lower than 10mA peak current, so that the battery life continued for several months or years (depending on the application). As with the existing nRF51822, the new nRF51822 128kB can be completely compatible with Nordic existing NRF24L series ICS (integrated circuits or chips). All the above are official but the surprise to me is that it turns the Bluetooth protocol into BIN format and burns it into the chip. The user makes the download BLE Softdevice use the inside API to invoke the corresponding function. I learned here this time. Http://www.eeboard.com/bbs/thread-27104-1-1.html