# HCM512S MCU BLE 5.4 module

## Summary

- BLE 5.4 module
- 16.6 mm x 11.2 mm x 2.1 mm
- LCC form factor
- Operating temperature range: -40°C to +85°C

## Key features

- BLE 5.4 
- 64 KB RAM, 768 KB flash
- 18 GPIOs which can be multiplexed for various interfaces including ADC, USART, I2C, I2S, PDM, SPI and PWM
- PCB antenna

## Overview

The HCM512S is a high-performance MCU Bluetooth module launched by Quectel. It boasts an ARM Cortex-M33 processor with a frequency of up to 76.8 MHz and supports BLE 5.4. The module features built-in 64 KB RAM and 768 KB flash, ensuring efficient performance.

The HCM512S is in an LCC form factor with an ultra-compact size of 16.6 mm x 11.2 mm x 2.1 mm, which optimizes the size and cost for end-products and is compatible with diverse designs.

The HCM512S is suitable for digital keys, asset tags and beacons, portable medical devices, battery-operated motion sensors, etc.

## Product Brochure

- [Quectel_Product_Brochure_V8.6.pdf](https://www.quectel.com/content/uploads/2026/05/Quectel_Product_Brochure_V8.6.pdf) - Download

## Documentation and resources

### Hardware Development Resources

- **[Quectel_HCM512S_2D_Dimensions_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fhcm512s-ble-5-4-module%2F)**  
  File Size: 144.44 KB

- **[Quectel_HCM512S_3D_Dimensions_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fhcm512s-ble-5-4-module%2F)**  
  File Size: 486.75 KB

- **[Quectel_HCM512S_Footprint&Part_V1.0](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fhcm512s-ble-5-4-module%2F)**  
  File Size: 208.37 KB

### User Guide

- **[Quectel_HCM511S&HCM512S_TE-B_User_Guide_V1.1](https://www.quectel.com/login/?redirect=https%3A%2F%2Fwww.quectel.com%2Fproduct%2Fhcm512s-ble-5-4-module%2F)**  
  File Size: 1.58 MB

## Contact

Have a question? [Contact us](https://www.quectel.com/product/hcm512s-ble-5-4-module/#contact)

## Also of interest

- [End-to-end IoT solutions provider white paper](https://www.quectel.com/)
- [Automotive modules](https://www.quectel.com/automotive-iot-modules/)
- [RTK Correction Solution](https://www.quectel.com/gnss-rtk-correction-solution/)