HM-BT4531 BLE 5.2 Module

The HM-BT4531 is a Bluetooth LE module based on the CMT4531 SoC. An SoC with a Cortex-M0 core (64MHz), 256kB Flash, 48kB SRAM & Bluetooth LE radio. Detailed information about the SoC can be found below in this article.

The HM-BT4531 has a compact design measuring 17 mm x 12 mm x 2.6 mm and has an integrated PCB antenna. It is intended for use with a host connected via UART (baud rate: 9.6 kbps to 500 kbps) and is controlled by AT commands. It supports LE 1M/2M PHY and LE Coded PHY according to the Bluetooth LE 5.2 protocol and Bluetooth Mesh. It is certified according to CE (EU), FCC (USA), ISED (Canada), SRRC (China).

This makes the module perfect for cost-effective applications that require a local wireless connection via Bluetooth LE. Due to the Bluetooth LE radio’s very low power consumption of 130nA in power-down mode and 1.4µA in sleep mode with RAM retention, it is ideal for battery-powered devices or sensors.

Datasheet HM-BT4531

The core of the HM-BT4531 is the Bluetooth SoC CMT4531

With the CMT4531 Bluetooth LE SoC, not only can the total current consumption be configured to be very low, but care has also been taken to ensure that no excessively high peak currents occur. These are often a knock-out criterion when using button cells with their relatively high internal resistance, which also increases further during use. Anyone who has ever used a watch battery instead of the right cell in a car key knows a thing or two about this…

Typical applications for the CMT4531 are therefore

The most important features of the Bluetooth LE radio at a glance

Further, general specification for the CMT4531: ULP Bluetooth LE-SoC

Are you interested in the HM-BT4531 or the CMT4531 for your own module development? Contact us directly or send us your enquiry