A communication device for a medicament delivery device is presented that includes at least one translation detection arrangement, configured to detect a translation of at least one physical part of the medicament delivery device by utilization of a resilience and an electrical conductivity for at least one spring of the medicament delivery device. Also included is at least one change of state detection unit, configured to detect at least one change of state for the medicament delivery device based on the detected translation. The communication device further includes at least one activation unit, configured to activate the at least one change of state detection unit based on the at least one detected translation. The communication device also includes at least one transmission unit configured to provide a wireless transmission of information related to the at least one change of state to an external receiving device.
