def close(self):
bluetooth = Bluetooth()
bluetooth.disconnect_client()
bluetooth.deinit()
pass
class BLEUart:
def __init__(self):
self.status = {'connected': False}
self.rx_data = []
def begin(self, name):
self._ble = Bluetooth()
# Some apps require the service uuid to be part of the advertising packet for the device to show up
# as Uart capable, like the Bluefruit Connect app
self._ble.set_advertisement(
name=name,
service_uuid=unhex('6E400001-B5A3-F393-E0A9-E50E24DCCA9E'))
#self._ble.set_advertisement(name=name)
self._ble.callback(trigger=Bluetooth.CLIENT_CONNECTED
| Bluetooth.CLIENT_DISCONNECTED,
handler=self.conn_callback)
self._ble.advertise(True)
nus = self._ble.service(
uuid=unhex('6E400001-B5A3-F393-E0A9-E50E24DCCA9E'),
isprimary=True,
nbr_chars=2)
self.rx = nus.characteristic(
uuid=unhex('6E400002-B5A3-F393-E0A9-E50E24DCCA9E'),
#properties=Bluetooth.PROP_WRITE | Bluetooth.PROP_WRITE_NR,
properties=Bluetooth.PROP_WRITE_NR,
value='')
self.tx = nus.characteristic(
uuid=unhex('6E400003-B5A3-F393-E0A9-E50E24DCCA9E'),
#properties=Bluetooth.PROP_READ | Bluetooth.PROP_NOTIFY,
properties=Bluetooth.PROP_NOTIFY,
value='')
self.tx.callback(trigger=Bluetooth.CHAR_SUBSCRIBE_EVENT,
handler=self.tx_subsc_callback)
self.rx.callback(trigger=Bluetooth.CHAR_WRITE_EVENT,
handler=self.rx_callback)
def end(self):
self.status['connected'] = False
self.rx_data = []
self._ble.disconnect_client()
self._ble.deinit()
def conn_callback(self, bt):
events = bt.events()
if events & Bluetooth.CLIENT_CONNECTED:
print("Client connected")
self.status['connected'] = True
elif events & Bluetooth.CLIENT_DISCONNECTED:
print("Client disconnected")
self.status['connected'] = False
self.rx_data = []
def rx_callback(self, chr, msg):
data = chr.value()
#print('BLE data received')
strdata = str(data, 'utf-8')
#print('> ', strdata)
self.rx_data.append(strdata)
def tx_subsc_callback(self, chr, msg):
print("Client subscribed", chr.value())
def write(self, msg):
if self.status['connected'] == True:
while len(msg):
data = msg[:20]
msg = msg[20:]
print('BLE data send:')
print('<', data)
self.tx.value(data)
self.tx.value('\r\n')
def available_data(self):
return (True if (len(self.rx_data) > 0) else False)
def get_data(self):
if self.available_data():
data = self.rx_data[0]
del self.rx_data[0]
return data
else:
return 0
machine.reset()
else:
#server_adv = Adv[server_mac]
print(time.time(), "found", server_name, "at",
binascii.hexlify(server_mac)) # , "with", server_adv.rssi)
ct = 0
while True:
try:
pycom.rgbled(0x000022)
print(time.time(), ct, "connect to", server_name)
conn = bt.connect(server_mac)
print(time.time(), "connected successful", ct)
break
except Exception as e:
print(time.time(), "failed", e)
bt.disconnect_client()
pycom.rgbled(0x220000)
time.sleep(1)
if ct >= 10:
print("reset")
machine.reset()
ct += 1
pycom.rgbled(0x002200)
print(conn.isconnected())
print(conn.get_mtu())
print("Services", len(conn.services()), ":")
list_services(conn)
# print("Test:")
# S = 1
# C = 11
# for s in conn.services():