raspberry pi (1) prepare

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1. find IP of raspberry pi
   ping raspberrypi.local
   PING raspberrypi.local (192.168.1.101) 56(84) bytes of data.
   64 bytes from 192.168.1.101 (192.168.1.101): icmp_seq=1 ttl=64 time=0.394 ms

2. ssh to raspberry
   user:password
   pi:raspberry
   ssh [email protected]

3. wlan
   sudo vi /etc/wpa_supplicant/wpa_supplicant.conf
   country=CN
   network={
   ssid=“xxxxx”
   psk=“yyyyyy”
   }
   (xxxxx为wifi帐号如TP-LINK_abcd，yyyyyy为wifi密码）

   sudo reboot

   ifconfig
   wlan0 Link encap:Ethernet HWaddr b8:27:eb:c0:6d:a3
   inet addr:192.168.1.103 Bcast:192.168.1.255 Mask:255.255.255.0
   inet6 addr: fe80::bb68:8b17:bccb:7a34/64 Scope:Link
   UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
   RX packets:412 errors:0 dropped:195 overruns:0 frame:0
   TX packets:181 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:97727 (95.4 KiB) TX bytes:26970 (26.3 KiB)

   ssh [email protected]
   测试联网
   ping baidu.com
   PING baidu.com (220.181.57.216) 56(84) bytes of data.
   64 bytes from 220.181.57.216: icmp_seq=1 ttl=53 time=20.8 ms
   64 bytes from 220.181.57.216: icmp_seq=2 ttl=53 time=24.0 ms

4. 配置
   sudo raspi-config

                                         ┌─────────────────────────────┤ Raspberry Pi Software Configuration Tool (raspi-config) ├──────────────────────────────┐
                                         │                                                                                                                      │ 
                                         │                  1 Change User Password Change password for the default user (pi)                                    │ 
                                         │                  2 Hostname             Set the visible name for this Pi on a network                                │ 
                                         │                  3 Boot Options         Configure options for start-up                                               │ 
                                         │                  4 Localisation Options Set up language and regional settings to match your location                 │ 
                                         │                  5 Interfacing Options  Configure connections to peripherals                                         │ 
                                         │                  6 Overclock            Configure overclocking for your Pi                                           │ 
                                         │                  7 Advanced Options     Configure advanced settings                                                  │ 
                                         │                  8 Update               Update this tool to the latest version                                       │ 
                                         │                  9 About raspi-config   Information about this configuration tool                                    │ 
                                         │                                                                                                                      │ 
                                         │                                                                                                                      │ 
                                         │                                                                                                                      │ 
                                         │                                  <Select>                                  <Finish>                                  │ 
                                         │                                                                                                                      │ 
                                         └──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘ 
   

5. IO口，T形扩展板和面包板