telemetry receiver

When it comes to data encryption, these words are often involved:Algorithm, Original, secret, and key. Generally, the sender uses an encryption algorithm to encrypt the original text and then sends it to the receiver. Then, the receiver decrypts the ciphertext with the key to obtain the original text. Since common encryption algorithms are public, the key to the original text encryption is the key. Encrypti

When it comes to data encryption, these words are often involved: algorithms, original texts, passwords, and keys. Generally, the sender uses an encryption algorithm to encrypt the original text and then sends it to the receiver. Then, the receiver decrypts the ciphertext with the key to obtain the original text. Since common encryption algorithms are public, the key to the original text encryption is the k

I. Overview of the Android broadcast mechanismAndroid broadcasts are divided into two areas: the broadcast sender and the broadcast receiver, usually broadcastreceiver refers to the broadcast recipient. Broadcast as a means of communication between Android components, you can use the following scenarios:1. Message communication within the same component inside the same app (between single or multiple threads);2. Message communication between different

Requestpeers () to get a list of the most recent peer-network (devices). Wifi_p2p_state_changed_action This broadcast is sent when the device's Wi-Fi peer is enabled or disabled. This broadcast is sent when the device's Wi-Fi peer is enabled or disabled. Wifi_p2p_this_device_changed_action This broadcast is sent when the details of the device are modified, such as the name of the device. 2. Create a broadcast

is the binary form of the data, the connection layer is the signal form of the data. It would be interesting to see the world in a different way, and it would be more like a whole to look at the four layers.When the data is sent through these four layers, the data is used as the body after each layer, and the control information of this layer is added as the header. When the destination is reached, this passes through layer four, each layer will be stripped of the corresponding header, and fina

Basic Principles of connectable objects and connection points In order to provide greater interaction between the component object and the customer, the component object also needs to actively communicate with the customer. The Component Object communicates with the customer through the outgoing interface. If a component object defines one or more output interfaces, this component object is called a connectable object. The so-called outbound interface is also a COM interface. Each outbound Inte

as an object, thereby letting-parameterize clients with different requests, queue or log request s, and support undoable operations Encapsulates a request as an object, allowing you to parameterize a client call based on a different request, queue, or log request, and to support undo operations Personal preference for the latter explanationUML Class DiagramParticipants commands, Command interface Concretecommand, the concrete command implements the object, the virtual impl

--------------------------------------------------------------------------------Author: Zhu ZheAuthor ProfileZhu Yu, male, Nanjing, Jiangsu Province, Lecturer, main research direction: Information System and integration technology. You can contact the author via qizhu003@msn.com.Content summaryCompared with desktop applications, JMS Web-oriented applications have special user requirements: the same message must be consumed by several unknown users, therefore, the message

The command mode is also a common mode in development. It is not too difficult and relatively simple. Let's write the command mode in detail below. Advantages 1. Reduce the Coupling Degree of the system. 2. New commands can be easily added to the system. 3. You can easily design a combined command.Disadvantages Using the command mode may cause some systems to have too many specific command classes. Because a specific command class needs to be designed for each command, some systems may need a la

Reprint Please specify source: http://blog.csdn.net/llew2011/article/details/51152723In the previous article, we combined the experiment to explain the use of broadcastreceiver existing security problems and give the corresponding solution, if you have not read the previous article click here, The final solution is to use the official V4 package of the Localbroadcastmanager to solve, the official said that this way is not only safe and more efficient, today we are from the source of the angle to

As in the previous article, only the results are presented here, and the code analysis is given later Introduction: This article describes how to first in some fake anti-virus software, viruses, conventional software to obtain text messages Note: If you want to receive a message first, please be sure to read my previous article to ensure that your application starts first It is well known that the Android system sends a broadcast when it receives a short message, but the broadcast is an order

service received your request.In our lab, it's convenient to have a transit person come to you with a bell, and then put the information you want to tell and which lab to record. Very convenient.In the Android world, the way is a little different.The start of the service, found on the internet, there are two methods, one is in the use case of the setup to start, a boot on the start of the service. Here we choose the first type, the second one has not been tested, so dare not to be able to be su

The multiple input multiple output (Multiple-input, Multiple-output;mimo) technology provides an excellent way to extend the range of the Wireless area Network (WLAN), and has recently become the focus. MIMO technology began in 1985, but only now applies to wafer-level devices to dramatically improve transmission range and capacity. Since MIMO is not a single concept, but consists of a variety of wireless RF technology, so we must fully understand the operation and performance of MIMO. When app

(Broadcastreceiver) is used to receive broadcast intent, and the broadcast intent is sent by calling Context.sendbroadcast (), Context.sendorderedbroadcast () To achieve. Typically a broadcast intent can be received by multiple broadcast receivers subscribed to this intent, which is similar to topic message recipients in JMS. The method to implement a broadcast receiver is as follows:The first step: Inherit Broadcastreceiver and override the OnReceiv

Document directory Source code Source code Source code Command mode is the behavior mode of the object. The command mode is also called action mode or transaction mode. In command mode, a request or operation is encapsulated into an object. The command mode allows the system to parameterize the client using different requests, queue requests or record request logs, and provides command revocation and recovery functions.Command mode structure 　　Command mode is the encapsulation of command

the risk of errors. The server system needs to run continuously for a long time, and the accumulation of operations may eventually have a major impact on the entire server. The iis server provides external services in multi-thread mode, which is relatively stable. However, experienced web server managers usually regularly check and restart the servers, to prevent unexpected faults. 3. asynchronous mode Synchronous and asynchronous mechanisms in network communication are the concepts of communic

In the previous article, we analyzed the process of receiver receiving data in detail, and sent the meta-information of data to Receivertracker during receiver receiving data:This article will analyze the architecture design and concrete implementation of receivertracker in detail. First,the main function of Receivertracker The main functions of Receivertracker are:1.start receivers on the executor2.accept

One: the definition of the command pattern---> Command mode is a high-cohesion mode---> Encapsulates a request into an object, allowing you to parameterize the client with different requests, queue requests, or log request logs to provide undo and redo functions for the command.Role of---> Command modeReceive receiver role ==> this role is the role of the job, the command is delivered here should be executedcommand commands the role ==> all the comman