MicroEJ Binary Loader enables manufacturers to to install, update, and stream application binaries over-the-air with a deployment strategy tailored to their device constraints and infrastructure.
Three Deployment Modes: A Progressive Approach
The three modes reflect increasing levels of optimization, trading device-side footprint against deployment infrastructure complexity. Manufacturers choose the mode that best matches their hardware constraints and operational setup.
INCLUDED BY MEJ32 IP
The application is compiled and linked together with the VEE container and the OS into a single firmware image. There is no dynamic loading: the app ships as part of the firmware binary. This approach requires no infrastructure changes and carries no additional runtime overhead. Any app update, however, requires a full firmware rebuild and reflash.
Advantages
INCLUDED IN TRUSTAPP IP
This mode produces the smallest possible dynamically loaded binary. All linking information is resolved on the server side before delivery: the binary is generated by the deployment infrastructure and tailored precisely to the target device’s kernel, then streamed directly to the device. On receipt, the application executes in place — no local adaptation step, no temporary memory required.
Additionally, the same binary can be loaded in any compatible kernel for maintenance mode, relieving device makers from deploying a new binary each time.
Advantages
OPTIONAL COMMERCIAL LIBRARY
In this mode, the application is fully portable across any VEE instance with compatible APIs, regardless of the underlying kernel version or hardware.
The resulting binary is larger but self-contained: it carries all the information needed for installation without requiring network connectivity at install time. A lightweight adaptation step runs locally on the device, requiring temporary RAM memory for finalizing the app linking to the VEE kernel present on that specific device.
The right deployment mode depends on your device’s memory budget, network topology, and the infrastructure complexity your team can support.
When device cost is the primary constraint, the memory-optimized dynamic mode is the natural choice. It keeps firmware updates (maintenance, bug fixes, CVEs) independent from app updates, reducing operational overhead on ultra-constrained devices.
As soon as memory allows, the portable dynamic mode (portable app binary) is worth considering: the simpler infrastructure offsets the additional footprint.
Binary Loader is available as a commercially licensed Enterprise Library, designed to integrate with MICROEJ VEE and complement the TrustAPP secure multi-sandboxing IP.
Pairs with TrustAPP
Combine Binary Loader with TrustAPP to manage the full application lifecycle (load, start, stop, uninstall) with security isolation and resource control per application.
▷ More info about TrustApp IP.