Pump assembly with switch

A wearable infusion pump assembly comprising:

• a reusable housing assembly;
• a disposable housing assembly including a reservoir for receiving an infusible fluid;
• a releasable engagement assembly configured to allow the reusable housing assembly to releasably engage the disposable housing assembly;
• a switch assembly configured to effectuate at least one functionality of the infusion pump assembly, the at least one functionality including a separation detection functionality;
• at least one processor disposed within the reusable housing assembly, the at least one processor configured to control the separation detection functionality for detecting separation of the wearable infusion pump assembly from a remote control assembly;
• and
• a computer readable medium coupled to the at least one processor, the computer readable medium including a plurality of instructions stored thereon which, when executed by the at least one processor, cause the at least one processor to perform operations comprising:
• transmitting a ping signal to the remote control assembly;
• monitoring for receipt of a reply signal from the remote control assembly in response to the ping signal;
• and
• if the reply signal is not received within a defined period of time, rendering an audible separation alarm.