When I went to program my first workout on the new rower the other day I realized it didn’t have the option for setting an Undefined rest period like my Ski Erg and the rowers at the gym. Turned out the firmware on this PM3 monitor was 7 versions old. It was easy to upgrade using a free utility provided by Concept2. The hardest part was finding an old USB cable for connecting the monitor, but luckily I have some for Arduino boards.