I have my Arduino on /dev/ttyATH0. Arduino permanently sends data like "255" with a newline. How to read the last line from Arduino? I tried using tail -1 /dev/ttyATH0 but I should press I have my Arduino on /dev/ttyATH0. Arduino perm
阅读背景：
使用shell脚本在OpenWrt中读取最后一行序列
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