FSC-BT3131 is a Bluetooth 5.3 low energy master&slave SoC module based on TI CC2340R5 chip, boasting very low active current consumption for extended battery life, suitable for small coin cell and energy-harvesting setups. Powered by an ARM® Cortex®-M0+ core running at 48 MHz, it features a rich peripheral set including an ultra-low power sensor controller, ideal for interfacing external sensors and collecting data autonomously while conserving power. It supports GAP, ATT/GATT, SMP, and L2CAP profiles, and integrates a Baseband controller in a small package with an integrated chip antenna, offering flexibility in product design.