diff --git a/app.py b/app.py
index 6f439a2..468f9a6 100644
--- a/app.py
+++ b/app.py
@@ -6,6 +6,7 @@
 import configparser
 import sys
 import json
+import time
 
 _config = configparser.ConfigParser()
 DEFAULT_CONFIG_FILES = []
@@ -25,6 +26,21 @@
 
 app = Flask(__name__)
 
+# Signal decoder, exactly the same as the example in C
+def decode(c):
+    c = c ^ 0x55
+    m = c & 0x0f
+    e = (c & 0x70) >> 4
+    if e > 0:
+        m |= 0x10
+    m <<= 4
+    m |= 0x08
+    if e > 1:
+        m <<= e-1
+    if c < 0x80:
+        m = -m
+    return m
+
 @app.route("/")
 def get_code():
     """
@@ -90,4 +106,44 @@ def get_token():
                                
     #DEBUG: print(r_getdevice,file=sys.stderr)
 
-    return r_getdevice
+    #return r_getdevice
+	
+    # List all samples of stethoscope
+    #startdate=2024/2/29
+    #enddate=1 minute ago
+    offset = '00'                                          #x next available rows
+    payload = 'action=list'+"&"+ \
+               'startdate=1709136000'+"&"+ \
+               'enddate='+str(int(time.time())-60)+"&"+ \
+               'offset='+offset
+
+    r_listdevice = requests.post('https://wbsapi.withings.net/v2/stetho',
+                                headers=headers,
+                                params=payload).json()
+
+    #return r_listdevice
+
+    # Get list of all signal id
+    #sample_list = json.loads(r_listdevice)
+    signalid_list = [series['signalid'] for series in r_listdevice['body']['series']]
+
+    # Download all samples
+    for signalid in signalid_list:
+        payload = 'action=get'+"&"+ \
+                  'signalid='+str(signalid)
+
+        r_getsample = requests.post('https://wbsapi.withings.net/v2/stetho',
+                                    headers=headers,
+                                    params=payload).json()
+	# Decode samples
+        signal = r_getsample['body']['signal']
+        for i in range(len(signal)):
+	    if signal[i] <0:
+        	signal[i] += 256
+            signal[i] = decode(signal[i])
+		
+        filename = f"{signalid}.json"
+        with open(filename, 'w') as file:
+            file.write(json.dumps(r_getsample))
+		
+    return "Done!"