diff --git a/README.md b/README.md
index 0f79f6ce..b90c8f72 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 # Xiaomi Mijia LYWSD03MMC HW: [B1.4](https://github.com/pvvx/ATC_MiThermometer/tree/master/BoardPinout), [B1.6](https://github.com/pvvx/ATC_MiThermometer/issues/125), [B1.7](https://github.com/pvvx/ATC_MiThermometer/issues/145), [B1.9](https://github.com/pvvx/ATC_MiThermometer/issues/125), [B2.0](https://github.com/pvvx/ATC_MiThermometer/issues/166) & Xiaomi Miaomiaoce [MHO-C401](https://pvvx.github.io/MHO_C401) & [CGG1](https://pvvx.github.io/CGG1) Mijia Bluetooth Thermometer Firmware & [CGDK2](https://pvvx.github.io/CGDK2) Qingping Temp & RH Monitor Lite
 
-This repository contains custom firmware for several Bluetooth Thermometer & Hygrometer devices.
+_This repository contains custom firmware for several Bluetooth Thermometer & Hygrometer devices.
 The download of the appropriate firmware for your device will be presented automatically in [TelinkMiFlasher.html](https://pvvx.github.io/ATC_MiThermometer/TelinkMiFlasher.html). Downloading files from this repository is not required.
-Alternative firmware and configurator from ATC1441 (variant ATC_Thermometer.bin) can be found here: [atc1441/ATC_MiThermometer](https://github.com/atc1441/ATC_MiThermometer).
+Alternative firmware and configurator from ATC1441 (variant ATC_Thermometer.bin) can be found here: [atc1441/ATC_MiThermometer](https://github.com/atc1441/ATC_MiThermometer)._
 
 The custom firmware can be flashed _via a modern browser_ and _over-the-air (OTA)_ without opening the device and unlocks several customization options. You can go back to the original firmware at any time. OTA and configuration main page - [TelinkMiFlasher.html](https://pvvx.github.io/ATC_MiThermometer/TelinkMiFlasher.html).
 
diff --git a/makefile b/makefile
index e7cc1d90..f5aa32dc 100644
--- a/makefile
+++ b/makefile
@@ -65,6 +65,7 @@ LS_FLAGS := $(PROJECT_PATH)/boot.link
 #-include $(PROJECT_PATH)/make/common.mk
 #-include $(PROJECT_PATH)/make/vendor_common.mk
 #-include $(PROJECT_PATH)/make/tinyFlash.mk
+-include $(PROJECT_PATH)/uprintf.mk
 -include $(PROJECT_PATH)/drivers_8258.mk
 -include $(PROJECT_PATH)/div_mod.mk
 
diff --git a/src/app.c b/src/app.c
index e5848d25..ea7d8ba0 100644
--- a/src/app.c
+++ b/src/app.c
@@ -90,10 +90,6 @@ const cfg_t def_cfg = {
 		.hw_cfg.hwver = 6,
 #endif
 #if USE_FLASH_MEMO
-		.hw_cfg.clock = 1,
-#endif
-#if USE_FLASH_MEMO
-		.hw_cfg.memo = 1,
 #if (DEVICE_TYPE == DEVICE_LYWSD03MMC) || (DEVICE_TYPE == DEVICE_CGDK2)
 		.averaging_measurements = 60, // * measure_interval = 10 * 60 = 600 sec = 10 minutes
 #else // DEVICE_TYPE == DEVICE_MHO_C401 & DEVICE_CGG1
@@ -107,7 +103,7 @@ RAM cfg_t cfg;
 static const external_data_t def_ext = {
 		.big_number = 0,
 		.small_number = 0,
-		.vtime_sec = 60 * 10, // 10 minutes
+		.vtime_sec = 60, // 1 minutes
 		.flg.smiley = 7, // 7 = "(ooo)"
 		.flg.percent_on = true,
 		.flg.battery = false,
@@ -119,7 +115,8 @@ RAM uint32_t pincode;
 #endif
 
 __attribute__((optimize("-Os")))
-static void set_hw_version(void) {
+void set_hw_version(void) {
+	cfg.hw_cfg.reserved = 0;
 	if(sensor_i2c_addr == (SHTC3_I2C_ADDR << 1))
 		cfg.hw_cfg.shtc3 = 1; // = 1 - sensor SHTC3
 	else
@@ -156,7 +153,7 @@ static void set_hw_version(void) {
 #elif DEVICE_TYPE == DEVICE_CGDK2
 	cfg.hw_cfg.hwver = 6;
 #else
-	cfg.hw_cfg.hwver = 4;
+	cfg.hw_cfg.hwver = 15;
 #endif
 }
 
