This videos shows an email client app running on a STM32F434 from STMicroelectronics, ARM Cortex-M4 @168MHz. This board is equiped with a 32-bit 640×480 LCD display.

The Java platform was designed with the MicroEJ IDE that includes a UI library, the Board Support Package, Keil RTX. It supports the ChromART from ST and transparency.

Some key figures:
– Java virtual machine: 28KB flash, 1.5 KB RAM
– 4% CPU load with 4 layers

Download a 30-day free trial version of MicroEJ from