Caution: Please do not try this on production system. Its advisable that you test out first on your test/staging environments before you proceed with data migration.
We would advise that you look at Odoo as a completely different system and start afresh. There are significant changes in model and migrating data even if possible will require additional/custom scripting.
We would suggest
Plan for closure of OpenERP
Setup Odoo as described in configuration/setup pages
Import master data (using CSV or Excel) - export from OpenERP, cleanup, import in Odoo.
Not Ready to upgrade to Odoo, what can I do?
There might be plenty of reasons for you not to upgrade to Odoo 10 yet. For example, you are middle of the Financial Year and you maintain your accounting in OpenERP.
Bahmni 0.92 works perfectly fine with OpenERP 7. So you can install Bahmni 0.92 in a separate machine (without Odoo) and then configure settings to connect to older OpenERP 7 running separately.
To connect to older OpenERP7, you need to change a few properties of "Bahmni ERP Connect".
In the new machine, where you have installed Bahmni 0.92, find and edit the file "/opt/bahmni-erp-connect/bahmni-erp-connect/WEB-INF/classes/erp-atomfeed.properties". Change the following properties
jdbc.url=jdbc:postgresql://[OpenERP Machine IP Address or FQDN]/openerp
openerp.port=8069
openerp.host=[OpenERP machine IP Address or FQDN of the ]
openerp.database=openerp
openerp.user=[openerp login user]
openerp.password=[openerp login user password]
NOTE: For "Bahmni-erp-connect" to talk to OpenERP7 running on another machine, you need to ensure
The old machine is visible from the new machine over HTTP