The HLK-B11 is a BLE 5.0 serial-to-Bluetooth transparent module with a 32‑bit MCU, UART, GPIOs, PWM, and detailed electrical specifications.
The HLK‑B11 module from HaiLingKe Electronics provides a single‑mode BLE 5.0 transparent bridge between a UART interface and Bluetooth, allowing simple wireless data transfer without deep protocol knowledge. It integrates a 32‑bit MCU, 500 KB flash, 64 KB RAM, and supports AT‑command configuration.
Key features include Bluetooth 5.0 support, operating voltage 2.5‑3.6 V, up to 11 GPIOs, one UART with up to 3.2 MHz baud rate, five PWM channels, an on‑chip temperature sensor, and an external antenna. The datasheet lists dimensions, pin definitions, typical application circuits, and full electrical parameters. This manual is written in Chinese.
| Bluetooth version | 5.0 |
|---|---|
| CPU core | 32‑bit MCU |
| CPU frequency | up to 64 MHz |
| Flash memory | 500 KB |
| RAM | 64 KB |
| Operating voltage | 2.5 V – 3.6 V |
| GPIO pins | up to 11 |
| UART baud rate | up to 3.2 MHz |
| On‑chip temperature sensor | present |
| Storage temperature range | -40 °C to 105 °C |
| Average working current | 5‑8 mA |
The module operates from 2.5 V to 3.6 V.
It provides up to 11 GPIO pins.
The UART can run at a maximum baud rate of 3.2 MHz.
The module can be stored from –40 °C up to 105 °C.