diff --git a/gex/units/DIn.py b/gex/units/DIn.py
index d8c09d3..accbbee 100644
--- a/gex/units/DIn.py
+++ b/gex/units/DIn.py
@@ -46,11 +46,19 @@ class DIn(gex.Unit):
     def on_trigger(self, sensitive_pins, callback):
         """
         Assign a trigger callback.
+        Pins are passed as a list of indices (packed), or a bitmap
         Arguments are: pins snapshot, timestamp
         """
-        for i in range(0, 16):
-            if sensitive_pins & (1 << i):
-                self.handlers[i] = callback
+
+        if type(sensitive_pins) == int:
+            L = []
+            for i in range(0,16):
+                if sensitive_pins & (1 << i) != 0:
+                    L.append(i)
+            sensitive_pins = L
+
+        for i in sensitive_pins:
+            self.handlers[i] = callback
 
     def _on_event(self, evt:EventReport):
         if evt.code == 0x00:
diff --git a/gex/units/Neopixel.py b/gex/units/Neopixel.py
index f49918b..6264a80 100644
--- a/gex/units/Neopixel.py
+++ b/gex/units/Neopixel.py
@@ -6,7 +6,7 @@ class Neopixel(gex.Unit):
     """
 
     def _type(self):
-        return 'NEOPIXEL'
+        return 'NPX'
 
     def get_len(self):
         """ Get the neopixel strip length """
diff --git a/main.py b/main.py
index 58bd8f8..73c3f72 100644
--- a/main.py
+++ b/main.py
@@ -10,6 +10,11 @@ transport = gex.TrxRawUSB(sn='0029002F-42365711-32353530')
 #transport = gex.TrxSerialSync(port='/dev/ttyACM0')
 
 with gex.Client(transport) as client:
+    #
+    # if True:
+    #     s = client.ini_read()
+    #     print(s)
+    #     client.ini_write(s)
 
     if False:
         adc = gex.ADC(client, 'adc')
@@ -28,15 +33,24 @@ with gex.Client(transport) as client:
     if True:
         adc = gex.ADC(client, 'adc')
 
-        adc.set_active_channels([16])
-        fs = adc.set_sample_rate(30000)
+        adc.set_active_channels([1])
+        fs = adc.set_sample_rate(1000)
+
+        data = adc.capture(1000)
+
+        if data is not None:
+            plt.plot(data, 'r-', lw=1)
+            plt.show()
+        else:
+            print("Nothing rx")
+
 
-        for r in range(0,8):
-            adc.set_sample_time(r)
-            data = adc.capture(1000)
-            print("sr = %d" % r)
-            std = np.std(data)
-            print(std)
+        # for r in range(0,8):
+        #     adc.set_sample_time(r)
+        #     data = adc.capture(10000)
+        #     print("sr = %d" % r)
+        #     std = np.std(data)
+        #     print(std)
 
 
         #
diff --git a/pymodoro.py b/pymodoro.py
new file mode 100644
index 0000000..3e259b4
--- /dev/null
+++ b/pymodoro.py
@@ -0,0 +1,92 @@
+import time
+import gex
+
+WK_TIME = 25
+BK_TIME = 5
+LIGHT_CNT = 30
+
+PH_BREAK = 'Break'
+PH_BREAK_OVER = 'BreakOver'
+PH_WORK = 'Work'
+PH_WORK_OVER = 'WorkOver'
+
+class Pymodoro:
+    def __init__(self):
+        self.phase = PH_BREAK_OVER
+        self.work_s = 0
+        self.break_s = 0
+        self.colors = [0x000000 for _ in range(0, LIGHT_CNT)]
+
+        client = gex.Client(gex.TrxRawUSB())
+        self.btn = gex.DIn(client, 'btn')
+        self.neo = gex.Neopixel(client, 'neo')
+        self.btn.on_trigger([0], self.on_btn)
+
+        self.switch(PH_BREAK_OVER)
+        self.display()
+
+    def display(self):
+        self.neo.load(self.colors)
+
+    def on_btn(self, snapshot, timestamp):
+        if self.phase == PH_BREAK_OVER:
+            self.switch(PH_WORK)
+            
+        elif self.phase == PH_WORK:
+            self.switch(PH_WORK) # restart
+
+        elif self.phase == PH_WORK_OVER:
+            self.switch(PH_BREAK)
+
+    def switch(self, phase):
+        print("Switch to %s" % phase)
+
+        if phase == PH_BREAK:
+            self.colors = [0x009900 for _ in range(0, LIGHT_CNT)]
+            self.break_s = BK_TIME * 60
+
+        elif phase == PH_BREAK_OVER:
+            self.colors = [0x662200 for _ in range(0, LIGHT_CNT)]
+
+        elif phase == PH_WORK:
+            self.colors = [0x990000 for _ in range(0, LIGHT_CNT)]
+            self.work_s = WK_TIME * 60
+
+        elif phase == PH_WORK_OVER:
+            self.colors = [0x113300 for _ in range(0, LIGHT_CNT)]
+
+        self.phase = phase
+
+    def extinguish(self, dark, total):
+        per_light = total / LIGHT_CNT
+        lights = int((dark + per_light / 2) / per_light)
+        for n in range(0, LIGHT_CNT - lights):
+            self.colors[n] = 0x000000
+
+    def tick(self):
+        if self.phase == PH_BREAK:
+            self.break_s -= 1
+            print("Break remain: %d s" % self.break_s)
+            self.extinguish(self.break_s, BK_TIME * 60)
+
+            if self.break_s == 0:
+                self.switch(PH_BREAK_OVER)
+
+        elif self.phase == PH_WORK:
+            self.work_s -= 1
+            print("Work remain: %d s" % self.work_s)
+            self.extinguish(self.work_s, WK_TIME * 60)
+
+            if self.work_s == 0:
+                self.switch(PH_WORK_OVER)
+
+        self.display()
+
+    def run(self):
+        while True:
+            time.sleep(1)
+            self.tick()
+
+
+a = Pymodoro()
+a.run()