从RS-232端口读取字符串的最简单方法？

I have a custom made board which reads different metrics from various sensors (e.g. temperature in Celcius, pressure in bars) and sends them by a RS-232 port as a string with a "channel" (a mnemonic of the sensor) and the actual reading e.g. "a14.23" or "b33.0".I have a custom made board which reads differen