這問題是 Pi 4 和內建 E-mark 晶片的高階 USB-C 充電線不相容，而這些充電線內建了用以執行CC(Configuration Channel)邏輯檢測與控制的 E-mark 晶片，屬於高階的 USB-C 充電線。因此包括蘋果的 MacBook 或是筆電使用的 USB-C 充電裝置在插到 Pi 4 上會被誤認為音訊轉接配件，因而無法提供電力。
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
Raspberry Pi Jam in Taipei 2020 是一個慶祝樹莓派生日的活動。樹莓派到了今年春天已經是第八年了，所以樹莓派基金會籌劃了這樣的活動：”慶祝來自世界各地的樹莓派的生日”。
從 2/15 和 3/15 這段期間，全球各地會有超過一百個慶祝活動，我們舉辦的 Raspberry Pi Jam in Taipei 2020 會在台北一同響應，活動將在 3/14 邀請各地的朋友分享有趣的專案，也會邀請之前的講者一起來聊聊天，並且發放 Raspberry Pi Jam 小禮物。
這次活動的內容包括有︰
1. 披薩和可樂 ==> 對的，這是慶生會必要的餐點!
2. 閃電秀分享。
閃電秀持續更新中…
===
1. Peter Lai(Diode)。
> How to use Pi (Pi Zero W) to stream video through diodechain network。
* How to stream video from Pi
* Introduction of diodechain network
* Demo streaming video through diodechain network
Raspberry Pi Foundation is coordinating Raspberry Jam events to take place around the world during 2/15 to 3/15, so that as many people as possible can join in. We will host the Raspberry Pi Jam in Taipei 2020, the detail are shown belows:
1. PIZZA and COKE
2. New Raspberry Pi Projects
lightning talk…
===
1. Peter Lai(Diode)。
> How to use Pi (Pi Zero W) to stream video through diodechain network。
* How to stream video from Pi
* Introduction of diodechain network
* Demo streaming video through diodechain network
2. Daniel Chen(Winyam.Maker)
> 「DalaTone」– Use Raspberry Pi to turn your phone into a guide / intercom
* Overview of the functions and applications of traditional radio guides
*「Introduction of 「DalaTone」(Raspberry Pi as host server. Software and hardware architecture of the「DalaTone」. Functions and features of the「DalaTone」)
* DEMO
3. Ledger
> Raspberry Pi Power Management
* Introduction to Raspberry Pi power management
* Raspberry Pi PMIC(Power Management IC)
* The problem of Pi 3B+
* The change of Pi 4
4. 彭聖智、周詠健(NTUST BEST Lab)
> Self-driving in Raspberry Pi上 – Duckietown
* Introduction to Duckietown
* Introduction to Self-driving System Course
* The 1st Self-Driving System Competition
5. 黃尹謙、梁舜勛(台大機械賽車隊-圓夢方程式)
> NTU epsilon Racing Car: From Zero to One
* Racing car data collection
* Real-time pose estimation
* Automotive real time data analytics
* Sensor fusion
6. Philipz(Docker.Taipei Orgranizer)
> Introduction to Docker Buildx
===
Additional Information:
2020/03/14 13:00 ~ 2020/03/14 17:00
2F., No.105, Sec. 1, Chongqing S. Rd., Zhongzheng Dist., Taipei City
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
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
The Raspberry Pi PoE HAT powers a Raspberry Pi 3 Model B+ via an Ethernet cable. Power-sourcing equipment is required on the Ethernet network.
《特色》
The Raspberry Pi Power over Ethernet HAT is a small accessory for the Raspberry Pi computer. It can only be used with the Raspberry Pi 3 Model B+ (launched March 2018). The PoE HAT allows you to power your Raspberry Pi using Power over Ethernet–enabled networks; for this product to be used, the network it is connected to needs to have power-sourcing equipment installed.
Power-sourcing equipment for a 802.3af Power over Ethernet network
Connecting your PoE HAT to the Raspberry Pi
Before installing the PoE HAT, you must attach the supplied spacers in the four corners of the board
Then connect the Raspberry Pi PoE HAT to the two 0.1” headers (40 + 4) that are fitted on the Raspberry Pi
Once the PoE HAT board is connected, you can power the Raspberry Pi through its RJ45 network connector
Disconnecting your PoE HAT
Take care when separating the HAT from the Pi
Pull evenly so that it detaches from all the pins at the same rate; do not pull one end of the connector off before the other
Additional information
No modification to the main Raspberry Pi board is needed for this product to work. Please ensure that your Raspberry Pi’s software is up to date for all functionality to be available. The PoE HAT is fitted with a small fan that is controlled by the Raspberry Pi via I2C. The fan will turn on and off automatically depending on the temperature of the main processor on the Raspberry Pi.
