spYdaq is a radio transmitting system of sensors measuring parameters and sending them to a central Basestation. Up to 16 transmitters communicate to a base station with each one capable of having up to three inputs: Temperature, Relative Humidity or Universal. The base station collects the data from the transmitters and connects via an RS232 serial port configured as a Modbus slave to our spYview software or any other Modbus master. There is a USB port used for configuration of the base station using the spYconfig software. The Basestation checks locally for alarm conditions with inbuilt audio and visual alarms as well as providing a switched contact output that can be used to trigger external devices.