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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
...
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:
...
How to go from Blob to ArrayBuffer
...rayBuffer(blob);
Here's a longer example:
// ArrayBuffer -> Blob
var uint8Array = new Uint8Array([1, 2, 3]);
var arrayBuffer = uint8Array.buffer;
var blob = new Blob([arrayBuffer]);
// Blob -> ArrayBuffer
var uint8ArrayNew = null;
var arrayBufferNew = null;
var fileReader = ne...
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，...
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
...
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 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...
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...
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...