Venus contains an Atmega128 with 2 uarts hooked to 485 and 232 interfaces. A series of pads provide attachment options for a Zigbee module and a Wiznet LAN interface.

The Wiznet interface:

1. Sclk, AVR input
2. MOSI, AVR input
3. SCS, AVR output
4. MISO, AVR output
5. RST, AVR output
6. 3.3 V
7. Gnd

The Zigbee interface:

1. Rx, AVR, input
2. Tx, AVR output
3. RST, AVR output
4. 3.3 V
5. Gnd