TS-4200 External Reset
From Technologic Systems Manuals
The external reset pin (DIO 9) will reset the CPU by default when it is low. You can disable this functionality to use this as a DIO by running:
ts4200ctl --resetswitchoff
The external reset pin (DIO 9) will reset the CPU by default when it is low. You can disable this functionality to use this as a DIO by running:
ts4200ctl --resetswitchoff