# wx.getBLEDeviceCharacteristics(Object object)

Start from base library version 1.1.0. Please remaining backward compatible.

with Promise style call: Supported

Mini Program plugin: Support, need to Mini Program base library version no less than 1.9.6

Get all the features of a service on a Bluetooth low-power device (characteristic)。

# parameter

# Object object

attribute	type	Required	Introductions
deviceId	string	yes	Bluetooth Device id。 Need has passed wx.createBLEConnection Establish a connection
serviceId	string	yes	Bluetooth Service UUID。 Need to call first wx.getBLEDeviceServices Obtain
success	function	no	Interface calls the successful callback function
fail	function	no	Interface calls failed callback functions
complete	function	no	Callback function at the end of an interface call (both successful and unsuccessful calls are executed)

# object.success callback

# parameter

# Object res

attribute	type	Introductions
characteristics	Array.&ltObject&gt	Equipment Feature List

res.characteristics Structure

attribute	type	Introductions
uuid	string	Bluetooth device feature UUID
properties	Object	Type of operation supported by this feature

properties Structure

attribute	type	Introductions
read	boolean	Does this feature support read operation
write	boolean	Does this feature support write operation
notify	boolean	Does this feature support notify operation
indicate	boolean	Does this feature support indicate operation

# error

Error code	Error message	Introductions
0	ok	normal
-1	already connect	Connected
10000	not init	Uninitialized Bluetooth adapter
10001	not available	The current Bluetooth adapter is not available
10002	No device	Specified device not found
10003	connection fail	Connection failure
10004	No service	Specified service not found
10005	No characteristic	Did not find the specified signature.
10006	No connection	Current connection disconnected
10007	property not support	Current feature does not support this operation
10008	system error	All other system reported anomalies
10009	system not support	Android System specific, system version below 4.3 Not supported WAS
10012	operate time out	Connection Timeout
10013	invalid_data	Connect deviceId Is empty or incorrectly formatted

# sample code

Preview with Developer Tool

wx.getBLEDeviceCharacteristics({
  // Here. deviceId Need has passed wx.createBLEConnection Establish a link with the corresponding device
  deviceId,
  // Here. serviceId Need to wx.getBLEDeviceServices Get in interface
  serviceId,
  success (res) {
    console.log('device getBLEDeviceCharacteristics:', res.characteristics)
  }
})