So I got the Arduino, and battery packs and I'm just waiting for the servo. I've been looking into the making my temperature sensor wireless nodes. At first I was thinking that the xbee was going to be my best bet, but after doing some more research, and messaging a few members, I'm thinking that RF will work out well. I have seen a lot of people using the RFM12, or RFM12B, but I think that I can use the RF-2400 for a good amount less money. What do you guys think.
I have attached a schematic of what I think should work for a nice low cost, low energy usage RF node. Is it alright to use the reset pin, P1, for reading the data from the temperature sensor?
Another question that I have is how long can you sleep the ATTINY85 for, I believe I saw somewhere it was 9s.
Lastly jeelabs uses a p-mosfet to shut down the RFM12. Would it be worth it to use the ATTINY84 to have more output pins for adding a p-mosfet?
Thanks for taking the time to read my silly questions.
remote_sensor.bmp (1.01 MB)
remote_sensor.sch (225 KB)