A modular RFID device includes a modular circuit pad, a modular transmission pad, and a device connection layer. The modular circuit pad includes a processing circuit to process data, the processing circuit having circuit electrical contacts. The modular transmission pad includes a transmission circuit to wirelessly transmit the data, the transmission circuit having transmission electrical contacts connected to the circuit electric contacts and over which the data is received from the modular circuit pad. The device connecting layer is between the modular circuit pad and the modular transmission pad and is separate from the transmission and circuit electrical contacts to attach the modular circuit pad with the modular transmission pad.