Raspberry pi: Skills

accessing with Serial >,<

Setting up wifi connection with CMD


Accessing GPIO
On SHELL/BASH
https://luketopia.net/2013/07/28/raspberry-pi-gpio-via-the-shell/

On C++
Wiring Pi
http://atceiling.blogspot.com/2014/02/raspberry-pi-wiringpi-gpio.html

On python

Other Lang: https://elinux.org/RPi_GPIO_Code_Samples

pinout: https://pinout.xyz/pinout/pin8_gpio14
It seems have a little messy on the pin arrangement on the Pi

root@raspberrypi:/sys/class/gpio# pinout
,--------------------------------.
| oooooooooooooooooooo J8     +====
| 1ooooooooooooooooooo        | USB
|                             +====
|      Pi Model 3B V1.2          |
|      +----+                 +====
| |D|  |SoC |                 | USB
| |S|  |    |                 +====
| |I|  +----+                    |
|                   |C|     +======
|                   |S|     |   Net
| pwr        |HDMI| |I||A|  +======
`-| |--------|    |----|V|-------'

Revision           : a02082
SoC                : BCM2837
RAM                : 1024Mb
Storage            : MicroSD
USB ports          : 4 (excluding power)
Ethernet ports     : 1
Wi-fi              : True
Bluetooth          : True
Camera ports (CSI) : 1
Display ports (DSI): 1

J8:
   3V3  (1) (2)  5V
 GPIO2  (3) (4)  5V
 GPIO3  (5) (6)  GND
 GPIO4  (7) (8)  GPIO14
   GND  (9) (10) GPIO15
GPIO17 (11) (12) GPIO18
GPIO27 (13) (14) GND
GPIO22 (15) (16) GPIO23
   3V3 (17) (18) GPIO24
GPIO10 (19) (20) GND
 GPIO9 (21) (22) GPIO25
GPIO11 (23) (24) GPIO8
   GND (25) (26) GPIO7
 GPIO0 (27) (28) GPIO1
 GPIO5 (29) (30) GND
 GPIO6 (31) (32) GPIO12
GPIO13 (33) (34) GND
GPIO19 (35) (36) GPIO16
GPIO26 (37) (38) GPIO20
   GND (39) (40) GPIO21

For further information, please refer to https://pinout.xyz/

Comparision on the speed of the GPIO on different lang
http://codeandlife.com/2012/07/03/benchmarking-raspberry-pi-gpio-speed/

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