A rodent trap has a base with a rodent inlet opening and interior walls which define a rodent runway which communicates with a trap interior compartment. A downwardly opening compartment with a cover defines a case which receives a sensor module mounted beneath a threshold at the entry of the rodent runway to the trap interior compartment. The module has a capacitance sensor which detects the passage of a rodent into the interior compartment, and has a programmable controller which logs each rodent entry. The module has a Bluetooth transmitter which allows the module to communicate with a pest control operator to exchange the logged information. The case encloses the sensor module and protects it from exposure to moisture, dirt, and rodent waste within the trap interior.