好消息是目前 Pi 4 有小改版，型號為 v1.2。根據 theregister 的報導，新版修正了 USB-C 的供電問題，可適用大部分的充電線(器)。此外，新版還進行了絲印的調整，可以減少焊接過程中發生錫橋。
檢查的方式是在命令列執行 cat /proc/cpuinfo，如果是 Pi4/4GB 在版本號(Revision)的部份會顯示 c03112，型號(Model)會顯示 Raspberry Pi 4 Model B Rev 1.2 就是新版(v1.2)。如果在 Revision 顯示 c03111，Model 顯示 Raspberry Pi 4 Model B Rev 1.1 那就是舊版(v1.1)。我們販售的 Pi 4 都是新版。
pi@raspberrypi:~ $ cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
...
Hardware : BCM2835
Revision : c03112
Serial : 10000000abb7260c
Model : Raspberry Pi 4 Model B Rev 1.2
The official and recommended USB-C power supply for Raspberry Pi 4
《規格》
* 45 X 48 X 27mm (不含線長及插頭長)
* 線長：約 1.5M(18 AWG captive cable)
* 插頭類型：USB Type-C
* Input：96V-264V AC
* Output：5.1V DC up to 3.0 A
* 輸出功率：15.3W
* 具短路、過載及過熱保護
* 顏色：黑色 / 白色隨機出貨
An accessory board that provides temperature, light, and humidity sensing for IoT applications.
《Description》
The Environmental Sensor Board is an add-on board (also known as a pHAT or bonnet) that adds sensing capabilities to your Coral Dev Board or Raspberry Pi projects. It provides atmospheric data such as light level, barometric pressure, temperature, and humidity. You can also attach additional sensors with the Grove connectors.
Works with Google Cloud IOT Core
The inclusion of a secure element allows it work with Google’s Cloud IOT Core.
Expandable input
Four integrated Grove connectors allow you to add additional sensors.
Compatible with Coral and Raspberry Pi boards
The 40-pin connector fits onto the Coral Dev Board, Dev Board Mini, or any Raspberry Pi board (the Environmental Sensor Board includes an EEPROM for identification on Raspberry Pi boards).
《Tech specs》
Display： 128×32 OLED display
Security： Microchip ECC608 crypto chip with Google keys
Humdity： HDC2010 humidity sensor
Light： OPT3002 ambient light sensor
Barometric： BMP280 barometric pressure sensor
Connections： Four Grove connectors, UART, I2C, PWM
Power： 3.3/5V analog
Certifications： European Union (CE), Hong Kong (CE), United States (FCC)
2019-06-20:
* Based on Debian Buster
* Support for Raspberry Pi 4 hardware
* FKMS OpenGL desktop graphics driver and xcompmgr compositing window manager used when running on Raspberry Pi 4
* Screen Configuration application added for use with FKMS driver
* Raspberry Pi 4 video output options added to Raspberry Pi Configuration
* Uses new PiXflat UI theme for GTK and Openbox
* CPU activity gauge plugin no longer shown on taskbar by default
* CPU temperature gauge plugin added (not shown by default)
* USB ejecter and Bluetooth taskbar icons hidden when not appropriate
* Version 74.0.3729.157 of Chromium web browser included
* Version 32.0.0.207 of Flash player included
* IDLE Python IDE removed
* Wolfram Mathematica removed temporarily due to incompatibility with Buster
* Display of package sizes removed from Recommended Software
* Appearance Settings modified to support independent settings for two monitors
* Oracle Java 7 and 8 replaced with OpenJDK 11
* Miscellaneous small bug fixes
* On-board 5GHz WiFi blocked by rfkill by default
The block is removed when taking one of the following actions:
- Selecting a locale in the first run wizard
- Setting the WiFi country in the Raspberry Pi Configuration tool or the Network Settings applet
- Setting the WiFi country in raspi-config
- Providing a wpa_supplicant.conf file through the boot partition
- Running 'rfkill unblock wifi'
* Boot partition size set to 256M
* Linux kernel 4.19.50
* Raspberry Pi firmware 88ca9081f5e51cdedd16d5dbc85ed12a25123201
cd ~/
wget https://dl.google.com/coral/edgetpu_api/edgetpu_api_latest.tar.gz -O edgetpu_api.tar.gz --trust-server-names
tar xzf edgetpu_api.tar.gz
cd edgetpu_api
bash ./install.sh
