An end effector for a surgical device, the end effector comprising: a body portion; and a tool assembly disposed at a distal end of the body portion, the tool assembly including: an anvil assembly having a tissue contacting surface and an outer surface; a cartridge assembly pivotally coupled to the anvil assembly, the cartridge assembly having a tissue contacting surface and an outer surface and a sensor disposed on the outer surface of the anvil assembly or on the outer surface of the cartridge assembly, the sensor configured to measure a mechanical property of at least one of the anvil assembly or the cartridge assembly, at least during an approximation of the anvil assembly and the cartridge assembly onto the target tissue; wherein the end effector further comprises: a microcontroller disposed within the body portion, the microcontroller electrically coupled to the sensor and configured to receive sensor data of the sensor corresponding to the mechanical property of at least one of the anvil assembly or the cartridge assembly and configured to process the sensor data into a property of the target tissue, and wherein the microcontroller is configured to control a function of the tool assembly in response to the processed sensor data; and a memory disposed within the body portion, the memory coupled to the microcontroller and configured to store at least one of the sensor data or the processed sensor data. a body portion; and a tool assembly disposed at a distal end of the body portion, the tool assembly including: an anvil assembly having a tissue contacting surface and an outer surface; a cartridge assembly pivotally coupled to the anvil assembly, the cartridge assembly having a tissue contacting surface and an outer surface and a sensor disposed on the outer surface of the anvil assembly or on the outer surface of the cartridge assembly, the sensor configured to measure a mechanical property of at least one of the anvil assembly or the cartridge assembly, at least during an approximation of the anvil assembly and the cartridge assembly onto the target tissue; an anvil assembly having a tissue contacting surface and an outer surface; a cartridge assembly pivotally coupled to the anvil assembly, the cartridge assembly having a tissue contacting surface and an outer surface and a sensor disposed on the outer surface of the anvil assembly or on the outer surface of the cartridge assembly, the sensor configured to measure a mechanical property of at least one of the anvil assembly or the cartridge assembly, at least during an approximation of the anvil assembly and the cartridge assembly onto the target tissue; wherein the end effector further comprises: a microcontroller disposed within the body portion, the microcontroller electrically coupled to the sensor and configured to receive sensor data of the sensor corresponding to the mechanical property of at least one of the anvil assembly or the cartridge assembly and configured to process the sensor data into a property of the target tissue, and wherein the microcontroller is configured to control a function of the tool assembly in response to the processed sensor data; and a memory disposed within the body portion, the memory coupled to the microcontroller and configured to store at least one of the sensor data or the processed sensor data. a microcontroller disposed within the body portion, the microcontroller electrically coupled to the sensor and configured to receive sensor data of the sensor corresponding to the mechanical property of at least one of the anvil assembly or the cartridge assembly and configured to process the sensor data into a property of the target tissue, and wherein the microcontroller is configured to control a function of the tool assembly in response to the processed sensor data; and a memory disposed within the body portion, the memory coupled to the microcontroller and configured to store at least one of the sensor data or the processed sensor data.