diff --git a/lark1fq/main.c b/lark1fq/main.c
index c7a4ef5..54abe06 100755
--- a/lark1fq/main.c
+++ b/lark1fq/main.c
@@ -1,5 +1,6 @@
 #include "misc.h"
 #include "user_misc.h"
+#include "button.h"
 #include "ltc1867.h"
 #include "modbus.h"
 #include "filter.h"
@@ -24,16 +25,6 @@ void system_tick_init(void)
     SysTick_Config(rcc_clocks.HCLK_Frequency / 1000);
 }
 
-void led_loop(void)
-{
-    static uint32_t tick = 0;
-
-    if (system_tick_cnt - tick > 500) {
-        led_toggle(LED1);
-        tick = system_tick_cnt;
-    }
-}
-
 void device_init(void)
 {
     flag.filter = data_ltc1867.calc_flag;
@@ -47,6 +38,7 @@ void system_init(void)
     cali_update_from_flash();
     led_init(LED1 | LED2);
     heat_init();
+    button_init();
     ltc1867_init();
     modbus_init();
     filter_init();
@@ -58,6 +50,7 @@ void system_init(void)
     device_init();
     ltc2640_init();
     ms5611_init();
+    led_det_temperature_init();
 }
 
 int main(void)
@@ -72,9 +65,12 @@ int main(void)
         filter_loop();
         concentration_loop();
         adc_loop();
+        led_det_temperature_loop();
+        led_sig_loop();
         cli_loop();
         ltc2640_loop();
         ms5611_loop();
+        button_loop();
     }
     return 0;
 }
diff --git a/lark1fq/src/CMakeLists.txt b/lark1fq/src/CMakeLists.txt
index f231d3a..a3a9385 100755
--- a/lark1fq/src/CMakeLists.txt
+++ b/lark1fq/src/CMakeLists.txt
@@ -7,6 +7,7 @@ add_definitions(-DDET_TEMPERATURE_LTC1867)
 file(GLOB FILELIST
 device.c
 user_misc.c
+button.c
 ltc1867.c
 filter.c
 concentration.c
diff --git a/lark1fq/src/button.c b/lark1fq/src/button.c
new file mode 100755
index 0000000..2d236b8
--- /dev/null
+++ b/lark1fq/src/button.c
@@ -0,0 +1,138 @@
+#include "stm32f4xx_rcc.h"
+#include "stm32f4xx_gpio.h"
+#include "button.h"
+#include "device.h"
+#include "cali.h"
+#include "user_misc.h"
+
+volatile uint8_t flag_cali_by_button = 0;
+
+static void button_cali_zero(void)
+{
+    uint8_t ret;
+    uint8_t count = 0;
+
+    flag_cali_by_button = 1;
+    /* cali zero record */
+    for (uint8_t ch = 0; ch < 4; ch++) {
+        ret = cali_zero_record(ch);
+        if (ret == 0xFF) {
+            /* invalid/reference channel */
+            continue;
+        } else if (ret == 0) {
+            /* cali zero record success */
+            device_status.cali_zero_record_status[ch] = 0;
+        } else {
+            /* cali zero record failed */
+            device_status.cali_zero_record_status[ch] = ret;
+            return;
+        }
+    }
+    /* cali zero active */
+    for (uint8_t ch = 0; ch < 4; ch++) {
+        ret = cali_zero_activate(ch);
+        if (ret == 0xFF) {
+            /* invalid/reference channel */
+            count++;
+            continue;
+        } else if (ret == 0) {
+            /* cali zero active success */
+            device_status.cali_activate_status &= ~(1 << ch);
+            count++;
+        } else {
+            /* cali zero active failed */
+            device_status.cali_activate_status |= (1 << ch);
+            return;
+        }
+    }
+    flag_cali_by_button = 0;
+    /* failed or success */
+    if (count >= 4) {
+        data_cali_flash.word_remain = CALI_FLASH_WORD_CNT;
+        led_ctrl[1].times_volatile = 0;
+        led_ctrl[1].times = 3;
