diff --git a/firmware/development/engine_sniffer.cpp b/firmware/development/engine_sniffer.cpp
index f46d5d1d0d..a0b1cc3ee1 100644
--- a/firmware/development/engine_sniffer.cpp
+++ b/firmware/development/engine_sniffer.cpp
@@ -141,7 +141,7 @@ WaveChart::WaveChart() {
 }
 
 void WaveChart::init() {
-	initLoggingExt(&logging, "wave chart", WAVE_LOGGING_BUFFER, sizeof(WAVE_LOGGING_BUFFER));
+	logging.initLoggingExt("wave chart", WAVE_LOGGING_BUFFER, sizeof(WAVE_LOGGING_BUFFER));
 	isInitialized = true;
 	reset();
 }
diff --git a/firmware/util/datalogging.cpp b/firmware/util/datalogging.cpp
index 2123c7bdcd..dce9361588 100644
--- a/firmware/util/datalogging.cpp
+++ b/firmware/util/datalogging.cpp
@@ -115,6 +115,7 @@ static void vappendPrintf(Logging *logging, const char *fmt, va_list arg) {
 	}
 }
 
+// todo: replace with logging->appendPrintf
 void appendPrintf(Logging *logging, const char *fmt, ...) {
 	efiAssertVoid(CUSTOM_ERR_6607, getRemainingStack(chThdGetSelfX()) > 128, "lowstck#4");
 	va_list ap;
@@ -123,12 +124,20 @@ void appendPrintf(Logging *logging, const char *fmt, ...) {
 	va_end(ap);
 }
 
-void initLoggingExt(Logging *logging, const char *name, char *buffer, int bufferSize) {
-	logging->name = name;
-	logging->buffer = buffer;
-	logging->bufferSize = bufferSize;
-	resetLogging(logging);
-	logging->isInitialized = true;
+void Logging::appendPrintf(const char *fmt, ...) {
+	efiAssertVoid(CUSTOM_ERR_6607, getRemainingStack(chThdGetSelfX()) > 128, "lowstck#4");
+	va_list ap;
+	va_start(ap, fmt);
+	vappendPrintf(this, fmt, ap);
+	va_end(ap);
+}
+
+void Logging::initLoggingExt(const char *name, char *buffer, int bufferSize) {
+	this->name = name;
+	this->buffer = buffer;
+	this->bufferSize = bufferSize;
+	resetLogging(this);
+	this->isInitialized = true;
 }
 
 int isInitialized(Logging *logging) {
@@ -303,7 +312,7 @@ Logging::Logging() {
 Logging::Logging(char const *name, char *buffer, int bufferSize) {
 	baseConstructor();
 #if ! EFI_UNIT_TEST
-	initLoggingExt(this, name, buffer, bufferSize);
+	initLoggingExt(name, buffer, bufferSize);
 #endif /* ! EFI_UNIT_TEST */
 }
 
diff --git a/firmware/util/datalogging.h b/firmware/util/datalogging.h
index 29113d045f..d569ebfc39 100644
--- a/firmware/util/datalogging.h
+++ b/firmware/util/datalogging.h
@@ -21,6 +21,10 @@ public:
 	void baseConstructor();
 	Logging();
 	Logging(const char *name, char *buffer, int bufferSize);
+	void initLoggingExt(const char *name, char *buffer, int bufferSize);
+	void append(const char *text);
+	void appendFast(const char *text);
+	void appendPrintf(const char *fmt, ...);
 	const char *name;
 	char SMALL_BUFFER[40];
 	/**