fix: show device info.

tools/ble5_ctrl.py

@@ -1,3 +1,5 @@
+import struct
+from datetime import datetime
 import asyncio
 from bleak import BleakScanner
 
@@ -9,23 +11,43 @@ async def main():
         print(d, d.metadata)
     BleakScanner.discovered_devices_and_advertisement_data = True
 
+
 async def scan():
     stop_event = asyncio.Event()
 
+    def mv(v):
+        return (v>>8)*1000 + (v&0xff*125//32)
+
+    def ShowDevice(device, advertising_data):
+        #print(device, advertising_data)
+        name = advertising_data.local_name
+        data = advertising_data.service_data['0000fff0-0000-1000-8000-00805f9b34fb']
+        #print(data)
+        # 6 bytes of macaddress, 
+        # follow by unt32 of unix timestamp, unt16 of battery, 1 char of temperature
+        macAddr = data[0:6]
+        # to string
+        mac = ":".join("{:02x}".format(x) for x in macAddr) 
+        adv = struct.unpack_from("<IHb", data, 6)
+        epoch = adv[0] * 60
+        dt = datetime.fromtimestamp(epoch).strftime('%Y-%m-%d %H:%M')
+        battery = mv(adv[1])
+        temp = adv[2]
+        print("%s %s %s %dmV %d°C %d" % (name, mac, dt, battery, temp, advertising_data.rssi))
+
     def callback(device, advertising_data):
         if device is not None and device.name is not None and device.name.startswith("C26_"):
             if device.name not in devMap:
                 devMap[device.name] = device
-                print(device, advertising_data)
+                ShowDevice(device, advertising_data)
                 #stop_event.set()
 
     async with BleakScanner(callback) as scanner:
         await asyncio.wait_for(stop_event.wait(), timeout=3)
 
-for i in range(10):
+print("NAME       MAC               DATE             BATTRY TEMP RSSI")
+for i in range(100):
     try:
         asyncio.run(scan())
     except Exception as e:
         pass
-
-print(devMap)