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在APP Inventor的BLE组件使用RequestMTU方法之后，发送的字符数依旧限制在2...
...连接上蓝牙，也能传输数据，但是发送和接受的数据都是20字节的分包。使用BLE调试宝，在里面修改MTU，返回的值是512，并且是修改成功的，但是在编程中使用RequestMTU方式设置512,，并且读取返回值也是512，然后调用方法WriteString...
2025年3月20日签到记录贴 - 签到区 - 清泛IT社区，为创新赋能！
...动生成的,如果您还未签到,请点此进行签到的操作. 我在 2025-03-20 06:39 完成签到,是今天第一个签到的用户,获得随机奖励 小红花 4,另外我还额外获得了 小红花 10.我今天最想说:「该会员没有填写今日想说内容.」. 我在 2025-03-20 08:30...
Serializing class instance to JSON
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answered Apr 20 '12 at 19:09
stevehasteveha
64.4k1616 gold badges8181 silver badges109109 bronze badges
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Add legend to ggplot2 line plot
... I would plot your data:
##Subset the necessary columns
dd_sub = datos[,c(20, 2,3,5)]
##Then rearrange your data frame
library(reshape2)
dd = melt(dd_sub, id=c("fecha"))
All that's left is a simple ggplot command:
ggplot(dd) + geom_line(aes(x=fecha, y=value, colour=variable)) +
scale_colour_ma...
Changing the current working directory in Java?
...se JNI native code as suggested below.
The relevant Sun bug was closed in 2008 as "will not fix".
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How to do exponentiation in clojure?
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edited Feb 20 '11 at 17:42
answered Feb 20 '11 at 17:07
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How to get the start time of a long-running Linux process?
... STARTED
1 Tue Jun 7 01:29:38 2016 /sbin/init
2 Tue Jun 7 01:29:38 2016 [kthreadd]
3 Tue Jun 7 01:29:38 2016 [ksoftirqd/0]
5 Tue Jun 7 01:29:38 2016 [kworker/0:0H]
7 Tue J...
How to delete last character in a string in C#?
...of the string.
– Ammar
Oct 1 '12 at 20:49
I knew this was in Ruby, had no idea it was in C# and I'm a .net dev. I feel...
Infinity symbol with HTML
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answered Feb 12 '10 at 20:30
ЯegDwightЯegDwight
23k99 gold badges4040 silver badges5151 bronze badges
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Django-Admin: CharField as TextArea
...er below.
– Carl Meyer
Dec 2 '13 at 20:25
1
This gives django.core.exceptions.ImproperlyConfigure...