documentation/content/applications/general/iot/devices/scale.md

Connect a scale

:::{important}

• In EU member states, certification is legally required to use a scale as an integrated device.
• Odoo is not certified in several countries, including France, Germany, and Switzerland. If you reside in one of these countries, you can still use a scale but without integration into your Odoo database. Alternatively, you can acquire a non-integrated certified scale that prints certified labels, which can then be scanned into your Odoo database. :::

To connect a scale to the IoT system, use a USB cable. In some cases, you may need a serial-to-US adapter to complete the connection. If the scale is compatible with an IoT system, no additional setup is required; the scale is automatically detected as soon as it is connected. If the scale is not detected, reboot the IoT box or {ref}restart the Windows virtual IoT service <iot/windows_iot/restart> and {ref}update the scale's drivers <iot_updating_iot/handlers>.

:::{note} If the scale still does not function after updating the drivers, it might not be compatible with the Odoo IoT system. In such cases, a different scale must be used. :::

Once the scale is connected to the IoT system, follow these steps to configure it in the POS settings:

1. {ref}Access the POS settings <configuration/settings> and select your POS, or click the vertical ellipsis button ({guilabel}⋮) on a POS card and click {guilabel}Edit.
2. Scroll down to the {guilabel}Connected Devices section and enable {guilabel}IoT Box.
3. Select the scale in the {guilabel}Electronic Scale field.
4. Click {guilabel}Save.

:::{seealso} {doc}Connect an IoT system to a POS </applications/sales/point_of_sale/configuration/pos_iot> :::

The scale is then available in all the {doc}POS's sessions </applications/sales/point_of_sale>. If a product is configured with a price per weight, selecting it on the {guilabel}PoS screen opens the scale popup. The cashier can then weigh the product to automatically add the correct price to the cart.

:alt: Electronic Scale dashboard view when no items are being weighed.
:scale: 80%

Ariva S scales

For Ariva S series scales (manufactured by Mettler-Toledo, LLC.) to function with IoT systems, a specific setting must be modified, and a dedicated Mettler USB-to-proprietary RJ45 cable is required.

:::{important} The official Mettler USB-to-RJ45 cable (Mettler part number 72256236) must be used. Contact Mettler or a partner to purchase an authentic cable. No other cable works for this configuration. :::

To configure the Ariva S scale for IoT system recognition, refer to page 17 of Mettler's Setup Guide for Ariva S series scales and follow these steps:

1. Hold the >T< button for eight seconds, or until {guilabel}CONF appears.

2. Press >T< until {guilabel}GRP 3 appears, then press >0< to confirm.

3. Under {guilabel}3.1, ensure the setting is set to {guilabel}1 (USB Virtual COM ports) and press >T< to cycle through the options under group 3.1.

4. Once {guilabel}3.1 is set to {guilabel}1, press >0< to confirm the selection.

5. Continue to press >0< until {guilabel}GRP 4 appears.

6. Press >T< until {guilabel}EXIT appears.

   :::{important} Do not make any other changes unless otherwise needed. :::

7. Press >0<.

8. Press >0< again to {guilabel}SAVE; the scale restarts.

9. Reboot the IoT box or {ref}restart the Windows virtual IoT service <iot/windows_iot/restart>. The scale should then appear as Toledo 8217, as opposed to the previous display, where it appeared as Adam Equipment Serial.