@@ -208,9 +205,6 @@ __attribute__((optimize("-Os"))) void test_config(void) {
 		cfg.min_step_time_update_lcd = 10; // min 10*0.05 = 0.5 sec
 	min_step_time_update_lcd = cfg.min_step_time_update_lcd * (100 * CLOCK_16M_SYS_TIMER_CLK_1MS);
 
-	cfg.hw_cfg.clock = USE_CLOCK;
-	cfg.hw_cfg.memo = USE_FLASH_MEMO;
-	cfg.hw_cfg.trg = USE_TRIGGER_OUT;
 	my_RxTx_Data[0] = CMD_ID_CFG;
 	my_RxTx_Data[1] = VERSION;
 	memcpy(&my_RxTx_Data[2], &cfg, sizeof(cfg));
@@ -325,6 +319,7 @@ uint32_t get_mi_hw_version(void) {
 #endif // DEVICE_TYPE == DEVICE_LYWSD03MMC
 //------------------ user_init_normal -------------------
 void user_init_normal(void) {//this will get executed one time after power up
+	bool next_start = false;
 	if (get_battery_mv() < MIN_VBAT_MV) // 2.2V
 		cpu_sleep_wakeup(DEEPSLEEP_MODE, PM_WAKEUP_TIMER,
 				clock_time() + 120 * CLOCK_16M_SYS_TIMER_CLK_1S); // go deep-sleep 2 minutes
@@ -333,7 +328,8 @@ void user_init_normal(void) {//this will get executed one time after power up
 	uint32_t hw_ver = get_mi_hw_version();
 #endif
 	// Read config
-	if (flash_supported_eep_ver(EEP_SUP_VER, VERSION)) {
+	next_start = flash_supported_eep_ver(EEP_SUP_VER, VERSION);
+	if (next_start) {
 		if(flash_read_cfg(&cfg, EEP_ID_CFG, sizeof(cfg)) != sizeof(cfg))
 			memcpy(&cfg, &def_cfg, sizeof(cfg));
 		if(flash_read_cfg(&cmf, EEP_ID_CMF, sizeof(cmf)) != sizeof(cmf))
@@ -387,6 +383,11 @@ void user_init_normal(void) {//this will get executed one time after power up
 #if (DEVICE_TYPE == DEVICE_LYWSD03MMC) || (DEVICE_TYPE == DEVICE_CGDK2)
 	update_lcd();
 #endif
+	if(!next_start) { // first start?
+		if(!cfg.hw_cfg.shtc3) // sensor SHT4x ?
+			cfg.flg.lp_measures = 1;
+		flash_write_cfg(&cfg, EEP_ID_CFG, sizeof(cfg));
+	}
 	start_measure = 1;
 }
 
diff --git a/src/app.h b/src/app.h
index a0f908a4..479d3834 100644
--- a/src/app.h
+++ b/src/app.h
@@ -70,14 +70,22 @@ typedef struct __attribute__((packed)) _cfg_t {
 	uint8_t rf_tx_power; // RF_POWER_N25p18dBm .. RF_POWER_P3p01dBm (130..191)
 	uint8_t connect_latency; // +1 x0.02 sec ( = connection interval), Tmin = 1*20 = 20 ms, Tmax = 256 * 20 = 5120 ms
 	uint8_t min_step_time_update_lcd; // x0.05 sec, 0.5..12.75 sec (10..255)
+#if 0 // old version < 3.6
 	struct __attribute__((packed)) {
 		uint8_t hwver		: 3; // 0 - LYWSD03MMC B1.4, 1 - MHO-C401, 2 - CGG1, 3 - LYWSD03MMC B1.6, 4 - LYWSD03MMC B1.9, 5 - LYWSD03MMC B1.7
 		uint8_t clock		: 1; // uses clock (old version < 3.6)
 		uint8_t memo		: 1; // uses flash write measures
 		uint8_t trg			: 1; // uses trigger out
-		uint8_t mi_beacon	: 1; // advertising uses mi crypto beacon
+		uint8_t reserved	: 1; // reserved
 		uint8_t shtc3		: 1; // =1 - sensor SHTC3, = 0 - sensor SHT4x
 	} hw_cfg; // read only
+#else
+	struct __attribute__((packed)) {
+		uint8_t hwver		: 4; // 0 - LYWSD03MMC B1.4, 1 - MHO-C401, 2 - CGG1, 3 - LYWSD03MMC B1.6, 4 - LYWSD03MMC B1.9, 5 - LYWSD03MMC B1.7, 6 - CGDK2
+		uint8_t reserved	: 3; // reserved
+		uint8_t shtc3		: 1; // =1 - sensor SHTC3, = 0 - sensor SHT4x
+	} hw_cfg; // read only
+#endif
 	uint8_t averaging_measurements; // * measure_interval, 0 - off, 1..255 * measure_interval
 }cfg_t;
 extern cfg_t cfg;
@@ -166,6 +174,7 @@ extern uint32_t connection_timeout;
 extern uint32_t measurement_step_time;
 void ev_adv_timeout(u8 e, u8 *p, int n);
 void test_config(void);
+void set_hw_version(void);
 void reset_cache(void);
 
