Wireless Sensor Pulse Counting for Energy Meter

We currently need a circuit / PCB desinging. The PCB will be connected directly to a electric or other energy meter pulse output. An Enocean STM300 (http://www.enocean.com/en/enocean_modules/stm-300/) will count the pulses recieved and transmit the count value periodically via the Enocean Wireless network. We already have selected a small plastic box to house the PCB. The device will be battery / solar powered (please see Enocean datasheet for ref designs). We also have other similar designs using the Enocean modules. The firmware has been written but needs completing once hardware is ready. This is open for us or you to complete / test - we can supply evaluation dev kit as needed.