Hello, i stuck at the similar problem then neoh.
I am using an ramps 1.4 board and 2 extruders.
The config file has the following settings:
#define EXT0_JAM_PIN 3
#define EXT0_JAM_PULLUP 1
#define EXT1_JAM_PIN 3
#define EXT1_JAM_PULLUP 1
#define JAM_METHOD 3
#define JAM_ACTION 2
After downloading the firmware and sending the command M119
only the state of the endswitches was send back.
I tried differend settings with one extruder, differend jam detection settings and differend digital pins and free
endstops. But no success. The jam detection state or state of the choosen pin was not showing up by sending M119.
Has anyone an idea what is missing to get this running?
Many thanks in advanced.