Visited on July 13 and did a short charge with Swisscharge RFID on the DC charger.
I reached 50kW without any issue.
The 4 chargers listed on Swisscharge have green parking spaces labelled "öffentliche ladestation". There are 4 additional AC chargers with yellow parking spaces to the left. Only the chargers visible on Swisscharge have QR codes, but the 4 other have their Swisscharge ID printed, and the ad-hoc payment pages work when manually typing the ID. I think this means you could also start a charge with the RFID on them.
The numbers on the payment page don't seem to be in order though. From left to right, as printed on the poles:
221399 payment page doesn't load221400 Mieterparkplatz Nr. 3221398 Mieterparkplatz Nr. 1221401 Mieterparkplatz Nr. 4221393 Besucherparkplatz Nr. 5221394 Besucherparkplatz Nr. 6
The DC charger is priced at 91ct/kWh, this is absolutely outrageous... I wonder if their customers can get access to a reasonable tariff.