diff --git a/firmware/application/apps/ui_debug.cpp b/firmware/application/apps/ui_debug.cpp
index 8622911c..2bec78fa 100644
--- a/firmware/application/apps/ui_debug.cpp
+++ b/firmware/application/apps/ui_debug.cpp
@@ -121,7 +121,8 @@ void TemperatureWidget::paint(Painter& painter) {
 }
 
 TemperatureWidget::temperature_t TemperatureWidget::temperature(const sample_t sensor_value) const {
-	return -35 + sensor_value * 4;  //max2837 datasheet temp 25ºC has sensor value: 15
+	/*It seems to be a temperature difference of 25C*/
+	return -40 +(sensor_value * 4.31)+25;  //max2837 datasheet temp 25ºC has sensor value: 15
 }
 
 std::string TemperatureWidget::temperature_str(const temperature_t temperature) const {
diff --git a/firmware/application/portapack.cpp b/firmware/application/portapack.cpp
index 99843aec..44fc1db7 100644
--- a/firmware/application/portapack.cpp
+++ b/firmware/application/portapack.cpp
@@ -179,20 +179,23 @@ static PortaPackModel portapack_model() {
 	static Optional<PortaPackModel> model;
 
 	if( !model.is_valid() ) {
-		if( audio_codec_wm8731.detected() ) {
-			model = PortaPackModel::R1_20150901;
-		} else {
+		/*For the time being, it is impossible to distinguish the hardware of R1 and R2 from the software level*/
+		/*At this point, I2c is not ready.*/
+		//if( audio_codec_wm8731.detected() ) {
+		//	model = PortaPackModel::R1_20150901;
+		//} else {
 			model = PortaPackModel::R2_20170522;
-		}
+		//}
 	}
 
 	return model.value();
 }
 
 static audio::Codec* portapack_audio_codec() {
-	return (portapack_model() == PortaPackModel::R2_20170522)
-		? static_cast<audio::Codec*>(&audio_codec_ak4951)
-		: static_cast<audio::Codec*>(&audio_codec_wm8731)
+	/* I2C ready OK, Automatic recognition of audio chip */
+	return (audio_codec_wm8731.detected())
+		? static_cast<audio::Codec*>(&audio_codec_wm8731)
+		: static_cast<audio::Codec*>(&audio_codec_ak4951)
 		;
 }