Boox Drop's API
I investigated HTTP APIs used by Boox Drop to manage files in Boox e-paper devices.
No guarantee!!
Directory Listing
curl -G http://BOOX_IP_ADDRESS:8085/api/storage \
--data-urlencode 'args={"dir":"/storage/emulated/0/Books"}'
-G forces GET, not POST, even with --data-urlencode.
This returns a list in JSON, which looks like (tidied by jq):
{ { "dir": false, "name": "Test1.pdf", "path": "/storage/emulated/0/Books/Test1.pdf", "size": 358469, "updatedAt": 1689988630000 }, ... }
Directory Creation
curl http://BOOX_IP_ADDRESS:8085/api/storage/directory \
-H 'Content-Type: application/json;charset=UTF-8' \
--data-raw '{"parent":"/storage/emulated/0/Books","name":"FolderTest"}'
Upload to Boox
This uses multipart form post.
curl http://BOOX_IP_ADDRESS:8085/api/storage/upload \ -F dir=/storage/emulated/0/Books/FolderTest \ -F file=@/path-to/TESTFILE
Download from Boox
curl -G http://BOOX_IP_ADDRESS:8085/api/storage/file \ --data-urlencode 'args=/storage/emulated/0/Books/FolderTest/TESTFILE'
Using this on a directory returns rubbish.
Deletion
curl -X DELETE -G http://BOOX_IP_ADDRESS:8085/api/storage/delete \ --data-urlencode 'args=/storage/emulated/0/Books/FolderTest/TESTFILE'
This can also delete a folder, even when it contains files within!
curl -X DELETE -G http://BOOX_IP_ADDRESS:8085/api/storage/delete \ --data-urlencode 'args=/storage/emulated/0/Books/FolderTest'
The Web interface uses api/storage/directory/delete, though. Apparently that allows deleting multiple files in one go.
USB デバイスの電源を切る
"Power management for USB" によると、/sys/bus/usb/devices/XXX/power/control を auto にしておくと idle 状態になって /sys/bus/usb/devices/XXX/power/autosuspend_delay_ms ミリ秒後に自動的にオフになり、要求があればまた起きるらしい。HDD のようなデバイスの場合 idle 状態がどう定義されるのか、マウントされていない状態のことか、それともアクセスがない状態のことか、未確認。
i7z
i7z という CPU 周波数をリアルタイムで表示するツールを知った。
13th Gen Intel Core i9-13900H の無負荷時でファンが停止してる時:
Socket [0] - [physical cores=14, logical cores=20, max online cores ever=14]
TURBO ENABLED on 14 Cores, Hyper Threading ON
Max Frequency without considering Turbo 3094.83 MHz (99.83 x [31])
Max TURBO Multiplier (if Enabled) with 1/2/3/4/5/6 Cores is 54x/54x/51x/51x/49x/49x
Real Current Frequency 887.60 MHz [99.83 x 8.89] (Max of below)
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 % Temp VCore
Core 1 [0]: 638.14 (6.39x) 1 84.2 0 15.6 37 0.6820
Core 2 [2]: 806.91 (8.08x) 1 92.8 0 7.07 36 0.6720
Core 3 [4]: 885.43 (8.87x) 5.4 94.4 0 3.99 40 0.6725
Core 4 [6]: 887.60 (8.89x) 5.05 85.2 0 13.3 35 0.6775
Core 5 [8]: 828.24 (8.30x) 4.65 86.6 0 12.1 36 0.6775
Core 6 [10]: 759.88 (7.61x) 3.35 94.8 0 4.4 35 0.6925
Core 7 [12]: 731.32 (7.33x) 1 0.55 0 99.3 39 0.6775
Core 8 [13]: 844.35 (8.46x) 1 0.238 0 99.7 39 0.6775
Core 9 [14]: 830.58 (8.32x) 1 1.19 0 98.8 39 0.6775
Core 10 [15]: 764.18 (7.65x) 1 0.341 0 99.6 39 0.6775
Core 11 [16]: 801.95 (8.03x) 1 2.19 0 97.8 40 0.6765
Core 12 [17]: 783.89 (7.85x) 1 0.625 0 99.4 40 0.6715
Core 13 [18]: 819.86 (8.21x) 1 1.13 0 98.8 41 0.6715
Core 14 [19]: 782.10 (7.83x) 1 1.73 0 98.2 41 0.6715
CPU 温度 (sensors による):
coretemp-isa-0000 Adapter: ISA adapter Package id 0: +44.0°C (high = +100.0°C, crit = +100.0°C) Core 0: +38.0°C (high = +100.0°C, crit = +100.0°C) Core 4: +37.0°C (high = +100.0°C, crit = +100.0°C) Core 8: +41.0°C (high = +100.0°C, crit = +100.0°C) Core 12: +36.0°C (high = +100.0°C, crit = +100.0°C) Core 16: +37.0°C (high = +100.0°C, crit = +100.0°C) Core 20: +35.0°C (high = +100.0°C, crit = +100.0°C) Core 24: +40.0°C (high = +100.0°C, crit = +100.0°C) Core 25: +40.0°C (high = +100.0°C, crit = +100.0°C) Core 26: +40.0°C (high = +100.0°C, crit = +100.0°C) Core 27: +40.0°C (high = +100.0°C, crit = +100.0°C) Core 28: +41.0°C (high = +100.0°C, crit = +100.0°C) Core 29: +41.0°C (high = +100.0°C, crit = +100.0°C) Core 30: +41.0°C (high = +100.0°C, crit = +100.0°C) Core 31: +41.0°C (high = +100.0°C, crit = +100.0°C)
一方、10 年前のラップトップ(Intel Core i7-3537U) だと、こちらも無負荷時で(ファンは /proc/acpi/ibm/fan 上は停止しているように見えるが、かすかに音がしているし、負荷をかけて明らかに回っているときでも 0 なので信用できない):
Socket [0] - [physical cores=2, logical cores=4, max online cores ever=2]
TURBO ENABLED on 2 Cores, Hyper Threading ON
Max Frequency without considering Turbo 2593.76 MHz (99.76 x [26])
Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is 31x/29x/29x/29x
Real Current Frequency 810.57 MHz [99.76 x 8.13] (Max of below)
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 % C7 % Temp VCore
Core 1 [0]: 798.09 (8.00x) 1 1.41 0 0 98.4 41 0.8105
Core 2 [2]: 810.57 (8.13x) 1 1.37 0 0 98.5 41 0.8156
温度:
coretemp-isa-0000 Adapter: ISA adapter Package id 0: +46.0°C (high = +87.0°C, crit = +105.0°C) Core 0: +46.0°C (high = +87.0°C, crit = +105.0°C) Core 1: +44.0°C (high = +87.0°C, crit = +105.0°C)
古いマシンのほうが温度が高い! Vcore が高いせいだろうか。もちろん、フォームファクタも違うので単純な比較はできないが。
