Hello, I have a heavily modified BB but still using the original E3DV6/Titan/PT100/Rumba configuration. I have ported the BB to Marlin 2.0x a while back and it has been working very well. Yesterday I downloaded Marlin 2.1.2.1 and did my usual configuration changes but now the machine boots straight to the dreaded BEEP and ERR MAXTEMP E1. There are no issues with the heater cartridge, the PT100 board, or the Rumba board. There are NO hardware changes introduced and all variables are changed over correctly. If I install the old Marlin 2.0x firmware it works just fine. I am unable to debug at all because the machine halts on boot. Is there a known change in Marlin where the PT100 needs a different setup? Thank you.
