Open Source / Free EHR Platform for Testing HL7

I’m looking for a solution that would let me do some testing of HL7. At the very least, I’d like to show an ADT message filing in something. I’ve looked at the free/open EHR’s but I can’t seem to tell if any of them do HL7. Any suggestions?

ADT messages are generally expressed in HL7 v2. This forum is devoted to HL7 FHIR, which is a completely different standard. There are lots of open-source FHIR implementations, but few if any support messaging.

Thanks Lloyd. I’m fully aware of the differences, but it being a community of integration minded people, I figured that someone might have a helpful answer.