整理by @BI7JTA Q群交流 174212528

扩展：经验证可以在 n2n 网络使用，方便没有公网IP的HAM部署节点。

官方教程：
https://github.com/simonyiszk/openwebrx
实现效果：http://sdr.hu  （列表不用翻墙）
深圳节点：http://szsdr.ddns.net:8073/ （只支持4个在线）

openwebrx Raspberry pi部署
编译环境：raspberry 3
$ uname -a
Linux raspberrypi 4.4.50-v7+ #970 SMP Mon Feb 20 19:18:29 GMT 2017 armv7l GNU/Linux

python openwebrx.py
You can now open the GUI at http://localhost:8073.

Please note that the server is also listening on the following ports (on localhost only):

port 4951 for the multi-user I/Q server.
Now the next step is to customize the parameters of your server in config_webrx.py.

重启命令：（官方）
sudo killall -9 openwebrx rtl_mus csdr rtl_sdr

查看状态：
http://bi7jta.myq-see.com:8073/status
直接访问：
http://bi7jta.myq-see.com:8073/#freq=14270000,mod=usb

如果不行，则：
sudo killall rtl_sdr
sudo killall csdr
sudo killall nmux
事实证明不一定有效，正确的方法：
ps -ef |grep sdr   |sudo kill -9 xxx (TODO 这里写成脚本)
ps -ef |grep nmux  |sudo kill -9 xxx

netstat –nltp |grep 4951 |sudo kill -9 xxx
netstat –nltp |grep 8073 |sudo kill -9 xxx
netstat –nltp |grep 8091

telnet知识学习 查看端口是否可用
sudo apt-get install -y telnet
netstat -anp |grep 4951 
telnet 127.0.0.1 4951
ctrl+]    
quit

在线访问：
http://10.0.254.156:8073/ 默认支持20个用户，实测2个web连接 树莓派1GHz的CPU占用 80%

后台服务：
https://github.com/simonyiszk/openwebrx/wiki

问题：nohub 运行会出现客户端中断后（待机），服务端挂掉。
分析：别的web客户端能否访问？其他终端正常，
解决：尝试用vnc，终端前端运行
 client 0x15f33c0: CS_THREAD_FINISHED, client_goto_source = 2, errno = 32csdr bandpass_fir_fft_cc: filter initialized, low_cut = -0.331675, high_cut = 0.331675
client 0x15f33f0: CS_THREAD_FINISHED, client_goto_source = 2, errno = 32  File "openwebrx.py", line 488, in do_GET
    rxws.send(self, temp_audio_data, "AUD ")
  File "/home/pi/openwebrx/rxws.py", line 164, in send
    myself.wfile.write(header+data_to_send)
  File "/usr/lib/python2.7/socket.py", line 324, in write
    self.flush()
  File "/usr/lib/python2.7/socket.py", line 303, in flush
    self._sock.sendall(view[write_offset:write_offset+buffer_size])
  File "openwebrx.py", line 628, in do_GET
    id_to_close=get_client_by_id(myclient.id,False)
  File "openwebrx.py", line 344, in get_client_by_id
    raise ClientNotFoundException
Traceback (most recent call last):
  File "/usr/lib/python2.7/SocketServer.py", line 599, in process_request_thread
    self.finish_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/usr/lib/python2.7/SocketServer.py", line 657, in __init__
    self.finish()
  File "/usr/lib/python2.7/SocketServer.py", line 716, in finish
    self.wfile.close()
  File "/usr/lib/python2.7/socket.py", line 279, in close
    self.flush()
  File "/usr/lib/python2.7/socket.py", line 303, in flush
    self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe

非正常关闭时，客户端提示：
WebScoket error
WebSocket ha closed unexpectedly. Please reload the page
刷新后解决
常见问题：https://github.com/simonyiszk/openwebrx/wiki/Common-problems-and-their-solutions

---------------------
Support SDRplay https://github.com/simonyiszk/openwebrx/wiki/Using-SoapySDR-via-rx_tools-with-OpenWebRX

下载：SDRplay_RSP_API-RPi-2.13.1.run
https://www.sdrplay.com/downloads/
安装：
https://www.rs-online.com/designspark/building-a-remote-sdr-with-the-pi-3-model-b-and-sdrplay-rsp2

pi@3bplus:~ $ cd ../..
pi@3bplus:~ $ git clone https://github.com/pothosware/SoapySDRPlay.git
pi@3bplus:~ $ cd SoapySDRPlay
pi@3bplus:~ $ mkdir build
pi@3bplus:~ $ cd build
pi@3bplus:~ $ cmake ..
pi@3bplus:~ $ make

pi@3bplus:~ $ sudo make install
pi@3bplus:~ $ SoapySDRUtil --find
----------------------

python2 openwebrx.py