QIACHIP WL9981TC

The WL9981TC Bluetooth transparent transmission module is a BLE 4.2 module based on the WL9981 chip. It supports both serial transparent transmission and AT commands, and primarily operates in transparent transmission mode. After the WL9981TC module starts up, it automatically begins broadcasting. A mobile device app can scan for and connect to the module. Once connected, data can be transferred between the module and the mobile device via BLE. The user's MCU can communicate bidirectionally with the mobile device through the module's serial interface. The mobile device can also perform write operations to the module via the app — the written data will be sent to the user's MCU via the serial interface. When the module receives data from the user MCU's serial interface, it automatically forwards it to the mobile device. When the WL9981TC module is in a BLE disconnected state, it enters AT command mode. AT commands are primarily used for configuring module parameters such as the serial baud rate.

• Bluetooth V4.2 standard, backward compatible with Bluetooth 4.1 and 4.0
• Simple operation, no Bluetooth protocol stack experience required
• Universal UART interface, full-duplex bidirectional communication, baud rate 9600bps – 115200bps
• High-speed transparent transmission, forwarding rate up to 10KB/S (Android) / 6KB/S (iOS)
• Serial data packets support any length below 256 bytes; packets larger than 20 bytes are automatically split for transmission
• AT command support for reading/modifying module parameters (e.g., software reset, UART baud rate modification); all parameters are retained after power-off

• Fitness equipment, such as treadmills, exercise machines, etc.
• Medical devices, such as pulse meters, blood pressure monitors, etc.
• Home leisure devices, such as remote controls, toys, etc.
• Office equipment, such as printers, scanners, etc.
• Smart home devices, such as access control systems, LED lighting control, etc.
• Commercial equipment, such as cash registers, QR code scanners, etc.
• Mobile phone accessories, such as phone anti-lost devices, etc.
• Automotive equipment, such as vehicle diagnostic tools, etc.
• Other human-machine interaction devices, etc.