ST has developed a dedicated transceiver which is called SPIRIT1. This is a sub 1-GHz unit which is actually not any taller than a 100 MHz transceiver, but it ranges, with proper adaptation on the antenna and the transmission network, from 169 MHz to 956 MHz which is all of the allowed bandwidth in Europe, the United States, and Asia. The user can decide which one is best for their use and work with it. Several modulation schemes are available for the SPIRIT1 from FSK to GFSK, MSK, OOK, and ASK. Plus it offers high data rates, up to 500 kbps. Some of the most important features of this device are the sensitivity and low power consumption. The programmable output power ranges from -30 dBm to +12 dBm power, and the programmable channel spacing, 12.5 kHz minimum, is narrow to allow working with more channels. Frequency hopping is also allowed if needed in an application. AES 128-bit encryption is embedded. Additionally, antenna diversity is featured enabling the user to embed different antennas. ST has developed an embedded MAC on the chip, because it is more than a standard transceiver. It supports several standards, particularly the wireless M-BUS and the 6LowPan, plus a basic stack and a simple stack from ST that enables the user’s simple network implementation as well.