MAVLink simulator (source)

Hello,
What software could be used as a MAVLink simulator/generator (source of MAVLink packets, basically telemetry packets)? I need this stream of MAVLink data to test my MAVLink processing firmware.
Thanks,
Alex

What exactly are you trying to do? Can you give some context?

One of tasks is conversion MAVLink into OD ID.

Hi Julian,
I’m looking for MAVLink simulator/generator that generates OPEN_DRONE MAVLink packets: #12900, …#12905, #12915, #12918.
Thanks,
Alex

Have you seen this?

PX4 should be publishing some of it: mavlink: initial OPEN_DRONE_ID_BASIC_ID/OPEN_DRONE_ID_LOCATION support by dagar · Pull Request #20348 · PX4/PX4-Autopilot · GitHub