Posts

• May 5, 2018

  Build a RasberryPI based ultrasonic distance sensing system

  RasberryPi pins

  

• Apr 30, 2018

  Build a RaspberryPi straming server

  Hardwares needed

  RaspberryPi 3B
  RaspberryPi Camera
  

• Feb 9, 2018

  Caves in My Hometown

  As we know, caves were sanctuary to humankind in remote ages. I always have a special feeling of caves, not because of their grand surprisingly formed structure or the shining stalactites they have, but the memories of them in my childhood.

• Jan 16, 2018

  Golang: Sort unordered slice list by element relations

  Code

  ``` package main

• Jan 15, 2018

  Ubuntu 16.04 network connection drops every few minutes or seconds

  My network info

  ray@ray-pc:~$ sudo lshw -C network
  [sudo] password for ray:
    *-network               
         description: Ethernet interface
         product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
         vendor: Realtek Semiconductor Co., Ltd.
         physical id: 0
         bus info: pci@0000:03:00.0
         logical name: enp3s0
         version: 0c
         serial: 08:62:66:2f:cf:1e
         size: 100Mbit/s
         capacity: 1Gbit/s
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
         configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 ip=192.168.1.115 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
         resources: irq:26 ioport:e000(size=256) memory:f7c00000-f7c00fff memory:f0000000-f0003fff
  

  I have r81618 Ethernet controller, but the driver is r8169, this causes my Ethernet connection drops every few minutes or seconds, the network is very unstable.

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