[danb35]

I ran across this project the other day, and it looks intriguing. I can solder, I've played with Arduino a bit, and I'm interested in having a home weather station that I can monitor online. From what I see around the board here, it looks like it'd be easy enough to start with inexpensive sensors and upgrade over time to higher-quality units.

Looking through the parts lists for the three boards leaves me with a few questions, though:

• The lists for each board identify two Arduinos in the Designation column (ARD1, ARD2), but give a quantity of 1. Looking at the board images, I only see room for one. Am I correct in understanding that it's one Arduino Nano per board?
  
• Similarly, the RX and WD board parts lists give designations for two RX modules (RF1 and RF2), but list a quantity of 1. Never mind; I see that RF1 and RF2 on these boards are for the two sets of four pins on the RX module.
  
• The TX and WD board parts lists specify 1% metal film resistors. Is there a particular reason that this degree of accuracy is specified? A 5% carbon resistor is much more "standard".
  
• This post identifies this RF module set as working well and being a dependable seller. To build all three boards, I'd need two sets of these (1 TX module for the TX board, 1 RX and 1 TX module for the RX board, and 1 RX module for the WD board), right?
  
• What about antennas? If my count is right for the RF modules above, I'll need four antennas as well, right? Are there any particular characteristics I should look for, or just get something simple like this?
  
• Is there a particular power jack that fits the RX board? The footprint on the board looks pretty specific.
  

Doesn't look like you have many of these running in the U.S.--should be fun to add one to the number!