Their will be 3 rounds;
1. HR - will go through your resume
2. Hiring Manager - Will go in more details of your project and experience. Before calling you for this round the hiring manager will go through your Linkedin profile, so keep your profile updated
3. Final round of interview - which has 3 back to back interviews all back to back with team members - first part : he just asked about the projects, second interview : coding interview - easy Third round - was also coding at low level but not related to Firmware but rather more related to Software engineer level.