def find_nearby_devices(self):
logger.info("===============【{}】正在检测附近的蓝牙设备===============".format(DateUtil.get_now_datetime()))
# print("Detecting nearby Bluetooth devices...")
# 可传参数 duration--持续时间 lookup-name=true 显示设备名
# 大概查询10s左右
# 循环查找次数
loop_num = 3
i = 0
try:
# print("===============【{}】附近没有蓝牙设备!再次尝试{}===============".format(DateUtil.get_now_datetime(), str(i)))
self.nearby_devices = bluetooth.discover_devices(lookup_names=True, duration=10)
# print("===============【{}】附近没有蓝牙设备!再次尝试{}===============".format(DateUtil.get_now_datetime(), str(i)))
# print(self.nearby_devices)
while self.nearby_devices.__len__() == 0 and i < loop_num:
self.nearby_devices = bluetooth.discover_devices(lookup_names=True, duration=10)
if self.nearby_devices.__len__() > 0:
break
i = i + 1
time.sleep(2)
logger.info("===============【{}】附近没有蓝牙设备!再次尝试{}===============".format(DateUtil.get_now_datetime(), str(i)))
if not self.nearby_devices:
logger.info(
"===============【{}】这附近没有蓝牙设备。程序停止!===============".format(DateUtil.get_now_datetime()))
else:
logger.info(
"===============【{}】 附近发现【{}】个蓝牙设备：{}===============".format(DateUtil.get_now_datetime(), self.nearby_devices.__len__(), self.nearby_devices))
except Exception as e:
# 不知是不是Windows的原因，当附近没有蓝牙设备时，bluetooth.discover_devices会报错。
traceback.print_exc()
logger.info(
"===============【{}】这附近没有蓝牙设备。程序停止(2)!===============".format(DateUtil.get_now_datetime()))
def find_target_device(self, target_name, target_address):
self.find_nearby_devices()
if self.nearby_devices:
for addr, name in self.nearby_devices:
if target_name == name and target_address == addr:
logger.info(
"===============【{}】找到目标蓝牙设备：设备名【{}】，地址【{}】===============".format(DateUtil.get_now_datetime(), target_name, target_address))
# print("Found target bluetooth device with address:{} name:{}".format(target_address, target_name))
self.find = True
break
if not self.find:
logger.info(
"===============【{}】这附近没有目标蓝牙设备。请打开目标设备的蓝牙。!===============".format(DateUtil.get_now_datetime()))
def connect_target_device(self, target_name, target_address):
# self.find_target_device(target_name=target_name, target_address=target_address)
self.find = True
if self.find:
logger.info(
"===============【{}】准备连接目标设备：设备名【{}】，地址【{}】。===============".format(DateUtil.get_now_datetime(), target_name, target_address))
self.sock = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
try:
self.sock.connect((target_address, 1))
logger.info(
"===============【{}】连接目标设备成功。准备接受数据!===============".format(DateUtil.get_now_datetime()))
self.connect = True
data_dtr = ""
# 以下代码根据需求更改
# while True:
# data = self.sock.recv(1024)
# data_dtr += data.decode()
# if '\n' in data.decode():
# # data_dtr[:-2] 截断"\t\n",只输出数据
# print(datetime.datetime.now().strftime("%H:%M:%S")+"->"+data_dtr[:-2])
# data_dtr = ""
except Exception as e:
traceback.print_exc()
logger.info(
"===============【{}】连接目标失败，请重新连接。===============".format(DateUtil.get_now_datetime()))
# print("connection fail\n", e)
self.connect = False
self.sock.close()
else:
logger.info(
"===============【{}】请先查找设备!===============".format(DateUtil.get_now_datetime()))
def get_arguments(request):
"""
获取请求参数
:param request:
:return:
"""
if request.method == 'GET':
logger.info("收到GET请求")
arguments = dict(request.GET)
for arg in arguments:
if type(arguments[arg]) == type([]):
arguments[arg] = arguments[arg][0]
else:
logger.info("收到POST请求")
logger.info("post-body")
logger.info(request.body.decode())
if "form" in request.content_type:
arguments = request.POST
else:
arguments = json.loads(request.body.decode())
return arguments
def close_target_device(self):
# print("Ready to close")
logger.info(
"===============【{}】准备与目标设备断开连接。===============".format(DateUtil.get_now_datetime()))
if self.connect:
self.sock.close()
def receive(self, text_data):
try:
# 这里是接受数据后的操作，下面的方法按需修改
text_data_json = json.loads(text_data)
code_ = text_data_json.get("code", None)
# print("=================================================================",self.sock)
# sock = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
try:
print("==========={}:code={}=========".format(
DateUtil.get_now_datetime(), code_))
if code_ == "10":
if self.sock:
self.sock.close()
# self.close()
# self.sock = None
self.sock = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
bt_name = text_data_json.get("bt_name", None)
bt_addr = text_data_json.get("bt_addr", None)
if not bt_addr:
return JsonResponse(
{
"status": 201,
"msg": "请选择需要连接的蓝牙设备",
"data": None
},
json_dumps_params={'ensure_ascii': False})
logger.info(
"===============【{}】准备连接目标设备：设备名【{}】，地址【{}】。==============="
.format(DateUtil.get_now_datetime(), bt_name, bt_addr))
self.sock.connect((bt_addr, 1))
data = {"status": 200, "msg": "连接成功"}
self.send(text_data=json.dumps(data))
logger.info(
"===============【{}】连接目标设备成功。准备接受数据!===============".
format(DateUtil.get_now_datetime()))
# 以下代码根据需求更改
if self.sock and (code_ == "0" or code_ == "1"
or code_ == "2"):
logger.info(
"===============【{}】准备发送数据：{}===============".format(
DateUtil.get_now_datetime(), code_))
self.sock.send(code_)
data_dtr = ""
while True:
data = self.sock.recv(1024)
# print(data)
data_dtr += data.decode()
if '\n' in data.decode():
# data_dtr[:-2] 截断"\t\n",只输出数据
# print(datetime.datetime.now().strftime("%H:%M:%S") + "->" + data_dtr[:-2])
self.send(text_data=json.dumps(data_dtr[:-2]))
break
if self.sock and code_ == 20:
logger.info(
"===============【{}】 准备断开连接!===============".format(
DateUtil.get_now_datetime()))
self.sock.close()
self.close()
except Exception as e:
traceback.print_exc()
logger.info(
"===============【{}】连接目标失败，请重新连接。===============".format(
DateUtil.get_now_datetime()))
self.sock.close()
self.close()
return JsonResponse(
{
"status": 202,
"msg": "连接目标失败，请重新连接",
"data": None
},
json_dumps_params={'ensure_ascii': False})
except Exception:
traceback.print_exc()
return JsonResponse(
{
"status": 500,
"msg": "异常!",
"errMsg": traceback.format_exc()
},
json_dumps_params={'ensure_ascii': False})