Personal Radio Firmware Development

I am looking for expertise in developing a custom firmware for my personal radio. The primary functionality I aim to implement is message sharing.
Initially require firmware drawings outlining the way it works.

Skills and Experience:

- Extensive experience in firmware design, particularly for radio devices.
- In-depth understanding of both hardware and software requirements for effective firmware development.
- Proven track record of implementing complex functionalities in personal devices.

Key Deliverables:

- A firmware version that supports message sharing.
- Quality assurance for the developed firmware to ensure it works as intended.

Please include previous related projects in your proposal.