19 lines
1.2 KiB
Markdown
19 lines
1.2 KiB
Markdown
# Message Logging
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### *LOG1(X)* and *LOG2(X)*
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### *LOG1(const char \*fmt, ...)* and *LOG2(const char \*fmt, ...)*
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Displays user-defined log messages on the Arduino Serial Monitor according to the log level specified with `setLogLevel()`, or as specified at runtime with the 'L' command via the [HomeSpan CLI](CLI.md). `LOG1()` messages will be output only if the log level is set to 1 or greater. `LOG2()` messages will be output only if the log level is set to 2.
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* In the first form (e.g. `LOG1(X)`), the macro calls `Serial.print(X)`. The argument *X* can be any variable recognized by the Arduino `Serial.print()` function. For example, `int val=255; LOG1(val);` outputs "255" to the Serial Monitor
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* In the second form (e.g. `LOG1(const char *fmt, ...)`), the macro calls `Serial.printf(fmt, ...)` enabling you to create printf-style formatted output. For example, `int val=255; LOG1("The value is: %X",val);` outputs the "The value is: FF" to the Serial Monitor
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* See [Example 9 - MessageLogging](https://github.com/HomeSpan/HomeSpan/blob/master/docs/Tutorials.md#example-9---messagelogging) for a tutorial sketch demonstrating these functions
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### WEBLOG(const char *fmt, ...)
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---
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[↩️](README.md) Back to the Welcome page
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