+        led_ctrl[1].on_volatile = 0;
+        led_ctrl[1].on = 5;
+        led_ctrl[1].off = 5;
+        led_ctrl[1].state_save = led_ctrl[1].state;
+        led_ctrl[1].state = LED_BLINK_ON;
+    }
+}
+
+static void button_cali_restore(void)
+{
+    flag_cali_by_button = 1;
+    for (uint8_t ch = 0; ch < 4; ch++) {
+        cali_restore(ch);
+        device_status.cali_restore_status &= ~(1 << ch);
+    }
+    flag_cali_by_button = 0;
+    data_cali_flash.word_remain = CALI_FLASH_WORD_CNT;
+    led_ctrl[1].times_volatile = 0;
+    led_ctrl[1].times = 5;
+    led_ctrl[1].on_volatile = 0;
+    led_ctrl[1].on = 5;
+    led_ctrl[1].off = 5;
+    led_ctrl[1].state_save = led_ctrl[1].state;
+    led_ctrl[1].state = LED_BLINK_ON;
+}
+
+static void button_reset_system(void)
+{
+    NVIC_SystemReset();
+}
+
+void button_init(void)
+{
+    GPIO_InitTypeDef  GPIO_InitStructure = {
+        .GPIO_Pin = PIN_BUTTON,
+        .GPIO_Mode = GPIO_Mode_IN,
+        .GPIO_OType = GPIO_OType_PP,
+        .GPIO_Speed = GPIO_Speed_2MHz,
+        .GPIO_PuPd = GPIO_PuPd_UP,
+    };
+
+    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
+    GPIO_Init(PORT_BUTTON, &GPIO_InitStructure);
+}
+
+int button_is_pressed(void)
+{
+    if (GPIO_ReadInputDataBit(PORT_BUTTON, PIN_BUTTON)) {
+        return 0;
+    } else {
+        return 1;
+    }
+}
+
+void button_loop(void)
+{
+    static uint32_t ms = 0;
+    static uint32_t cnt_pressed = 0;
+    static uint32_t cnt_released = 0;
+
+    if (system_tick_cnt < (ms + 100)) {
+        return;
+    }
+    ms = system_tick_cnt;
+
+    if  (button_is_pressed()) {
+        cnt_pressed++;
+        cnt_released = 0;
+    } else {
+        cnt_released++;
+        if ((cnt_pressed > 0) && (cnt_released > 2)) {
+            if (cnt_pressed < 3) {
+                /* do nothing */
+            } else if (cnt_pressed < 30) {
+                button_cali_zero();
+            } else if (cnt_pressed < 75) {
+                button_cali_restore();
+            } else {
+                button_reset_system();
+            }
+            cnt_released = 0;
+            cnt_pressed = 0;
+        }
+    }
+}
diff --git a/lark1fq/src/button.h b/lark1fq/src/button.h
new file mode 100755
index 0000000..b852512
--- /dev/null
+++ b/lark1fq/src/button.h
@@ -0,0 +1,23 @@
+#ifndef __BUTTON_H__
+#define __BUTTON_H__
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "stm32f4xx.h"
+
+#define PORT_BUTTON  (GPIOB)
+#define PIN_BUTTON   (GPIO_Pin_14)
+
+extern uint32_t system_tick_cnt;
+
+void button_init(void);
+int button_is_pressed(void);
+void button_loop(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __BUTTON_H__ */
diff --git a/lark1fq/src/cali.c b/lark1fq/src/cali.c
index 92ce082..47aa2b0 100755
--- a/lark1fq/src/cali.c
+++ b/lark1fq/src/cali.c
@@ -365,7 +365,9 @@ uint8_t cali_zero_activate(uint8_t ch)
     data_cali_flash.sig_zero[ch - 1] = data_cali_ram.sig_zero[ch - 1];
     data_cali_flash.temperature_zero[ch - 1] = data_cali_ram.temperature_zero[ch - 1];
     data_cali_flash.stage[ch - 1] = CALI_STAGE_ACTIVED; /* bit[3:0] for zero, bit[7:4] for span */
-    data_cali_flash.word_remain = CALI_FLASH_WORD_CNT;
+    if (flag_cali_by_button == 0) {
+        data_cali_flash.word_remain = CALI_FLASH_WORD_CNT;
+    }
 
