ble i2c

BLE bluetooth communication bluetooth_4.3The demo is primarily compatible with Bluetooth communication between Android4.3 devices that support ble. key features include:1, Bluetooth open, close;2, the surrounding Bluetooth to open the device search, build connected3, after the successful establishment of the connection, through Bluetooth to send messages to each other. Note: This app must be installed on bo

again. But I think it might be a supplement to the public address.This is the private address of the resolvable, the Prand part is a randomly generated 24bit value, the hash portion is generated using the following method:hash = ah(IRK, prand)Ah is an SMP part of the random address generation function, Irk is the key (Identity resolving key), the first randomly generated prand part, and then use this algorithm to generate the hash, and then the hash and Prand part into the corresponding bit reg

Android Bluetooth Low-Power (BLE) is a great tool to get the steps of Xiaomi bracelet, androidble Now the Internet of Things is booming, and Xiaomi's wristband and other products, next we will study the progress Logging Function of Xiaomi's wristband. Tool Package com. zsl. bluetoothdemo. ble; import android. bluetooth. export thadapter; import android. bluetooth. export thdevice; import android. b

This tutorial explains how to use the phone to dynamically modify the device name, the device name after reaching the device to connect to the phone, and then disconnect and then scan to see the new device name. The tutorial is based on Uartdemo under sdk9.0, in the following directory Xxx\keil_v5\arm\pack\nordicsemiconductor\nrf_examples\9.0.0\ble_peripheral\ble_app_ Uart The Nordic protocol stack implementation will have a Generic access service and Generic attribute service by default (some

Debug I2C modules in the near future. I think I am the most familiar with I2C. One is that the Protocol price is simple, and the other is that this module is also available in the set-top box. However, this familiar thing has made me tune it for three days! Some of the failure lessons are summarized as follows to learn from yourself and later. 1. When there is no problem with all the time sequences, I modi

I use the BLE is the ticc2541,1.3.2 protocol stack1, the first thing to note is that the iphone will protect the information, ble device read the iphone address is random, each connection will be different2, below I will specify how to view the phone's MAC addressFirst of all my program is as a slave, from the machine equipped to start broadcasting, event sbp_start_device_evt---> Gaprole_startdevice (SIMPLE

/************************************************************************** * i.mx6 AT24Cxx EEPROM Linu X I2c-gpio * Disclaimer: * Many times when we use the Linux system management hardware, more is through the chip controller, * but sometimes, we will also encounter the chip in the control is not enough, or in the design of the process of accidents, such as no * have thought controller exists, the content of this article is because For the fourth co

1. Communication interface I2C send or receive data in packets struct I2C_MSG encapsulation [CPP] struct I2C_MSG { __u16 addr; From machine address __U16 flags; Sign #define I2c_m_ten 0x0010//10-bit address flag #define I2C_M_RD 0x0001//Receive data markers __u16 Len; Data length __u8 *buf; Data pointers }; Where addr is the address of the machine; flags are the sign of this communication, sending the data as 0, and receiving the data as the number of

Blogger Press: hot day, just loaded from the fifth crossing to the stone room, about 4 kilometers. Finally let me find a coffee house to take a break and continue to write this driver analysis. Single life is boring. Don't complain. Let's show it to yourself! It's difficult to step on at your feet! Continue the whole process !~ First, I have a question in this article, but I have never understood it. I am very grateful to you for writing it here! # Define i2c_m_nostart 0X4000/* If i2c_func_prot

-cbcentralmanagerdelegate//Center management scan to peripheral-(void) Centralmanager: (Cbcentralmanager *) Central Diddiscoverperipheral: (cbperipheral *) Peripheral Advertisementdata: (nsdictionary *) Advertisementdata RSSI: ( NSNumber *) rssi{//The peripheral is saved if (![ Self.peripherals Containsobject:peripheral]) {[Self.peripherals addobject:peripheral]; }}//center Management Connection Peripheral succeeded (void) Centralmanager: (Cbcentralmanager *) Central didconnectperipheral: (cb

