bluetooth

问题 Faced a problem. There is a bluetooth device with low power consumption. BLE. The goal is to send a command to the device and get the data back. For example: command - 0x** 0x** 0x**, where first 0x** - code command, second 0x - data lenght. Response mast be - 0x** 0x** 0x**. I can not send a command to the device. The device works by RFCOMM. Actually the code that is available, but it does not give a result - it says that the device is off. from bluetooth import * import socket class Work:

问题 I have to read and write some values to a Bike Smart trainer with BLE (Bluetooth Low Energy) used with Flutter. When I try to read the values from the GATT characteristic org.bluetooth.characteristic.supported_power_range (found on bluetooth.org site https://www.bluetooth.com/specifications/gatt/characteristics/ ) I get the return value of an Int List [0,0,200,0,1,0]. The GATT characteristic sais that there are 3 sint16 fields for Min., Max. and step size Watts (Power). The Byte transmission

问题 I have to read and write some values to a Bike Smart trainer with BLE (Bluetooth Low Energy) used with Flutter. When I try to read the values from the GATT characteristic org.bluetooth.characteristic.supported_power_range (found on bluetooth.org site https://www.bluetooth.com/specifications/gatt/characteristics/ ) I get the return value of an Int List [0,0,200,0,1,0]. The GATT characteristic sais that there are 3 sint16 fields for Min., Max. and step size Watts (Power). The Byte transmission

问题 I have to read and write some values to a Bike Smart trainer with BLE (Bluetooth Low Energy) used with Flutter. When I try to read the values from the GATT characteristic org.bluetooth.characteristic.supported_power_range (found on bluetooth.org site https://www.bluetooth.com/specifications/gatt/characteristics/ ) I get the return value of an Int List [0,0,200,0,1,0]. The GATT characteristic sais that there are 3 sint16 fields for Min., Max. and step size Watts (Power). The Byte transmission

问题 I have to read and write some values to a Bike Smart trainer with BLE (Bluetooth Low Energy) used with Flutter. When I try to read the values from the GATT characteristic org.bluetooth.characteristic.supported_power_range (found on bluetooth.org site https://www.bluetooth.com/specifications/gatt/characteristics/ ) I get the return value of an Int List [0,0,200,0,1,0]. The GATT characteristic sais that there are 3 sint16 fields for Min., Max. and step size Watts (Power). The Byte transmission

问题 Objective I am trying to return data from the BlueTooth device after connected because to use the read and write function, need some data. Example data name, overflowServiceUUIDs, solicitedServiceUUIDs, mtu, rssi... and many others. Because if I want to read or write I need some attributes. I am using the library react-native-ble-plx . What is happening? After the device connected I lost some values. Important type DeviceState = { connected: boolean; services: Service[]; device: Device | null

问题 Since Android M it is possible to scan for Bluetooth devices in the background even if the global location is turned off if you have enabled the Bluetooth scanning option in location settings (see screenshot). In order to scan for BLE devices, the following conditions must be met: COARSE_LOCATION or FINE_LOCATION permission granted. And one of the following: Global Location selector enabled. Bluetooth scanning option enabled (see screenshot). I can check that the permission is granted and the

问题 It seems like it would be super useful if an app existed for iPhone/Android that emulated a Bluetooth keyboard or mouse. e.g., you turn on the app, and suddenly you can type on your iPhone keyboard and your PC/PS3/etc. pairs with it as if it were a Bluetooth keyboard and receives the typed letters. This idea seems so intuitive to me that I am thinking the only reason it doesn't exist is that it is not possible, but I don't understand why it wouldn't be possible. Is there a limitation of

问题 I have an android device acting as server which connects to multiple bluetooth android clients. I understand the concept of UUID and how it is unique. My question is, can I use the same UUID for all my clients connecting to my server? If not, how do I generate a UUID for my clients programmatically and let my server know about their UUIDs. The problem started appearing after Android 8.1 where you no longer had access to bluetooth MAC address which I initially used to generate UUIDs for client

问题 I have an android device acting as server which connects to multiple bluetooth android clients. I understand the concept of UUID and how it is unique. My question is, can I use the same UUID for all my clients connecting to my server? If not, how do I generate a UUID for my clients programmatically and let my server know about their UUIDs. The problem started appearing after Android 8.1 where you no longer had access to bluetooth MAC address which I initially used to generate UUIDs for client