Poohl

real_url=$(curl -Lsw '%{url_effective}' -c cookies -o /dev/null "https://stadt-wuerzburg.saas.smartcjm.com/m/stadt-wuerzburg/extern/calendar/?uid=1dcd9020-d52e-467e-aaec-59d0cfc2e198")

echo "real url ${real_url}"

post_data='action_type=next_step&step_active=3&services=&locations=&locations=30a881af-e2fe-480d-92f1-7e94156cc141&plz=&service_dbdacaa8-5898-474e-b754-1d22685c14b9_amount=0&service_ca418569-6920-4d11-8e4a-261f1d8827c7_amount=0&service_7479a4c0-338d-43f3-9d2f-152ab773e653_amount=0&service_2104c42b-5f35-4e05-a220-66cf31c8f372_amount=0&service_22f12781-6faf-42c0-a990-d4aa07851ac5_amount=0&services=950e6638-ef8e-499b-ab15-e285d6c84c47&service_950e6638-ef8e-499b-ab15-e285d6c84c47_amount=1&service_b7a019dc-1565-4f8f-90fa-172a66abf632_amount=0&service_ae62574c-edbe-467d-9090-ee4f36409091_amount=0&service_46b2990b-c7d2-4f81-89de-2f737c902d9b_amount=0&service_0e07461c-bc18-4e3c-b516-bf96bf14247d_amount=0&service_e4fb304d-82d7-4c47-a245-9f38e059a4c5_amount=0&service_df3872cc-28e0-4862-9c2b-e2c0b47ea56c_amou

Poohl

UPDATE AT THE END, got a semi-successful write.

I missed some setup that seems to be essential, but looks very similar to a standard read on the Switches side.

The response however is completely different
v generic crep ~~~~~~~~~~~~~~~~~~~~~~~vv Command for NFC
                                        vv read and buffer ntag
                                          vv sequence no
                                            vv ack sequence no
                                              vv end of transmission