Redundant injection device status indication

A device for delivering a drug from a reservoir comprising:

• a drug reservoir including a transparent portion through which an interior of the du reservoir is visible such that a payload status of the drug reservoir can be discerned from a vantage point outside the device;
• a housing with a space shaped to hold the drug reservoir and a window adjacent the space, the housing defining an optical path from the vantage point outside the device through the window and the transparent portion of the drug reservoir to the interior of the reservoir;
• and
• a generator of a coded light signal, said generator positioned so that at least a portion of said coded light signal overlaps said transparent portion of the drug reservoir and window from said vantage point along the optical path and is viewable through the transparent portion, window, and drug reservoir to assess the payload status of the drug reservoir.

A method of indicting a status of a system for delivering a drug, the system including a housing with a space shaped to hold a reservoir for said drug and a window adjacent the space, the method comprising:

• exposing an internal portion of said reservoir to a vantage point outside the housing via an optical path, the optical path extending through the internal portion of the reservoir and the window adjacent the reservoir to the vantage point outside the housing;
• generating a coded light signal;
• and
• indicating a status of the system with said coded light signal transmitting said coded light signal along said optical path to said vantage point viewable simultaneously with the payload of the reservoir along said optical path through the window and reservoir to assess the payload status of the reservoir such that a payload status of the reservoir can be discerned from a vantage point along the optical path and outside the device.