POS Cash Register Drawer Monitor
by pits GmbH https://www.pits.at , Herbert Riener https://www.pits.at$ 55.98
In-App Purchases
POS Cash Register Drawer Monitor
Monitor & auto-open the EPSON cash drawer in the Point of Sale â without an IoT Box
Odoo 19 · Point of Sale · by pits GmbH
While the drawer is open, a non-dismissible overlay blocks the whole POS â no sale continues until the drawer is closed.
POS Cash Register Drawer Monitor watches the cash drawer attached to your EPSON receipt printer and locks the Point of Sale while the drawer is open. The status is read directly from the printer over the network by a server-side proxy â no IoT Box, no extra hardware, no driver installation. If the sale has change due, the overlay shows the exact amount to hand out, frozen at the moment the drawer opens. And when the cashier closes the session, the drawer can pop open automatically so the cash can be counted right away.
What's inside
No IoT Box needed
A server-side proxy talks directly to the EPSON
ePOS endpoint of the printer. No IoT Box, no pos_iot, no
hw_escpos â the only dependency is the core Point of Sale.
Full-screen lock overlay
While the drawer is open, a non-dismissible overlay covers navbar, screens and popups. Cashiers physically cannot start the next sale before the drawer is closed â a simple, effective cash-discipline measure.
Change due on screen
If the order has change to return, the overlay shows the amount in the POS currency â frozen when the drawer opens, so it stays visible even after the POS moves on to the next order.
Auto-open at session close
When the cashier confirms the session close, the drawer pops open automatically so the cash can be counted â opt-in per POS, fired only on the real close (never on cancel) and exactly once. A printer error never blocks the close.
HTTP or HTTPS
Reach the printer over HTTP or HTTPS (self-signed printer certificates supported), on the default or a custom port â configured per Point of Sale.
Fail-safe by design
Printer unreachable? Network hiccup? The module always fails to "closed" â an offline printer never blocks your Point of Sale. The poll interval is configurable per POS (default 1 second).
Hardware quirks covered
Drawer polarity differs between printer models and wiring. A per-POS "invert status" switch adapts the detection without touching any code.
Optional audit logging
Together with the separate POS Log module, every drawer opening and closing is recorded in the POS audit trail â including unauthorized openings outside a payment. Works fine without it, too.
The change to hand out stays on screen for the whole drawer-open episode.
Set up in one minute
- Install the module â no extra hardware, no IoT Box.
- Open Point of Sale â Configuration â Settings and enter the printer IP in the new Cash Drawer Monitor section.
- Optionally adjust the poll interval, the polarity switch and the audit logging toggle.
- Open the POS â done. The overlay appears whenever the drawer opens.
Everything is configured per Point of Sale â leave the IP empty to disable monitoring for a POS.
Requirements
- An EPSON TM receipt printer with network ePOS-Print support (e.g. TM-m30, TM-T88 series with network interface).
- A cash drawer connected to the printer's kick-out (DK) port.
- The Odoo server must be able to reach the printer's IP over HTTP or HTTPS (self-signed printer certificates are supported).
- Odoo 19 Point of Sale (Community or Enterprise). Fully translated to German.
Questions or a printer model that behaves differently?
We are happy to help: herbert.riener@pits.at · www.pits.at
| Availability |
Odoo Online
Odoo.sh
On Premise
|
| Odoo Apps Dependencies |
•
Point of Sale (point_of_sale)
• Discuss (mail) • Inventory (stock) • Invoicing (account) |
| Lines of code | 446 |
| Technical Name |
pos_cash_register |
| License | OPL-1 |
| Website | https://www.pits.at |
Odoo Proprietary License v1.0 This software and associated files (the "Software") may only be used (executed, modified, executed after modifications) if you have purchased a valid license from the authors, typically via Odoo Apps, or if you have received a written agreement from the authors of the Software (see the COPYRIGHT file). You may develop Odoo modules that use the Software as a library (typically by depending on it, importing it and using its resources), but without copying any source code or material from the Software. You may distribute those modules under the license of your choice, provided that this license is compatible with the terms of the Odoo Proprietary License (For example: LGPL, MIT, or proprietary licenses similar to this one). It is forbidden to publish, distribute, sublicense, or sell copies of the Software or modified copies of the Software. The above copyright notice and this permission notice must be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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