The Room Board is a small board with sensors for in-house monitoring of some basic parameters:
- temperature - either an SHT11/SHT15 sensor or a DS18B20 1-wire sensor
- humidity - via that same SHT11/SHT15 sensor
- motion - one of two different types of passive infrared detector (PIR)
- light - via an LDR
Different configurations are supported – from including the relatively expensive SHT11 to omitting the motion sensor. Depending on configuration, 1 to 3 resistors have to be added.
The Room Board is placed over opposite ports on a JeeNode (1+4 or 2+3), like a mini-daughterboard.
The latest versions of the "rooms.pde" sketch can be found here.
Update 2010-09-01
The ELV PIR sensor has been replaced by a no-brand one with the following specifications:
See this post on the daily weblog for more details.
Configuration
There are no switches or jumpers to configure, but you must choose which components to add.
Either PIR or EPIR can be used, but not both, and either SHT11 or DS18B20.
If a Zilog EPIR is used, the LDR must be connected to LDR2, else to LDR1.
If the EPIR sensor is used, then R1 and R2 must also be added (both 100 kΩ).
If the DS18B20 1-wire sensor is used, then R3 must be added (4.7 kΩ).
Errata
The DS18B20 sensor, if used, must be mounted differently from the labeling on the board!
Header Pinouts
Design Info
Dimensions: 21.1 x 21.6 mm
CadSoft EAGLE design files: jlpcb-054.pdf / jlpcb-054.sch / jlpcb-054.brd.
This plug can be operated at 5V as well as 3.3V - but only if no EPIR is used.
This board uses the conventions of a JeePlug and can be used with the ports on a JeeNode. It can also be used with other boards and MCU's, if you hook it up properly and adapt the interface code for it.
How to Get It
http://shop.jeelabs.com/products/room-board
Related Weblog Posts
- 2009-10-10 - Room sensor board
- 2010-02-02 - Room Board assembly