在arduino1.0之前的版本 Serial.flush()的作用是是清空串口缓存( dropping received incoming data).但在1.0之后的版本 Serial.flush()的作用调整为了等待串口数据传送完毕(Waits for the transmission of outgoing serial data to complete.)(引用自http://arduino.cc/en/Serial/Flush). 因为我在使用wifibee的过程中,如果既想用Ser…
查看Linux ARP缓存老化时间 cat /proc/sys/net/ipv4/neigh/eth0/base_reachable_time同目录下还有一个文件gc_stale_time,官方解释如下:Determines how often to check for stale neighbour entries. When a neighbour entry is considered stale it is resolved again before sending data to it…