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 1MB 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
▫️ Comparison Table
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| Product Image |
| Wireless Protocol |
| Chip |
| Module Flash Size (Mbits) |
| Frequency Band (MHz) |
| Package |
| Dimensions (L×W×H) (mm) |
| Operating Temp Range (℃) |
| Storage Temp Range (℃) |
| Antenna Type |
| Available GPIO |
| Min Voltage (V) |
| Max Voltage (V) |
| Typical Voltage (V) |
| Min Power Current (mA) |
| Rx Current (mA) |
| Deep Sleep Current (μA) |
| Certifications |
| Max TX Power (dBm) |
| Modulation |
2. About Modules
| Module | Datasheets | PCB Footprints | Schematics |
|---|---|---|---|
| Ai-BS21-32S | View | Download | - |
| Ai-BS21-32S-Kit | View | N/A | View |
3. Firmware Management
| Model | Firmware Build | Firmware Description | Version | Download Link | Flashing Tool |
|---|---|---|---|---|---|
| Ai-BS21-32S | ★ Build 2530 | Combo AT Standard Firmware | V0.0.10 | Download Firmware | Download |
4. Certification Related
| Module | Certificate | Link |
|---|---|---|
| Ai-BS21-32S | SRRC | View |
| Ai-BS21 Series | CE (RED) | View |
| Ai-BS21 Series | FCC | View |