Windows machine
When the windows machine wishes to begin communicating with the weather station, it sends one byte: 06

The weather station returns some undecoded data to this reply (9 bytes).

When the windows machine is done, it sends 2 bytes: ff ff

To get the current observations (curobs), the windows machine sends one byte: 00

To get the highs and lows (hilo), the windows machine sends one byte: 01

There are still many undecoded functions, including setting time and setting barometer.


Weather station

curobs:
00	hour min sec month	day year in_temp in_temp	out_temp out_temp aux_temp aux_temp	humidity humidity barometer barometer
10	light light daily_rain daily_rain	wind_speed wind_dir rainfall_rate avg_wind_speed	avg_wind_dir in_temp_rate in_temp_rate out_temp_rate	out_temp_rate aux_temp_rate aux_temp_rate barometer_rate 
20	barometer_rate hum_rate hum_rate light_rate	light_rate

The hour, min, sec, month, day, and year are all simple one-byte values - there is no conversion.  I've yet to figure out any of the other fields.


hilo:
00	in_temp_high in_temp_high in_temp_high_hour in_temp_high_min	in_temp_low in_temp_low in_temp_low_hour in_temp_low_min	out_temp_high out_temp_high out_temp_high_hour out_temp_high_min	out_temp_low out_temp_low out_temp_low_hour out_temp_low_min
10	aux_temp_high aux_temp_high aux_temp_high_hour aux_temp_high_min	aux_temp_low aux_temp_low aux_temp_low_hour aux_temp_low_min	humidity_high humidity_high humidity_high_hour humidity_high_min	humidity_low humidity_low humidity_low_hour humidity_low_min
20	barometer_high barometer_high barometer_high_hour barometer_high_min	barometer_low barometer_low barometer_low_hour barometer_low_min	wind_speed_high wind_speed_high_hour wind_speed_high_minute wind_direction_high	rain_rate_high rain_rate_high_hour rain_rate_high_min light_high
30	light_high light_high_hour light_high_min light_low	light_low light_low_hour light_low_min monthly_rain	,monthly_rain yearly_rain yearly_rain 

Haven't even tried yet.