A monitoring unit (104 111) for being mounted in a device for pest control (101 108), wherein the monitoring unit is configured for being powered by battery (411) and for wireless communication with other units in a data network, comprising: a sensor (404) for detecting an event in the device for pest control and for emitting a sensor signal a radio transceiver (403) and a control unit (405 507) configured for executing, via the radio transceiver, wireless communication comprising for transmitting a report with information from the sensor signal and for functioning as repeater. The control unit (405 507) is further configured for executing the communication within a normal mode with a nominal power consumption subsequently for putting the device, comprising the radio transceiver, in a sleep mode in which communication via the data network is suspended, and, following the course of a predetermined time interval running during the sleep mode, setting the device back to the normal mode, wherein the sleep mode has a power consumption which is intentionally lower that the nominal power consumption.
