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Ai-BS21 Series Special Modules

1. Product Introduction

- Overview

Ai-BS21-32S

  • Ai-BS21-32S is a Bluetooth SparkLink module developed by Ai-Thinker Co., Ltd. The core processor chip BS21 is a highly integrated 2.4GHz SoC supporting BLE5.4 and SLE1.0. It incorporates RF circuits including power amplifiers (PA), low-noise amplifiers (LNA), TX/RX switches, and an integrated power management module. It supports three bandwidths (1M/2M/4M) with a maximum data rate of 12Mbit/s.
  • The chip integrates a high-performance 32-bit microprocessor (MCU), hardware security engine, and rich peripheral interfaces, including SPI, UART, I2C, PWM, GPIO, USB2.0, NFC Tag, PDM, I2S/PCM, QDEC, and KEYSCAN keyboard scanning circuits. It features an 8-channel 13-bit ADC supporting audio AMIC input, built-in SRAM and encapsulated Flash, and supports program execution from Flash. Compatible with LiteOS, it provides an open and user-friendly development and debugging environment, suitable for PC peripherals, IoT smart terminals, and other IoT applications.

- Features

  • Supports coexistence of BLE and SLE dual modes

  • Compatible with BLE5.4

  • Supports LE 1M, LE 2M, and Long Range

  • RISC-V high-performance 32-bit CPU with a maximum frequency of 64MHz, supporting floating-point operations and SWD

  • 160KB SRAM and built-in 512KB Flash

  • Encryption methods: AES (Advanced Encryption Standard), SM4, and TRNG (True Random Number Generator)

  • Peripheral interfaces: SPI, UART, I2C, PWM, GPIO, USB2.0, NFC Tag, PDM, I2S/PCM, QDEC, KEYSCAN, etc.

  • Supports BLE whitelist parsing

  • Compatible with HID (Human Interface Device)

  • BLE service gap frequency scanning

  • BLE AFH (Adaptive Frequency Hopping) support

  • SLE1.0 protocol support, including wireless frame types 1 (GFSK) and 2 (low-latency), G-frame and T-frame, broadcast/discovery/access functions, unicast/multicast, and high-precision ranging

  • Real-time coexistence with WLAN via 3/4-wire external interface for B/SLE

  • Non-real-time coexistence with WLAN via UART for B/SLE

2. About Modules

ModuleDatasheetsPCB FootprintsSchematics
Ai-BS21-32SViewDownload-
Ai-BS21-32S-KitViewN/AView

3. Firmware Management

ModelFirmware BuildFirmware DescriptionVersionDownload LinkFlashing Tool
Ai-BS21-32S★ Build 2530Combo AT Standard FirmwareV0.0.10Download FirmwareDownload

MoudlesCertificateLink
Ai-BS21-32SSRRCView
Ai-BS21 SeriesCE (RED)View
Ai-BS21 SeriesFCCView

5. Compliance & Testing

- Hardware Reliability Report

Download full report

Released under the MIT License.