= Enocean gateway using TCM120 =

== Description ==

Enocean is a low power technology started by Siemens. Check out www.enocean.com for more details.

The Enocean devices use a small telegram due to power limitations for the sensors. The current range of hardware only communicates one way. For window sensors and small button remotes this works very well. In future I hope the technology will have support for bidirectional dimmer and switch devices. For this the standards organization has created the Dolphin platform. When devices become available I will look into the new range of transceiver hardware like the TCM320.

== Gateway hardware ==

The [http://www.enocean.com/en/enocean_modules/datasheet_TCM120_02.pdf TCM120] communicates using a serial TTL protocol and can easily be interfaced to a computer using RS232. I prefer to use platform independent hardware so the interface is a RS232 TTL bridge to a network socket. For this the [http://www.eztcp.com/en/products/cse-m73.php Sollae CSE-M73]  was used.

For the RS232 communication we need to make a crossover connection between the TCM120 and Sollae device. Connect TCM120 pin 7 SER_RX to Sollae JP3 TXD and connect TCM120 pin 8 SER_TX to Sollae JP3 RXD.

Next connect a 5v power supply to both the TCM120 pin 15 is 5v and pin 16 is GND and for the Sollae RS232 pin 1 for 5v and RS232 pin 4 for GND. 

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