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数字中继板的设置方法

Quick Image Building Guide for MT76xx LEDE

This is a very short guide on how to compile your first LEDE snapshot firmware. It does not cover any pitfalls, but provides a quick way if everything goes well.

The development branch can contain experimental code that is under active development and should not be used for production environments. Snapshot images may support additional hardware; however, it is experimental, considered unstable, and sometimes won't compile.

R928 MCU选择

So I would take an MCU F427VI 2M VG 1M or F437VI. But the 429er and 439er go 

ed: 
could mean: 
- prohibited (can not be changed) 
- caution (they leave the reliable region - at your own risk) 

yellow: 
- can go, but need not 
- affect the performance may 

know: 
- this is the default 
- all ok 

orange: 
- stronger warning as yellow 

green: 
- value is in the recommended range

DIY MMDVM 迷你多模式数字通信无线热点 超越DVMEGA

MMDVM 迷你多模式数字对讲机热点(让你的数字对讲机连上互联网):

 

 

 

发射功率<=13mw,频率范围420-470MHZ,862-940MHZ

SMA天线距离远,支持DMR(需要申请ID),P25,YSF,FUSION主流制式

OsmAnd Live Tracking

New versions of Traccar Client use this protocol to report GPS data to the server side.

OsmAnd Live Tracking web address format:

http://demo.traccar.org:5055/?id=123456&lat={0}&lon={1}&timestamp={2}&hdop={3}&altitude={4}&speed={5}

where:

  • demo.traccar.org – server address or domain name (e.g., it can be your server public IP address)
  • 123456 – your device unique identifier (e.g., IMEI number)

CSipSimple使用方法

打开软件,点左下角的钥匙

点增加帐号

选择通用向导的Basic

帐号名称就是电话号码比如888

帐号就是电话号码比如888

服务器输入www.taozhengbo.com

密码输入密码比如888

点保存,可以看到注册成功变绿色就可以打电话了

 

软件功能:

debian安装OpenSIPS服务器

渊源

OpenSIPS(Open SIP Server) fork自大名鼎鼎的OpenSER(Open SIP Express Router)。后来由于开发者的分歧,OpenSER分裂为两个项目,OpenSER因为商标问题改名为Kamailio,另外一些开发者fork了 OpenSER成立了OpenSIPS项目。目前,OpenSIPS和Kamailio差别并不大。

安装

添加OpenSIPS官方源

编辑/etc/apt/source.list,添加

deb http://apt.opensips.org/ testing main

添加源认证密钥
wget http://apt.opensips.org/key.asc
apt-key add key.asc

更新并安装OpenSIPS,使用postgresql作为后端数据库

#apt-get update
#apt-get install opensips opensips-postgres-module

用yate建立VoIP服务器 实现免费语音通话(SIP协议

       网络电话是 下一代网络(NGN)的重要应用之一。“下一代网络”是指10年以后的网络,全部基于软交换(Softswitch)技术。但是,拨打VoIP免费网络电 话,并不需要在等待10年。基于现有的TCP/IP网络,我们已经可以使用开源的VoIP软件,实现PC-to-PC的免费语音通话。(注:这里的“免 费”,是指不需要支付传统语音通话费用,ADSL/FTTB/3G等上网接入仍然是需要费用的)

下面,我将介绍如何用yate软件搭建VoIP服务器,并用SIP协议完成语音通话。在我的实例中,使用了局域网内的3台PC,Windows操作系统,接在同一个集线器上,并不是广域网或3G接入。

yate2建立VoIP服务器

diy pcb

8 pic in zip

Ten Minute Transmitter

Last weekend I was browsing the internet for radio circuits and came across an interesting design I've never seen before, nicknamed the Ten Minute Transmitter.  The design apparently originated in 1996 in an amateur radio club QRP publication.  The name originates since the original author claimed he built this transmitter and make a QSO with it in just 10 minutes time.  Impressive!

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