There is nothing to configure: installing the module is enough.

To check the three fixes on a PoS with a CashDro terminal:

#. Open a PoS session, add a product and go to the payment screen.
#. Select the CashDro payment method. The payment line must show **0**, not the
   due amount (fix 2).
#. The drawer must start the operation and ask for the amount, instead of the
   *"An error occurred while connecting to the cashdro"* dialog (fixes 1 and 3).

These three fixes are not enough on their own: the payment flow of the base
module is broken on 18.0 for reasons of its own, and it hides every failure —
these ones included — behind that same dialog, without logging anything.
Install ``pos_payment_method_cashdro_flow_fix`` as well; its ``USAGE`` explains
how to read what actually went wrong.

The Python side is covered by the tests. The base module lives outside this
repo, so the OCA sources have to be on the addons path (mounted by
``docker-compose.yml`` from ``ODOO_SRC``, set in your local ``.env``)::

  docker-compose run --rm odoo odoo -c /etc/odoo/odoo.conf \
      --addons-path=/mnt/extra-addons,/mnt/oca/pos,/usr/lib/python3/dist-packages/odoo/addons \
      -d odoo -u pos_payment_method_cashdro_fix --test-enable --stop-after-init