 void blc_newMacAddress(int flash_addr, u8 *mac_pub, u8 *mac_rand);
diff --git a/src/app_config.h b/src/app_config.h
index 626e4d0c..674734bb 100644
--- a/src/app_config.h
+++ b/src/app_config.h
@@ -4,7 +4,7 @@
 extern "C" {
 #endif
 
-#define VERSION 0x35	 // BCD format (0x34 -> '3.4')
+#define VERSION 0x36	 // BCD format (0x34 -> '3.4')
 #define EEP_SUP_VER 0x09 // EEP data minimum supported version
 
 #define DEVICE_LYWSD03MMC   0x055B	// LCD display LYWSD03MMC
@@ -33,6 +33,8 @@ extern "C" {
 #define USE_MIHOME_BEACON			1 // = 1 Compatible with MiHome beacon encryption
 #define USE_NEW_OTA					0 // = 1 keeping the old firmware, erasing the region when updating (test version only!)
 
+#define UART_PRINT_DEBUG_ENABLE		0 // =1 use u_printf() (PA7/SWS), source: SDK/components/application/print/u_printf.c
+
 #if DEVICE_TYPE == DEVICE_MHO_C401
 
 // TLSR8251F512ET24
@@ -279,6 +281,16 @@ extern "C" {
 
 #endif // DEVICE_TYPE == ?
 
+#if UART_PRINT_DEBUG_ENABLE
+#define PRINT_BAUD_RATE 1500000 // real 1000000
+#define DEBUG_INFO_TX_PIN	GPIO_PA7 // SWS
+#define PA7_DATA_OUT		1
+#define PA7_OUTPUT_ENABLE	1
+#define PULL_WAKEUP_SRC_PA7 PM_PIN_PULLUP_1M
+#define PA7_FUNC		AS_GPIO
+#endif // UART_PRINT_DEBUG_ENABLE
+
+
 #define MODULE_WATCHDOG_ENABLE		0
 #define WATCHDOG_INIT_TIMEOUT		250  //ms
 
diff --git a/src/cmd_parser.c b/src/cmd_parser.c
index cecefc7b..e925b848 100644
--- a/src/cmd_parser.c
+++ b/src/cmd_parser.c
@@ -284,13 +284,15 @@ __attribute__((optimize("-Os"))) void cmd_parser(void * p) {
 				memcpy(&cfg, &req->dat[1], len);
 			}
 			test_config();
+			set_hw_version();
 			ev_adv_timeout(0, 0, 0);
-			if(cmd != CMD_ID_CFG_NS) // Get/set config (not save to Flash)
+			if(cmd != CMD_ID_CFG_NS)	// Get/set config (not save to Flash)
 				flash_write_cfg(&cfg, EEP_ID_CFG, sizeof(cfg));
 			ble_send_cfg();
 		} else if (cmd == CMD_ID_CFG_DEF) { // Set default config
 			memcpy(&cfg, &def_cfg, sizeof(cfg));
 			test_config();
+			set_hw_version();
 			ev_adv_timeout(0, 0, 0);
 			flash_write_cfg(&cfg, EEP_ID_CFG, sizeof(cfg));
 			ble_send_cfg();
diff --git a/src/uprintf.mk b/src/uprintf.mk
new file mode 100644
index 00000000..917b8ecb
--- /dev/null
+++ b/src/uprintf.mk
@@ -0,0 +1,11 @@
+
+OUT_DIR += /application/print
+
+OBJS += \
+$(OUT_PATH)/application/print/putchar.o \
+$(OUT_PATH)/application/print/u_printf.o \
+
+# Each subdirectory must supply rules for building sources it contributes
+$(OUT_PATH)/application/%.o: $(TEL_PATH)/components/application/%.c 
+	@echo 'Building file: $<'
+	@$(TC32_PATH)tc32-elf-gcc $(GCC_FLAGS) $(INCLUDE_PATHS) -c -o"$@" "$<"