     return 0;
 }
@@ -434,7 +436,9 @@ void cali_restore(uint8_t ch)
     data_cali_flash.concentration[ch - 1] = 0;
     data_cali_flash.temperature_zero[ch - 1] = 0;
     data_cali_flash.temperature_span[ch - 1] = 0;
-    data_cali_flash.word_remain = CALI_FLASH_WORD_CNT;
+    if (flag_cali_by_button == 0) {
+        data_cali_flash.word_remain = CALI_FLASH_WORD_CNT;
+    }
 }
 
 void cali_zero_parse_from_flash(uint8_t ch)
diff --git a/lark1fq/src/cali.h b/lark1fq/src/cali.h
index 2c91dae..faf2078 100755
--- a/lark1fq/src/cali.h
+++ b/lark1fq/src/cali.h
@@ -35,6 +35,7 @@ struct data_cali_s {
 
 extern struct data_cali_s data_cali_flash;
 extern struct data_cali_s data_cali_ram;
+extern volatile uint8_t flag_cali_by_button;
 
 uint8_t cali_get_zero_stage(uint8_t stage);
 uint8_t cali_get_span_stage(uint8_t stage);
diff --git a/lark1fq/src/user_misc.c b/lark1fq/src/user_misc.c
index cc32d38..f4dc1a7 100755
--- a/lark1fq/src/user_misc.c
+++ b/lark1fq/src/user_misc.c
@@ -4,6 +4,7 @@
 #include "stm32f4xx_gpio.h"
 
 struct data_gas_info_s data_gas_info __attribute__((section(".bss_ccm")));
+struct led_ctrl_s led_ctrl[2];
 
 void led_init(uint16_t led)
 {
@@ -18,6 +19,9 @@ void led_init(uint16_t led)
     RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
     GPIO_Init(PORT_LED, &GPIO_InitStructure);
     led_off(led);
+    for (uint8_t i = 0; i < 2; i++) {
+        led_ctrl[i].state = 0;
+    }
 }
 
 void led_off(uint16_t led)
@@ -35,6 +39,124 @@ void led_toggle(uint16_t led)
     GPIO_ToggleBits(PORT_LED, led);
 }
 
