Logger

Singleton logging system with color output, ASCII art, and per-tag filtering.

Access 

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auto& logger = Logger::GetInstance();
logger.Initialize();  // Optional config: Logger::GetInstance().Initialize(config);

Log Methods 

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logger.Error("MyTag", "Error: code %d", err);
logger.Warn("MyTag", "Warning: value %.2f", val);
logger.Info("MyTag", "Info: initialized");
logger.Debug("MyTag", "Debug: state=%d", state);
logger.Verbose("MyTag", "Verbose: raw=0x%04X", raw);

Formatted Output 

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logger.Info("Tag", LogColor::GREEN, LogStyle::BOLD,
            "Bold green: %d", value);

ASCII Art 

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logger.LogBanner("Tag", R"(
  _   _ _____ _____ _____ 
 | | | |  ___|  _  |  _  |
 | |_| | |__ | | | | |_| |
)");

Per-Tag Filtering 

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logger.SetLogLevel("NoisyModule", LogLevel::WARN);  // Only WARN+ for this tag

Convenience Macros 

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LOG_ERROR("tag", "message %d", val);
LOG_WARN("tag", "message");
LOG_INFO("tag", "message");
LOG_DEBUG("tag", "message");
LOG_VERBOSE("tag", "message");

Thread Safety

The Logger is thread-safe and can be called from any RTOS task or ISR context (for short messages).

Test Coverage

See examples/esp32/main/utils_tests/logger_comprehensive_test.cpp.