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Arduino101 加速度传感器 · App Inventor 2 中文网
...1个地球重力(G=-9.8 m/s2)的倍数表示。
参数:
+ Accelerometer_X (_number_) — 加速度传感器的X值，单位为G。
+ Accelerometer_Y (_number_) — 加速度传感器的Y值，单位为G。
+ Accelerometer_Z (_number_) — 加速度传感器的Z值，单位为G。
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Arduino101 伺服 · App Inventor 2 中文网
...服电机的旋转角度。有效值为0-180度。
参数:
* position (_number_) —
伺服电机的新位置(角度)。有效值为0-180度。
SetPositionMicros – 设置连续旋转型伺服电机每转所需时间(微秒)。对于标准
伺服电机，1000表示完全逆时针...
Microbit 串行端口 (UART) 接口 · App Inventor 2 中文网
...页
Microbit 串行端口 (UART) 接口
Microbit_Uart 传感器提供从 BBC micro:bit 的串行 UART 端口读取和写入字符串的功能。
属性
BluetoothDevice – 设置连接到 micro:bit 设备的 BluetoothLE 组件。
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Microbit Uart Simple · App Inventor 2 中文网
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Microbit Uart Simple
Microbit_Uart_Simple 传感器提供从 BBC micro:bit 的串行 UART 端口读取和写入字符串的功能。
属性
BluetoothDevice – 设置连接到 micro:bit 设备的 BluetoothLE 组件。
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std::unique_lock or std::lock_guard?
...
The difference is that you can lock and unlock a std::unique_lock. std::lock_guard will be locked only once on construction and unlocked on destruction.
So for use case B you definitely need a std::unique_lock for the condition variable. In case A it depends whether you need to relo...
Get the data received in a Flask request
...The request must have the application/json content type, or use request.get_json(force=True) to ignore the content type.
All of these are MultiDict instances (except for json). You can access values using:
request.form['name']: use indexing if you know the key exists
request.form.get('name'): us...
Size of Matrix OpenCV
... Link to documentation: docs.opencv.org/modules/core/doc/basic_structures.html#mat-size
– Rasim
Dec 25 '12 at 6:50
1
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How to determine SSL cert expiration date from a PEM encoded certificate?
... "$pem"
done | sort
Sample output:
2015-12-16: /etc/ssl/certs/Staat_der_Nederlanden_Root_CA.pem
2016-03-22: /etc/ssl/certs/CA_Disig.pem
2016-08-14: /etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_S.pem
share
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what is the unsigned datatype?
...or unsigned long long int
— float
— double
— long double
— _Bool
— float _Complex
— double _Complex
— long double _Complex
— atomic type specifier
— struct or union specifier
— enum specifier
— typedef name
So in case of unsigned int we can either writ...
Conditional import of modules in Python
...ad of relying on the user; here's pySerial doing it as an example.
serial/__init__.py
import sys
if sys.platform == 'cli':
from serial.serialcli import Serial
else:
import os
# chose an implementation, depending on os
if os.name == 'nt': # sys.platform == 'win32':
from se...