+void led_det_temperature_init(void)
+{
+    led_ctrl[0].times_volatile = 0;
+    led_ctrl[0].times = ~0;
+    led_ctrl[0].on_volatile = 0;
+    led_ctrl[0].on = 10;
+    led_ctrl[0].off = 10;
+    led_ctrl[0].state = LED_BLINK_ON;
+}
+
+void led_det_temperature_loop(void)
+{
+    static uint32_t ms = 0;
+    static uint32_t det_temp = 0;
+    uint32_t diff;
+
+    if (system_tick_cnt < (ms + 1000 * 60)) {
+        return;
+    }
+    ms = system_tick_cnt;
+
+    if (det_temp < device_data.detector_temperature) {
+        diff = device_data.detector_temperature - det_temp;
+    } else {
+        diff = det_temp - device_data.detector_temperature;
+    }
+    det_temp = device_data.detector_temperature;
+    if (diff < 20) {
+        /* deterator temperature is stable */
+        led_ctrl[0].state = LED_ON;
+    } else {
+        /* deterator temperature is not stable */
+        led_det_temperature_init();
+    }
+}
+
+void led_sig_loop(void)
+{
+    static uint32_t ms = 0;
+    uint8_t count = 0;
+    uint8_t led;
+
+    if (system_tick_cnt < (ms + 100)) {
+        return;
+    }
+    ms = system_tick_cnt;
+
+    for (uint8_t ch = 0; ch < 4; ch++) {
+        if (data_gas_info.id[ch] == GAS_ID_INVALID) {
+            count++;
+            continue;
+        } else {
+            if (device_data.gas_sig[ch] < 10) {
+                break;
+            } else {
+                count++;
+            }
+        }
+    }
+    if (count >= 4) {
+        /* sig is all normal, LED on */
+        led = LED_ON;
+    } else {
+        /* sig is not all normal, LED off */
+        led = LED_OFF;
+    }
+
+    if (led_ctrl[1].state == LED_BLINK_OFF || led_ctrl[1].state == LED_BLINK_ON) {
+        led_ctrl[1].state_save = led;
+    } else {
+        led_ctrl[1].state = led;
+    }
+}
+
+void led_loop(void)
+{
+    static uint32_t ms = 0;
+    uint16_t led;
+
+    if (system_tick_cnt < (ms + 100)) {
+        return;
+    }
+    ms = system_tick_cnt;
+
+    for (uint8_t i = 0; i < 2; i++) {
+        led = (i == 0) ? LED1 : LED2;
+        if (led_ctrl[i].state == LED_OFF) {
+            led_off(led);
+        } else if (led_ctrl[i].state == LED_ON) {
+            led_on(led);
+        } else {
+            if (led_ctrl[i].state == LED_BLINK_OFF) {
+                led_off(led);
+                led_ctrl[i].off_volatile++;
+                if (led_ctrl[i].off_volatile >= led_ctrl[i].off) {
+                    led_ctrl[i].off_volatile = 0;
+                    led_ctrl[i].on_volatile = 0;
+                    led_ctrl[i].state = LED_BLINK_ON;
+                    led_ctrl[i].times_volatile++;
+                    if (led_ctrl[i].times == ~0) {
+                        /* blink forever */
+                    } else if (led_ctrl[i].times_volatile >= led_ctrl[i].times) {
+                        led_ctrl[i].state = led_ctrl[i].state_save;
+                    }
+                }
+            } else if (led_ctrl[i].state == LED_BLINK_ON) {
+                led_on(led);
+                led_ctrl[i].on_volatile++;
+                if (led_ctrl[i].on_volatile >= led_ctrl[i].on) {
+                    led_ctrl[i].on_volatile = 0;
+                    led_ctrl[i].off_volatile = 0;
+                    led_ctrl[i].state = LED_BLINK_OFF;
+                }
+            }
+        }
+    }
+}
+
 void heat_init(void)
 {
     GPIO_InitTypeDef  GPIO_InitStructure = {
diff --git a/lark1fq/src/user_misc.h b/lark1fq/src/user_misc.h
index dc9d79a..6639bc7 100755
--- a/lark1fq/src/user_misc.h
+++ b/lark1fq/src/user_misc.h
@@ -29,13 +29,37 @@ struct data_gas_info_s {
     uint8_t comb;
 };
 
+#define LED_OFF       (0)
+#define LED_ON        (1)
+#define LED_BLINK_ON  (2)
+#define LED_BLINK_OFF (3)
+
+struct led_ctrl_s {
+    uint8_t state_save;      /* saved state before blink */
+    uint8_t state;           /* 0:off, 1:of, 2:blink_on, 3:blink_off */
+    uint8_t on;              /* led on time when blink, unit:0.1s */
+    uint8_t off;             /* led off time when blink, unit:0.1s */
+    uint8_t times;           /* times of blink */
+    uint8_t on_volatile;
+    uint8_t off_volatile;
+    uint8_t times_volatile;
+};
+
+extern struct led_ctrl_s led_ctrl[2];
+
 extern struct data_gas_info_s data_gas_info;
+extern uint32_t system_tick_cnt;
 
 void led_init(uint16_t led);
 void led_off(uint16_t led);
 void led_on(uint16_t led);
 void led_toggle(uint16_t led);
 
+void led_det_temperature_init(void);
+void led_det_temperature_loop(void);
+void led_sig_loop(void);
+void led_loop(void);
+
 void heat_init(void);
 void heat_on(void);
 void heat_off(void);