AT-09 Bluetooth 4.0 UART Transceiver Module (BLE HM-10 Compatible)

The AT-09 is a low-power Bluetooth 4.0 (BLE) UART transceiver module based on the TI CC2540/CC2541 chipset. Designed for wireless serial communication between microcontrollers and mobile devices, it offers seamless integration for IoT applications, Arduino projects, and BLE-enabled devices. Fully compatible with the popular HM-10 module, the AT-09 supports transparent data transmission over BLE and can be easily configured via AT commands.

Features

• Bluetooth 4.0 BLE (Bluetooth Low Energy) for efficient, low-power wireless communication
• Compatible with HM-10 firmware and AT command set
• UART interface (3.3V logic level) for simple microcontroller integration
• Built-in onboard antenna for stable and reliable signal transmission
• Operating Voltage: 3.3V (5V-tolerant with external level shifting)
• Transmission Distance: Up to 50 meters (open space)
• Supports master-slave mode switching (default: slave)
• Ideal for Arduino, ESP32, STM32, and other development platforms

Resources

User Manual / Datasheet / Example Codes Etc.

Applications

• Wireless data logging
• IoT device communication
• Smart home systems
• BLE sensor networks
• Wireless control for robotics and embedded systems