《規格》
The Raspberry Pi PoE HAT is an add-on board for the Raspberry Pi 3 Model B+. It allows the Raspberry Pi to be powered via a power-enabled Ethernet network.
Shall only be powered using 802.3af-compliant power sourcing equipment; any external power supply used with the Raspberry Pi shall comply with relevant regulations and standards applicable in the country of intended use
Should be operated in a well-ventilated environment, and should not be covered
Should be placed on a stable, flat, non-conductive surface while in use, and should not be contacted by conductive items
Instructions for safe use
To avoid malfunction or damage to your Raspberry Pi product, please observe the following advice:
Do not block or obstruct the fan
Do not insert anything into the fan at any time
Do not expose the product to water or moisture, and do not place it on a conductive surface whilst it is in operation
Do not expose it to heat from any source; the product is designed for reliable operation at normal room temperatures
Take care whilst handling to avoid mechanical or electrical damage to the printed circuit board and connectors
Avoid handling the Raspberry Pi while it is connected to a power outlet; only handle by the edges to minimize the risk of electrostatic discharge damage
All other peripherals used with the Raspberry Pi should comply with relevant standards for the country of use and be marked accordingly to ensure that safety and performance requirements are met; these peripherals include, but are not limited to, keyboards, monitors, and mice used in conjunction with the Raspberry Pi
* 注意：本商品不包含 Raspberry Pi 3 Model B+。 $ 840 (單買 PoE HAT)
Pi 3B+ 這次新增了 MaxLinear MxL7704 電源管理 IC，可有更好的溫度管理策略。例如在 70°C 以下可以使用 1.4GHz 全速運轉；但超過了 70°C 就會降到 1.2GHz 的速度。可用 Sysbench 看溫度/頻率的曲線圖。
圖片來源：RASPBERRY PI 3 MODEL B+ ON SALE NOW AT $35
2018-03-13:
* Raspberry Pi 3 B+ support
* WiFi is disabled until wireless regulatory domain is set (Pi 3 B+ only)
- The domain can be done through 'Raspberry Pi Configuration' (rc_gui),
'raspi-config' or by setting 'country=' to an appropriate ISO 3166
alpha2 country code in /etc/wpa_supplicant/wpa_supplicant.conf.
* Default wireless regulatory domain is now unset
* Added support to desktop for different screen sizes and resolutions,
including multiple preset options in Appearance Settings and pixel doubling
option in Raspberry Pi Configuration
* Version 2.1.16 of Thonny included
* Version 29.0.0.113 of Adobe PepperFlash player included
* Version 1.2.post1 of Pygame Zero included
* Bluetooth plugin now supports connection to Bluetooth LE HID devices
* Network plugin now indicates 5G-compatible APs
* Latest changes to Bluez ALSA service merged
- service now started on CLI boot as well as GUI boot
* Latest changes to dhcpcd networking plugin merged
* Improved support for running on pi-top devices
* Small design changes to PiX theme and icons
* Bug fix - hide spurious window resize handles
* Bug fix - Scratch 2 remote GPIO state block now works correctly
* Updated WiFi Firmware
- brcmfmac43455-sdio 7.45.154
- brcmfmac43430-sdio 7.45.98.38
* New packages:
- policykit-1
- obconf
- python-buttonshim python3-buttonshim
- python-unicornhathd python3-unicornhathd
- python-pantilthat python3-pantilthat
* Linux kernel 4.9.80+
* Raspberry Pi firmware 3347884c7df574bbabeff6dca63caf686e629699
《規格》
– 45 X 31 X 75mm (不含線長及插頭長)
– 線長：約 1.5M
– 插頭類型：microUSB
– 含四種萬國轉接頭(EU、UK、US、AUS)
– Input：110V-220V AC
– Output：5.1V DC up to 2.5 A
– 輸出功率：13W
– 顏色：黑色 / 白色兩款可選
