If you ship UK parcels and letters through Royal Mail, the daily reality is a split workflow: pick and pack in Odoo, then re-key every address, weight and service into Click & Drop or the OBA portal, print labels there, and later paste tracking numbers back into Odoo by hand. Odoo's native stock.picking and delivery-carrier framework knows how to model a shipment, but out of the box there is no Royal Mail carrier — no label PDF, no service code mapping, no manifest, no tracking. The delivery module ships generic providers and Enterprise adds a few, but Royal Mail's Click & Drop API and OBA (Online Business Account) service catalogue are not among them, so merchants are left double-entering data and reconciling tracking across two systems.

ECOSIRE builds a dedicated Royal Mail carrier that lives natively inside Odoo. We extend delivery.carrier with a royal_mail delivery type and add a configuration model (models.Model) holding your Click & Drop / OBA credentials, sender addresses and a mapping table from Odoo shipping methods to Royal Mail service codes (Tracked 24/48, Signed For, Special Delivery Guaranteed, International Tracked & Signed, letters and large letters). When a warehouse user validates a stock.picking, the module calls the Royal Mail API, creates the shipment, retrieves the label as a PDF stored on the picking, and writes the tracking reference back to carrier_tracking_ref — all inside one Odoo transaction, with @api.depends computes deriving billable weight and format from the delivery lines so the right service and price are chosen automatically.

Technically it is a clean, upgrade-safe addon. Access is governed by ir.model.access.csv plus record rules so only warehouse and shipping roles can see credentials and generate labels; API keys are stored using Odoo's config-parameter / encrypted-field pattern, never hard-coded. A QWeb report renders the day's manifest and the picking label; automated actions (ir.cron / base automation) can batch-close the manifest and poll tracking status on a schedule, updating each order's delivery state. Everything is reachable over the standard XML-RPC / JSON-RPC API too, so your other systems can trigger label creation or read tracking without touching the UI. The build targets your Odoo edition and version — Odoo 17.0, 18.0 or 19.0, Community or Enterprise — and respects the differences (for example, Enterprise's studio/automation surface versus Community, and any existing delivery provider you already run alongside it).

Because this is build-to-order, you are not downloading a generic ZIP and hoping it fits. We start with a short scoping call to confirm your Royal Mail account type (Click & Drop API vs OBA), the exact services you post, your label printer and paper size, and how your Odoo is deployed. We then build the connector against those facts, validate it on a staging copy with your real service codes and addresses (UAT), and only cut over to production once you have signed off — with a documented rollback. Typical delivery is one working week from confirmed scope. You receive the full source, so nothing is a black box and you are never locked in.