Quantity   Component name
1 × Plant Friends bamboo enclosures. I designed these enclosures! They are constructed out of laser cut bamboo. I designed it so all the pieces snap together and does not require any glue. The sensor node enclosure houses the Moteino, the sensors and the batteries. The base station enclosure houses the Raspberry Pi and gateway Moteino. Buy it here: http://dickson.bigcartel.com/
2 × Moteino with RF Transceiver I am using an earlier version of Moteino with the RFM12B - 915mhz transceiver. You'll need at least two of these for Plant Friends. One will be the sensor node, the other will reside with the Pi which will act as a gateway. If you want to make more sensor nodes, buy more.
1 × Protoboard 3cm x 7cm I am using 3cm x 7cm green protoboards that I got off of eBay for the sensor nodes. They are surprisingly good quality and work very well. The components that make up the sensor node, including the Moteino, will sit on this board.
1 × Soil Probe These This is just a PCB with exposed traces. You can use two nails if you wish but getting this will simplify things. Some of them come with an opamp circuit and seems to be cheaper than getting just the probes alone. We don't need that part for Plant Friends but you can save it for another project. WARNING: These probes might contain LEAD. If you are growing food, I suggest you use nails as the probe. I won't be covering that method in this article, so Google is your friend! Price: $1-2.
1 × Raspberry Pi Model B We are going to use a USB WiFi adapter for this project so either model A or B will work fine. I recommend the B because it has more RAM and the Ethernet port will give you some flexibility.
1 × USB WiFi Adapter for The Pi
1 × DHT11 Humidity and Temperature Sensor. This is an air temperature sensor and air humidity sensor in one. You'll need one for each sensor node. If you are making multiple sensor nodes, get more.
1 × AA Battery Holder (holds 4 AA batteries) The Plant Friends sensor nodes uses 4 AA batteries in series configuration. I am using this type. You'll need one for each sensor node.
1 × AA Rechargeable Batteries I recommend using rechargeable batteries because it is better for the environment. Sanyo/Panasonic Eneloops win hands down.
2 × LEDs, Any Color, 5mm Size I personally like white LEDs but you can pick any colour. We'll need two, one for the sensor node and one for the gateway.
1 × PN2222 NPN Transistor In our effort to optimize battery life, we will use this to turn on/off the humidity sensor. 1 per sensor node.
1 × 100 ohm resistors 1 for each node.
1 × 10k ohm resistors 3 for each node.
1 × 56k ohm resistors 1 for each node.
2 × 220 ohm resistors One for each node and one for the basestation.