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DeveloperDeveler s.r.l. and BeRTOS community
Written inANSI C
OS familyReal-time operating system
Working stateDiscontinued
Source modelOpen source
Initial releaseJune 3, 2004; 19 years ago (2004-06-03)
Final release2.7.99 / August 2011; 12 years ago (2011-08)
Marketing targetEmbedded systems
Available inEnglish
Update methodCompile from source code
PlatformsARM Cortex-M3, ARM ARM7TDMI, Atmel AVR, x86, x86-64
Kernel typeMicrokernel
LicenseGPLv2 or later, with exception[1][2]

BeRTOS is a real-time operating system designed for embedded systems.[3]

It is free and open-source software released under the GNU General Public License, version 2 (GPLv2) or later, with a special exception granting proprietary applications the right to keep their source code closed while keeping the base BeRTOS code open.[1][2]

It has a very modular design, that allows running it on different architectures, ranging from tiny 8-bit microcontrollers such as Atmel AVR microcontrollers up to the 32-bit ARM architecture, and on hosted environments such as Linux and Microsoft Windows. BeRTOS is written in ANSI C, and supported by popular embedded Secure Sockets Layer (SSL) and successor Transport Layer Security (TLS) libraries such as wolfSSL.

BeRTOS preemptive multitasking kernel implements many inter-process communication (IPC) primitives, including: signals, semaphores, and messages.

In addition to the kernel, BeRTOS provides a hardware abstraction layer (HAL) that includes many peripheral device drivers (timer, serial, analog-to-digital converter (ADC), motors, liquid-crystal display (LCD), NTC sensors, keyboard, buzzer, memories), algorithms (hash table, cyclic redundancy check (CRC), MD2, entropy pool, run-length encoding (RLE)), communication protocols, and a graphic windowing subsystem for small display devices.


  1. ^ a b "BeRTOS: License". Archived from the original on 2014-04-06. Retrieved 2021-06-18.
  2. ^ a b "verstag.c". GitHub. Archived from the original on 2021-06-18. Retrieved 2021-06-18. ... either version 2 of the License, or (at your option) any later version.
  3. ^ "BeRTOS: Free Embedded RTOS". SlideShare. Scribd. 2009-10-16.