J1939

Energy efficiency is the most important design goal for wireless sensor networks (WSNs). In this paper, we propose an energy-efficient cooperative MIMO scheme, which combines energy-efficient LEACH (EE-LEACH) protocol and cooperative MIMO. We name it as EE-LEACH-MIMO scheme. EE-LEACH is an improved LEACH algorithm, in which the network is partitioned to sectors with equal angle for avoiding the distribution non-uniformity of cluster heads. In EE-LEACH-MIMO scheme, the location and the residual energy of each node are considered when the cluster heads for clustering and cooperative nodes for MIMO system are chosen. For comparisons, LEACH, EE-LEACH, the simple cooperative scheme with LEACH and MIMO (LEACHMIMO), and EE-LEACH-MIMO scheme are simulated. The result shows that EE-LEACH-MIMO scheme can well balance the network load, save energy and prolong the network lifetime

在stc51单片机上，timer0、timer1、timer2的控制(In the stc51 microcontroller, timer0, Timer1, timer2 control)

nrf2401M16无线模块开发案例，很实用哦(nrf2401 wireless module development case)

iic接口的程序，可以用于f149单片机(iic interface procedures can be used F149 microcontroller)

STM32单片机freemodbus的移植，主从机的都有(1, transplant FreeModbus1.5 and RT-Thread1.1.1 to STM322, development platform supports Eclipse, Keil, IAR3, can be used in the Eclipse plug-in version management EGIT 4, support Modbus RTU (ASCII untested))

串口下发至数码管显示，本程序已通过编译，可直接使用(Serial issued to the digital display, the program has been compiled, can be used directly)

数字量-模拟量转换器，可以实现单片机处理的数字量信号转换成模拟量电压电流信号输出(Digital analog converter)

单片机实例学习，可以轻松学习单片机.请大家仔细专研。(SCM instance learning, you can easily learn microcontroller. To please carefully researched.)

51单片机模拟PS2鼠标KEIL C51程序，单片片机采用STC12C系列，代码注释详细， (51 single-chip analog PS2 mouse KEIL C51 program, a single piece of machine with STC12C series of code comments in detail,)

超声波测距模块扩展实验，使用超声波传感器，把数据结果显示在1602上。(Ultrasonic Ranging Module extension experiments using ultrasonic sensors, and display data results in 1602.)