The Room Board is a small board with sensors for indoor monitoring of several environmental parameters:
- temperature – via either an HYT131 or a DS18B20
- humidity – via the same HYT131 sensor
- motion – via a passive infrared detector (PIR)
- light – via an LDR
Different configurations are supported – include/omit the relatively expensive HYT131 or include/omit the motion sensor. The configuration is adjusted by selecting the 1 or 2 resistors to add (not included in the kits).
The Room Board is placed over opposite ports on a JeeNode (1+4 or 2+3), like a mini-daughterboard.
This board is not available in pre-assembled form to allow lots of configuration flexibility. The HYT131 package needs moderate soldering skills.
The Room Board Kit contains a PIR motion sensor module, the HYT131 temperature + humidity sensor, an LDR light sensor, and the Room Board PCB.
The Kit No-PIR option has the HYT131, LDR, and PCB, but omits the PIR motion sensor.
The Kit No-HYT option has the PIR, LDR, and PCB, but omits the HYT131 sensor module.
The PIR only option is just the PIR module, in case you want to add it later on.
The HYT131 only option is just the HYT131 sensor, in case you want to add it later on.
This PCB only version contains just the PCB for the Room Board. No sensors, no parts, no headers.
As connectors you can use a Plug Headers set with 10 male and 10 female 6-pin headers, which makes it easy to connect multiple plugs and JeeNodes in a “standard” way. Or you can solder the board directly in place for more permanent use.
The documentation and full design details are freely available.
Note: the photos include older versions of the PCB and PIR. The v2 PCB shown is the latest layout, and the latest PIR draws <38 µA quiescent current at 3.3V.
Due to supply issues, the higher specification HYT131 replaces the SHT11. Different read out code is needed. See this weblog post for details.