Yes, it’s possible to use Odoo 11.0 (Community), especially with the OCA EDI module you mentioned — it's a good foundation. However, X12 support (like 850/810 documents) isn’t built-in, so you’ll likely need external parsing tools (e.g., pyx12, bots) and integrate via XML-RPC or REST APIs. For self-hosted setups, combining this with scheduled jobs or middleware can work well. If needed, HubBroker also supports such custom X12 integrations for Odoo.