Changes between Version 84 and Version 85 of WikiStart

Timestamp:

2013-09-28 18:14:34 (11 years ago)

Author:

hek

Comment:

--

WikiStart

@@ -100 +100 @@
 Follow the description below on how to assemble hardware and configure each type of sensor. I've also tried to link all the hardware necessary to build each sensor [from aliexpress.com]. 
 
+You can connect more than one sensor to each Arduino. Each Pro Mini Arduino has 13 digital in/out pins and 5 analog dito. The radio uses 5 pins so there are plenty left for connecting sensors. Some of them (humidity and pressure) actually use one pin but give also give temperature information (for free) without using any extra pins.
+When connecting several sensors to one Arduino you'll also have to combine the example sketches below. Also keep in mind that it could be challenging to use interrupts (to be able to sleep most of the time) when several sensors fight for attention and some of them wants to report at a interval. 
 
 [[ArduinoGateway|Arduino Gateway]]  
@@ -105 +107 @@
 [[Image(gw.jpg, align=right, 200px)]]
 Acts as a link between Vera and your wireless sensors. 
- 
-This sketch should be downloaded to an Arduino Nano which then is connected to your Vera using a usb cable.  
-It is important to use a Nano board for the ArduinoGateway as it contains a serial usb chipset recognized directly by Vera. 
+This is a mandatory sketch that should be downloaded to an Arduino Nano. This nano is then connected to your Vera using a usb cable.  
+It is important to use a Arduino Nano board for the ArduinoGateway as it contains a serial usb chipset recognized directly by Vera. 
 
 [[DallasTemperatureSensor|Dallas Temperature Sensor]]
@@ -161 +162 @@
 https://www.sparkfun.com/arduino_guide
 
-A good start kit for building 9 sensors and 1 gateway for your Vera could consist of:
+A good start kit for building 9 sensors and one Vera gateway could consist of the following components. This is pretty
+much the list of stuff I bought when building my sensors and you can probably find the parts cheaper from other sellers. 
 
 1x Arduino Nano (and USB-cable) for the gateway\\
@@ -182 +184 @@
 
 Some pull up resistors 4k7 (used for dallas and humidity sensors)\\
-http://www.aliexpress.com/item/300pcs-Resistors-4-7K-4K7-Ohm-1-4W-5-Carbon-Film-Free-Shipping/579559008.html
+http://www.aliexpress.com/item/200-pcs-1-4W-4-7k-4k7-ohm-1-Metal-Film-Fixed-Resistor/1109852578.html
 
 Power regulators for connecting radio module to Arduino Pro Mini (which lacks 3.3v output)\\
 http://www.aliexpress.com/item/XC6206P332MR-XC6206P252MR-SOT-23-SMD-triode-transistor-Good-quality-ROHS-leave-message-model-you-need/473456552.html
+
+Base package price: $8 (Nano+USB) + $32 (Pro Minis) + $9.3 (NRF24) + $4.2 (M->F), $8 (F->F) + $5.3 (Adapter) + $3.5 (Resistors) + $5.6 (Regulators) = $76
+Average sensor price: $76/10 = $7,6
 
 == Changelog  ==