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Service and Characteristic are not published by the connected device -...
Service and Characteristic are not published by the connected device，报错如下：
问题原因：硬件/蓝牙芯片问题导致的，比如A硬件测试好的，换了B硬件没有修改uuid，就出现这个报错。
由于B硬件没有发布这些特征，就会报这个错误。
AppInventor写二进制文件 - App应用开发 - 清泛IT社区，为创新赋能！
...二进制文件：https://www.fun123.cn/reference/iot/bytearray.html
蓝牙等组件返回的字节列表（list），目前不能直接追加到拓展中，可以采用遍历字节列表，然后将字节逐一将追加到拓展中，最后调用拓展方法保存为二进制文件。
2026 新年第一篇：即将全面支持苹果iOS App编译生成，纯血鸿蒙计划中，编译...
...身不可用，iOS 支持很多常用功能作为内置 Blocks／组件：蓝牙支持（Bluetooth）NFC（Near Field Communication）物联网扩展（例如 micro:bit）AI 扩展基础支持（如 PersonalImageClassifier 等）
这些是在 iOS 原生支持层面集成的，而非通过插件机...
Finding the index of an item in a list
...ure should be used if the list is very long?
– izhang05
Feb 22 at 20:36
@izhang: Some auxillary index, like an {elemen...
Real life example, when to use OUTER / CROSS APPLY in SQL
... reference the outer table, where INNER JOIN cannot do this(throws compile error). When finding the last two dates, joining is done inside CROSS APPLY ie, WHERE M.ID=D.ID.
2. When we need INNER JOIN functionality using functions.
CROSS APPLY can be used as a replacement with INNER JOIN when we ne...
Determining 32 vs 64 bit in C++
...
#if _WIN32 || _WIN64 … #elif __GNUC__ … #else # error "Missing feature-test macro for 32/64-bit on this compiler."?
– Davislor
Nov 29 '15 at 20:24
...
What does “abstract over” mean?
... The code runs on REPL fine. What version of Scala are you using, and what error did you get?
– Daniel C. Sobral
Jan 22 '11 at 22:47
1
...
Should you always favor xrange() over range()?
...cent call last):
File "<stdin>", line 1, in <module>
OverflowError: Python int too large to convert to C long
Python 3 does not have this problem:
Python 3.2.3 (default, Jul 14 2012, 01:01:48)
[GCC 4.7.1] on linux2
Type "help", "copyright", "credits" or "license" for more informati...
Undefined reference to `pow' and `floor'
...ts symbols from object file. You can see that this was compiled without an error, but pow, floor, and printf functions have undefined references, now if I will try to link this to executable:
$ gcc fib.o
fib.o: In function `fibo':
fib.c:(.text+0x57): undefined reference to `pow'
fib.c:(.text+0x84):...
How to list the contents of a package using YUM?
...ticheleThomas Vander Stichele
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