AT-09 Bluetooth 4.0 UART Transceiver Module CC2541

Description

The AT-09 Bluetooth 4.0 module provides a streamlined, low-power bridge for adding BLE connectivity to embedded systems. Its core is the CC2541 system-on-chip, which integrates a 2.4GHz RF transceiver, an 8051 MCU, and programmable flash memory. The module communicates via a simple serial TTL UART interface, making it accessible for developers using common platforms.

Power management is a key strength, with the module supporting deep sleep modes to achieve microamp-level standby currents, enabling long-term deployment on coin cell or small LiPo batteries. The integrated PCB antenna eliminates the need for an external connector, simplifying enclosure design while maintaining a practical wireless range for indoor and short-range outdoor applications.