ble transmitter

Last year, noridc developed a chip that integrates Bluetooth 4.0 and can communicate with 24l01. The film encapsulation can be very small, and the power consumption is very low. It is very suitable for wearable devices, so I recently had a set of second-hand ak ii and no becon board. I first played some basic peripherals, And now I started to develop ble. Under the official SDK directory, we can find the project file Nordic \ nrf51822 \ board \ pca100

BLE-NRF51822 tutorial 3-SDK framework profiling. BLE-NRF51822 tutorial 3-SDK program framework profiling nordicBLE technology exchange group 498676838 this lecture introduces the framework and won't involve too much code details. 51822 of the official SDK is actually no framework according to the BLE-NRF51822 tutorial 3-sdk program framework analysis NordicBLE t

Android Bluetooth 4.0 Development1. Permissions and related attributes"android:required=" true "means that the APK is only running on a system with Bluetooth_le properties, and this 4.3 before the Android system2, the program to open the mother to operate Bluetooth before the first to determine whether BLE supportif (!getpackagemanager (). Hassystemfeature (Packagemanager.feature_bluetooth_le)) {Toast.maketext (this,r.string.ble_not_supported, Toast.l

Reference: http://blog.chinaunix.net/uid-28852942-id-5753308.html Explain 2 points: 1, why the Nordic of the 4.0 protocol stack ble can only send 20 bytes of application load data. 2. How to improve the sending rate when a large amount of data is sent Analysis of transmission rate of BLE According to the Bluetooth BLE protocol, the transfer rate of the physical

This blog post last modified: January 06, 2017, 11:06. First, Introduction This paper describes how to collect the temperature and humidity value of DHT11 in Simplebleperipheral Engineering. second, the experimental platform Protocol stack version: ble-cc254x-1.4.0 Compiling software: IAR 8.20.2 Hardware platform: Smart RF (main chip CC2541) three . Copyright notice Bo Main: Sweet melon Statement: Water do not forget to dig well people, reproduced

This blog post last modified: January 06, 2017, 11:06. First, Introduction This article takes simplebleperipheral as an example to introduce how to customize the normal IO port (P12) as a key. Note: This article adds the key method does not conflict with the protocol stack's key, the protocol stack to carry the key to still be able to use normally. second, the experimental platform Protocol stack version: ble-cc254x-1.4.0 Compiling software: IAR 8.2

The previous article describes the communication between the Android phone and the BLE terminal, while the most common ble terminal should be the ibeacon base station advocated by Apple. Ibeacon technology based on BLE, it is characterized by the broadcast of external messages, mobile phones do not need to connect to the Ibeacon base station can also obtain its i

I am implementing a application on Android using BLE Api (SDK), and I had a issue that the transfer data process is de Lay very slow. This is my log. 03-12 16:20:05.121:d/bluetoothgatt (13578): writecharacteristic ()-UUID: ... 03-12 16:20:06.272:d/bluetoothgatt (13578): Oncharacteristicwrite ()-device= ... Uuid= ... Status=0 03-12 16:20:06.972:d/bluetoothgatt (13578): writecharacteristic ()-UUID: ... 03-12 16:20:08.254:d/bluetoothgatt (

This article from http://blog.csdn.net/hellogv/, reference must indicate the source! Last time I talked about communication between Android phones and BLE terminals, and the most common BLE terminal should be the iBeacon base station proposed by Apple. IBeacon is based on BLE. It is characterized by sending messages externally through broadcasting. Mobile phones

I. Overview of bluetooth BLE (Bluetooth low energy) Introduction Bluetooth Low Energy (BLE) technology is a low-cost, short-range, interoperable robust wireless technology that works in a licensed 2.4GHz-ism RF band. It was designed to be ultra low power (ULP) wireless technology from the outset. The three characteristics of Bluetooth low energy technology have achieved ULP performance

