如何在Arduino中将char变量作为数字打印到串行端口? [英] How to print in Arduino a char variable as a number to the Serial Port?

问题描述

我正在使用Arduino Uno.我正在从EEPROM读取一个字节值，并将该值存储在char类型(1个字节)的变量中.

I am using Arduino Uno. I am reading a byte value from the EEPROM and storing the value in a variable of type char (1 byte).

我想将变量的值打印为数字(而不是打印到相应的ASCII码)到串行监视器.例如，考虑char val = 5. 我想查看串行监视器5而不是ASCII值.

I want to print the value of the variable as a number (not to the corresponding ASCII code) to the Serial Monitor. For example consider char val = 5. I want to see to the Serial Monitor 5 and not the ASCII value.

我同时尝试了Serial.print(val)和Serial.write(val)，但结果是相同的:它始终打印ASCII码.

I tried both Serial.print(val) and Serial.write(val) but the result is the same: it prints always the ASCII code.

如何将值打印到串行监视器?

How can I print the value to the Serial Monitor?

谢谢.

推荐答案

将char变量转换为unsigned char类型:

Serial.print( (uint8_t) c );

这调用了不同的print方法.它们超载".

This calls a different print method. They are "overloaded".

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