The demo is primarily compatible with Bluetooth communication between Android4.3 devices that support ble.Key features include:1, Bluetooth open, close;2, the surrounding Bluetooth to open the device search, build connected3, after the successful establishment of the connection, through Bluetooth to send messages to each other.Note: This app must be installed on both sides to observe the Send/Receive message.:Http://www.dwz.cn/Csa8U and nbsp NBSP ;

When looking at the source code, it generally starts from the entrance of the entire code, and the source code of the Ti ble protocol stack is no exception. Its main () function is the entry of the entire program, which is automatically called when the system powers on. It mainly does the following: (1) underlying hardware Initialization Configuration (2) create a task and initialize the task Configuration (3) Detect and execute valid task events Th

When looking at the source code, it generally starts from the entrance of the entire code, and the source code of the ti ble protocol stack is no exception. Its main () function is the entry of the entire program, which is automatically called when the system powers on. It mainly does the following: (1) underlying hardware Initialization Configuration (2) create a task and initialize the task Configuration (3) Detect and execute valid task events Th

LEDs to OFF. // Set LED GPIOs to outputs. LED1_DDR |= LED1_BV;#if (!defined HAL_PA_LNA !defined HAL_PA_LNA_CC2590) LED2_DDR |= LED2_BV;#if (!defined CC2540_MINIDK !defined HAL_BOARD_CC2540USB) LED3_DDR |= LED3_BV;#endif#endif#if defined BLINK_LEDS HalLedStatusControl.sleepActive = FALSE; // Initialize sleepActive to FALSE.#endif#endif Macro definition /* 1 - Green */#define LED1_BV BV(0)#define LED1_SBIT P1_0#define LED1_DDR

BLE-NRF51822 tutorial 8-dynamic Broadcast This topic describes how to implement dynamic broadcast. The tutorial is based on the Uart example in the 9.0 sdk. To implement dynamic broadcast, choose broadcast> stop broadcast> modify parameters> restart broadcast. Therefore, we use a timer to Periodically disable broadcast and then modify broadcast data before enabling broadcast. In Sdk 9.0, I implemented several broadcast modes, which was a little tro

I. OverviewThe Generic Attribute profile (GATT) defines a service framework using theAttribute Protocol. This framework defines Proceduresand formats of servicesand their characteristics. The proceduresdefined include discovering, reading,Writing, notifying and indicating characteristics, as well asconfiguring theBroadcast of characteristics.Two. ArchitectureThree. att attribute tableFour. GATT profile level1.SERVICE DEFINITION2.INCLUDE DEFINITION3.CHARACTERISTIC DEFINITION1) Characteristic Decl

occurring in the advertising channel.What information advertising can transmitThis is more important, that is, the meaning of the ad type and ad data sections in. Not only advertiser to be clear about which values this part should fill, but the scanner and initiator of interest will parse the values to make the necessary judgments.AD TypeThere are probably 30来 species, and for the sake of coding convenience, the SIG is assigned number for each ad type, which can be directly seen in the number a

[BLE--HID] usb hid device category definitionBrief Introduction HID devices are human-computer interaction devices. Common devices include the mouse, keyboard, and game handle. Generally, the wired connection is connected to the machine device through a USB connection, which serves as the user input device. In bluetooth technology, access to HID devices is wireless. However, the definition of HID is the same, or problems such as device drivers and com

Differences: SPI: high-speed synchronous serial port. 3 ~ 4-line interface, independent and synchronous sending and receiving UART: Universal asynchronous serial port. Bidirectional communication based on the standard baud rate is slow I2C: A three-line serial transmission mode. The communication protocol and usage can be found on the Internet. Bidirectional data transmission with three linesSerial peripheral interfaceUART: Universal asynchronous tra

Briefly SMP is the security Manager Protocol. Its content is mainly pairing and key distribution, and then using key to the link or data encryption. Reference Articles Before you understand the SMP protocol, you need some prior knowledge of BLE security management to refer to:Introduction to the SMP security management of BluetoothPairing method of Bluetooth security management SMSafe l2cap Channel of Bluetooth security management