(true); }/** * Stop searching for devices * / Public void Stopscanledevice() {if(Lescancallback = =NULL)return; Scanledevice (false); }/** * Search for Bluetooth callbacks */ Public interface lescanlistenter { voidLescancallback (list/** * Get Bluetoothgatt * @param Device devices * @param AutoConnect is automatically linked * @param Bluetoothgattcallback Callback * / PublicBluetoothgattGetconnectgatt(Bluetoothdevice device,BooleanAutoconnect,bluetoothgattcallback bluetooth

BLE-NRF51822 tutorial 9-dynamic password (pairing code) NordicBLE technology exchange group 498676838This tutorial also describes how to modify the dynamic password (actually a pair code) based on the uart example in the sdk. The Uart example is in the following directory: XXX \ Keil_v5 \ ARM \ Pack \ nordicsemicondu\ nRF_Examples \ 9.0.0 \ ble_peripheral \ ble_app_uart Some theoretical knowledge about pairing is introduced in the static password tut

Bluetooth Low-Power BLE: Controls GPIO to light LEDs and blegpio This section describes the simplest and most basic things. The ios operation of the CC2540 uses the PORT as the GPIO. If you don't talk much about it, let's look at it. 1. Hardware Circuit The most simple hardware circuit is to use a GPIO to control the LED light. Since GPIO is used as the output, the GPIO mode is not required. It is quite simple to control the GPIO on the left to switc

(Context.bluetooth_service); Mbluetoothadapter = Bluetoothmanager.getadapter (); if (Mbluetoothadapter = = NULL | |!mbluetoothadapter.isenabled ()) {Intent Enablebluetooth = new Intent ( bluetoothadapter.action_request_enable); Startactivityforresult (Enablebluetooth, 1); } mbluetoothadapter.startlescan (Mlescancallback); } private Bluetoothadapter.lescancallback Mlescancallback = new Bluetoothadapter.lescancallback () {@Override pub

1. The problem now encountered, the phone into hibernation after the wake, the app software and CC2541 communication is not normal, but CC2541 still detect when the connection state. How to solve this problem? Will the activity be recreated after the phone wakes up?2.Wakelock lock Mechanism:Applications can vote on whether the system is standby by applying the Wakelock lock mechanism, and when any application has applied for a wakelock lock, it is not released during standby and the system will

TI ble protocol stack comes with data encryption and decryption function, there are two functions, respectively, are encrypted and decrypted, each function is three parameters, are 16 bytes, if the actual data less than 16 bytes, after the completion of their own, after the encryption via Bluetooth, the other device received this data, inverse, get 16 bytes of data, Take the number of bytes you need (if characteristic value is only 1 bytes, take 1 byt

Recently, with the popularity of smart wearable equipment, intelligent medical care and intelligent home, Bluetooth development is very important in moving. Because of the company's needs, we studied the Bluetooth 4.0 application in Android. Here are some of my summaries. 1. Let me introduce some of the nouns in Bluetooth 4.0:(1), GATT (gneric attibute profile) Through BLE connection, reads and writes the attribute class small Data Profile general

BLE-NRF51822 tutorial 3-SDK framework profiling NordicBLE technology exchange group 498676838This section describes the framework and does not involve too much code details. 51822 of the official sdks are actually not framework-resistant. What is a framework? For example, TI's ble sdk has an operating system abstraction layer (OSAL) which is a round training scheduling. You need to create tasks according

Original URL: http://m.blog.csdn.net/blog/chiooo/43985401BLE Learning RecordAnroid BLE Development, based on Bluetoothlegatt analysis Mbluetoothadapter = Mbluetoothmanager.getadapter (); Get the adapter for the Bluetooth host on your phone mbluetoothadapterpublic Boolean Initialize () {For API level and above, get a reference to bluetoothadapter throughBluetoothmanager.if (Mbluetoothmanager = = null) {Mbluetoothmanager = (Bluetoothmanager) mc

Connection EventsMy study notes on TI's official website are now organized as followsafter two ble devices are connected, all communication events occur through the connection eventswaveform measured from one of the devices with an oscilloscope after establishing a connection for two bleRed is the timeline---the horizontal axis,Power Consumption---black vertical axisThe spike wave is connection Events.the rest of the sleeping is sleep time.Most of the