Raspberry

1 Overview

最大 TF 卡： https://elinux.org/RPi_SD_cards

2 Login

Username: pi
Password: raspberry

3 Image

3.1 Raspberry PI 3B

Raspbian-4.1
raspberrypi-jessie-WAZIUP-demo.dmg.zip
2019-04-08-raspbian-stretch-lite.zip

3.2 Raspberry Model A/B

raspberrypi-jessie-WAZIUP-demo.dmg.zip (HomeAssist)

3.3 Notes

Write image into SD card

$ sudo dd bs=1m if=2019-04-08-raspbian-stretch-lite.img of=/dev/rdisk2 conv=sync

Make SD card into a img file

$ dd if=/dev/mmc0 | gzip -9 > sd-all.img.gz
$ gzip -dc /tmp/sd-all.img.gz | sudo dd of=/dev/mmc0

Mount the img

sudo apt-get install dosfstools dump parted kpartx
sudo losetup /dev/loop0 2019-04-08-raspbian-stretch-lite.img
mkdir -p /mnt/a/boot/
mkdir -p /mnt/a/root/
sudo kpartx -av /dev/loop0 
boot="/dev/mapper/loop0p6"
root="/dev/mapper/loop0p7"
sudo mount $boot /mnt/a/boot/
sudo mount $root /mnt/a/root/

sudo kpartx -d /dev/loop0
sudo losetup -d /dev/loop0

3.4 Backup the System into img

#!/bin/sh
sudo apt-get install -y dosfstools parted kpartx rsync

df=`df -P | grep /dev/root | awk '{print $3}'`
dr=`df -P | grep /dev/mmcblk0p1 | awk '{print $2}'`
df=`echo $df $dr |awk '{print int(($1+$2)*1.2)}'`

sudo dd if=/dev/zero of=raspberrypi.img bs=1K count=$df

sudo parted raspberrypi.img --script -- mklabel msdos

start=`sudo fdisk -l /dev/mmcblk0| awk 'NR==10 {print $2}'`
start=`echo $start's'`
end=`sudo fdisk -l /dev/mmcblk0| awk 'NR==10 {print $3}'`
end2=$[end+1]
end=`echo $end's'`
end2=`echo $end2's'`

sudo parted raspberrypi.img --script -- mkpart primary fat32 $start $end
sudo parted raspberrypi.img --script -- mkpart primary ext4 $end2 -1

loopdevice=`sudo losetup -f --show raspberrypi.img`
device=`sudo kpartx -va $loopdevice | sed -E 's/.*(loop[0-9])p.*/\1/g' | head -1`
device="/dev/mapper/${device}"
partBoot="${device}p1"
partRoot="${device}p2"
sudo mkfs.vfat $partBoot
sudo mkfs.ext4 $partRoot
sudo mount -t vfat $partBoot /media
sudo cp -rfp /boot/* /media/
sudo umount /media
sudo mount -t ext4 $partRoot /media/
cd /media
sudo rsync -aP --exclude="raspberrypi.img" --exclude=/media/* --exclude=/sys/* --exclude=/proc/*  --exclude=/tmp/* / ./

# replace PARTUUID
opartuuidb=`blkid -o export /dev/mmcblk0p1 | grep PARTUUID`
opartuuidr=`blkid -o export /dev/mmcblk0p2 | grep PARTUUID`
npartuuidb=`blkid -o export ${device}p1 | grep PARTUUID`
npartuuidr=`blkid -o export ${device}p2 | grep PARTUUID`
echo "BOOT uuid old=$opartuuidb -> new=$npartuuidb"
echo "ROOT uuid old=$opartuuidr -> new=$npartuuidr"
sudo sed -i "s/$opartuuidr/$npartuuidr/g" $dst_boot_path/cmdline.txt
sudo sed -i "s/$opartuuidb/$npartuuidb/g" $dst_root_path/etc/fstab
sudo sed -i "s/$opartuuidr/$npartuuidr/g" $dst_root_path/etc/fstab

cd
sudo umount /media
sudo kpartx -d $loopdevice
sudo losetup -d $loopdevice

4 Pinout

4.1 Model A and B

4.2 Models A+, B+, PI 2 B, PI 3 B

5 Serial

5.1 Enable

/boot/cmdline.txt
 "console=serial0,115200" 

/boot/config.txt
enable_uart=1

5.2 Disable

 Remove  "console=serial0,115200"  from /boot/cmdline.txt

If you want to use the uart as IO device, add "enable_uart=1" into /boot/config.txt

Or you can do it by run "sudo raspi-config" , enter "Advanced Options" and then enter "Serial" ....

5.3 Connections

RASP_TXD --- HEX_TX
RASP_RXD --- HEX_RX

6 GPIO Control

https://makezine.com/projects/tutorial-raspberry-pi-gpio-pins-and-python/

7 Timezone

$ cat /etc/timezone
Etc/UTC
$ sudo echo "Asia/Shanghai" > /etc/timezone

add following into /etc/profile:

TZ=Asia/Shanghai
export TZ

 $ sudo reboot

8 Static IP

add following into /etc/dhcpcd.conf:

interface eth0
static ip_address=192.168.1.45/24
static routers=192.168.1.1
static domain_name_servers=192.168.1.1

9 ESP8266/ESP8089

Note that the CH_PD signal is connected to the ID_SD signal. This must be mapped as a GPIO (GPIO0) and switched to an output and driven low then switched to an input again before the driver is loaded in order to reset the module. This will be added in the near future in the driver.

https://github.com/al177/esp8089

https://hackaday.io/project/8678/instructions?page=1

10 WiFi access-point

 $ sudo apt-get install hostapd dnsmasq

11 Bluetooth

 $ sudo apt-get install bluetooth bluez
 $ sudo apt-get install python-bluez

12 2G/3G/4G

 $ sudo apt-get install python-gammu gammu wvdial

13 GPS

 $ sudo apt-get install gpsd gpsd-clients

14 Qemu

$ sudo apt install qemu qemu-system-arm
$