Mul-T-Lock ENTR™ Smart Lock Solution

Document created by Lauren Percy Employee on Oct 26, 2015Last modified by Adrian Puga Candelario on Jul 31, 2019
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Digital Door Lock transforms your door into a smart one.  The ENTR™ smart lock solution allows you to control your door lock right from your smartphone, tablet and a variety of other access devices. Enter the future of smart doors while keeping your home safe and secure.



Secured by NXP A7001CM, the BLE smart lock solution allows you to control your door lock right from your smartphone, tablet and, soon to be available, fingerprint scanner.

It also allows you to securely unlock your door remotely and program scheduled access authorizations. A secure channel is established after key agreement is handled by the NXP A7001CM device. Secure storage and life-cycle of access tokens are also managed by the NXP A7001CM device.


The A700x family, in combination with wireless SoCs, provide a portfolio of Secure Elements featuring cryptographic algorithms and acceleration, secure storage and tamper detection\resistance to enable the strong authentication that is required to secure connected access control systems such as door locks.

To control the motor to lock and unlock the door and process the data acquired by the magnetometer, an ARM® Cortex®-M0+ based Kinetis L series low-power device, KL15, together with magnetometer MAG3110, are used in the ENTR smart lock. Taking advantage of the low-power modes of the KL15 to enable the system to enter into a deep-sleep mode, waking only when required to control the lock motor. Verifying the door position using the magnetometer lets the system know when the door is closed and accordingly whether to activate the lock.

As the system is battery-based both the power saving features and capabilities of the KL15 and MAG3110 contribute to keeping the average current consumption as low as possible. Another Kinetis device, the K11 based on ARM Cortex-M4, is used in the system as the host controller for the BLE module and management of other system tasks. 


Value Proposition


The A7001CM integration within the BLE stack enhances the standard Bluetooth Smart AES protocol overcoming the issue of non-trusted mobile devices as well security issues in an offline environment

This enables BLE communication over a secured channel although lock and mobile do not have preliminary knowledge of each other. (No wide spread symmetric key sharing or vulnerabilities)



ENTRWeb page
ENTR™ movieVideo


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The BLE SoC QN902x enables the BLE interface and uses the A7001 secure element for tokenization of access, remote firmware upgrades and offline local credentials management.  In addition the Kinetis family of MCUs with their low power modes allow the system to operate in sleep mode (low power) until required.