MSG91 SMS Gateway (India/DLT) is a build-to-order Odoo module that connects your Odoo 17, 18 or 19 instance to MSG91 and makes every message you send TRAI/DLT-compliant by design. If you operate in India, you already know the pain: SMS must go out on a registered sender ID (header) against a DLT-approved content template, and any mismatch means the message is silently blocked by the operators. This module bakes that entire compliance workflow into Odoo so your team never has to think about it.

This is not an off-the-shelf apps.odoo.com download and there is no instant-download button. ECOSIRE builds, configures and installs the module on your server (or Odoo.sh), wires it to your MSG91 account and your DLT entity, tests real delivery, and hands it over with documentation and a support window. Typical delivery is one working week from confirmed scope and access.

Under the hood it follows standard Odoo architecture. A dedicated msg91.account-style model (models.Model) stores your MSG91 auth key, base sender ID and default route, with encrypted credential fields. A msg91.template model maps each DLT-approved content template (with its DLT template ID and variable placeholders) to an Odoo message you actually want to send — so a compute method with @api.depends resolves the merge variables (customer name, order number, OTP, amount) before dispatch. Outbound messages are queued and delivered through MSG91's HTTP API, and delivery-report webhooks flow back into a msg91.sms.log model so you can see queued/sent/delivered/failed status per message. Access is locked down the Odoo way via ir.model.access.csv plus record rules, so only authorised users and the right companies can send or view SMS logs in a multi-company database.

Because it plugs into Odoo's mail and automation layer, you can fire compliant SMS from automated actions and server actions on any model — a Sale Order confirmation, an Invoice due reminder, a Delivery dispatch alert, a Helpdesk ticket update — each bound to the correct DLT template so it clears the operators every time. OTP send is exposed as a callable method for login, checkout or verification flows, and bulk SMS groups let marketing blast promotional campaigns (on the promotional/marketing route, honouring NDNC/DND rules) to contact segments. Both transactional and promotional routes are supported, with per-message route selection so transactional traffic is never mis-sent on a promotional header.

Everything is Community-compatible (no Enterprise dependency) and the same codebase supports Odoo 17, 18 and 19. You get a JSON-RPC/XML-RPC-friendly send method so external systems can push SMS through Odoo too, QWeb-free delivery logging with a clean list/form view (XML/OWL) for your operators, and full source code you own. ECOSIRE delivers it production-ready, tested against your real MSG91 credentials and DLT templates, so the first SMS your customers get is already compliant.