Dual connectivity in a compact module The ESP32 WROOV32D module together with the P2102 driver chip provides Bluetooth compatibility and MF connectivity in a single, space efficient unit. This combination enables wireless control via BLE while supporting MF card interactions without extra boards. Compact and portable design Dimensions: 48 x 28 x 10 mm (1.88 x 1.10 x 0.39 in). Weighs only 10 g, making it easy to integrate into tight enclosures or small projects without adding noticeable bulk. Flexible power options Power the module through USB or use an external 3.3V or 5V power supply for maximum flexibility in different hardware setups and test environments. Key specifications and compatibility Module: ESP32 WROOV32D Card/driver support: P2102 driver chip for MF connectivity Connectivity: Bluetooth compatible (BLE) with MF card interaction capability Size: 48 x 28 x 10 mm Weight: 10 g Power: USB or external 3.3V/5V supply What makes it useful Small form factor enables inclusion in compact devices, wearables, and DIY projects where space is at a . The combination of BLE and MF compatibility allows you to add wireless control and legacy cardbased authentication or access features in a single module. Flexible power options simplify integration with a wide range of development boards and final products. Practical use scenarios Access control prototypes and badge readers: Build a compact door or cabinet access system that uses MF cards and BLE communication with a mobile app for setup and monitoring. IoT hubs and smart devices: Create a small BLEenabled controller that can authenticate users via MF cards while communicating status and data to a smartphone or cloud service. Rapid prototyping for BLE plus card interaction: Use in development projects where you need a readymade module that handles both Bluetooth connectivity and MF card interactions, reducing wiring and component count.