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[SOLVED] Can't send payload > 23bytes(MTU setted to 128bytes) - #9 by ...
...P32 firmware I wrote:
BLEDevice::init("Monitor3");
BLEDevice::setMTU(128);
uint16_t MTUU = BLEDevice::getMTU();
Serial.print("MTU --> ");
Serial.println(MTUU);
I am using the latest BLE extension and my cellphone has BLE V5.0
PLease how can I proceed at app side?
Thanks in advance
...
菜单的背景颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...s//设置菜单项左边的位图
函数定义：BOOL SetMenuItemBitmaps( UINT nPosition, UINT nFlags, const CBitmap* pBmpUnchecked, const CBitmap* pBmpChecked );
nPostion指明具体要设置的菜单项，可以是菜单项索引，菜单项ID，具体由nFlags参数指明，为MF_BYPOSITION，...
Accessing inactive union member and undefined behavior?
...were hinting at the same question as me: what if our union contains e.g. a uint8_t and a class Something { uint8_t myByte; [...] }; - I would assume this proviso would also apply here, but it's worded very deliberately to only allow for structs. Luckily I'm already using those instead of raw primiti...
How to make an OpenGL rendering context with transparent background?
...turn FALSE;
}
return TRUE;
}
LRESULT CALLBACK WindowFunc(HWND hWnd,UINT msg, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
switch(msg)
{
case WM_ERASEBKGND:
return 0;
break;
case WM_CREATE:
break;
case WM_DESTROY:
...
What's the best way to do a backwards loop in C/C#/C++?
...
You can declare i as uint.See Marc Gravell's post.
– Jack Griffin
Nov 10 '19 at 16:57
...
How can I display an image from a file in Jupyter Notebook?
...IPython.display
import numpy as np
def showarray(a, fmt='png'):
a = np.uint8(a)
f = StringIO()
PIL.Image.fromarray(a).save(f, fmt)
IPython.display.display(IPython.display.Image(data=f.getvalue()))
share
...
Programmatically retrieve memory usage on iPhone
... func formattedMemoryFootprint() -> String
{
let usedBytes: UInt64? = UInt64(self.memoryFootprint() ?? 0)
let usedMB = Double(usedBytes ?? 0) / 1024 / 1024
let usedMBAsString: String = "\(usedMB)MB"
return usedMBAsString
}
}
Enjoy!
Note: an enterprising...
MFC SetCursor设置手型鼠标光标 - C/C++ - 清泛网 - 专注C/C++及内核技术
...设置手型鼠标光标，部分代码如下：void CxxxDlg::OnMouseMove(UINT nFlags, CPoint point){__super::OnMouseMove(nFlags, point);int...设置手型鼠标光标，部分代码如下：
void CxxxDlg::OnMouseMove(UINT nFlags, CPoint point)
{
__super::OnMouseMove(nFlags, point);
int nI...
C/C++ NaN constant (literal)?
...char-sequence)",0) counterparts and NAN for assignments.
// Sample C code
uint64_t u64;
double x;
x = nan("0x12345");
memcpy(&u64, &x, sizeof u64); printf("(%" PRIx64 ")\n", u64);
x = -strtod("NAN(6789A)",0);
memcpy(&u64, &x, sizeof u64); printf("(%" PRIx64 ")\n", u64);
x = NAN;
mem...
SHFileOperation函数总结（文件夹的移动、复制、删除） - C/C++ - 清泛网 -...
...OPSTRUCT
{
HWND hwnd; //父窗口句柄
UINT wFunc; //要执行的动作
LPCTSTR pFrom; //源文件路径，可以是多个文件
LPCTSTR pTo; //目标路径，可以是路径或文件名
FILEOP_FLAGS...