BeagleBone Weather
Contents
Descriptions
The BeagleBone Weather Cape provides weather data for the BeagleBone including temperature, barometric pressure, humidity, and ambient light. These weather input data can be accessed via I2C bus. The BeagleBone Weather Cape also features an LED to indicate that power is applied.
Note: Revision B is now fully compatible with BeagleBone Black.
FAQ
Please visit our Frequently Asked Questions (FAQ) page for additional help.
Revision Changes
Revision B
- SHT21 has become obsolete and is replaced by Measurement Specialties' HPP828E031.
- The Weather is now fully supported with BeagleBone Black using kernel release 3.8.13-bone45 or later. Following changes have been made to the BeagleBone Black' kernel:
- Add support for Measurement Specialties chip
- Remove the conflict pin between revision A and the BBB's eMMC (GPIO1_3)
- Pin 6 of P1 connector is removed from the board to eliminate the eMMC signal integrity issue when using Weather Cape with BBB.
Revision A
Initial release of BeagleBone Weather Cape
Software Support
- BeagleBone Weather Cape revision A is supported in Angstrom release 06-18-12 or later when using with the original BeagleBone (White). To use this revision with BeagleBone Black, there is a work-around method here.
- BeagleBone Weather Cape revision B is supported in kernel release 3.8.13-bone45 or later. This version is fully compatible with BeagleBone Black.
- BeagleBone software releases can be downloaded here
- Follow instructions here to write an image file to your SD card on a Windows machine.
Getting Started
The Weather Cape should be automatically loaded when using with BeagleBone Black as follow. The eMMC is also loaded since its conflict with the Weather Cape has been removed for revision B.
0: 54:P---L BeagleBone WEATHER CAPE,00B0,Beagleboardtoys,BB-BONE-WTHR-01
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
To view all sensor inputs at once, use the command below:
for sensor in /sys/bus/i2c/devices/i2c-1/*/*_input; do echo -n "$(basename $sensor): "; cat $sensor; done
You should see something like this
lux1_input: 419
humidity1_input: 25257
temp1_input: 29273
pressure0_input: 99692
temp0_input: 291
The results are interpreted as 419 lux, 25% humidity, 29 degrees C and 997 millibar.
Specifications
Followings are some specifications of the BeagleBone Weather Cape:
Electrical Specifications
Sensors | HTU21D (Humidity and Temperature) |
BMP085 (Pressure and Temperature) | |
TSL2550 (Ambient Light) | |
Data Interface | Two-wire |
Power | 3.3V via expansion header |
Indicators | Power LED |
Connectors | Two 46-position headers |
One 10-position header |
Mechanical Specifications
Size | 2.15" x 3.40" |
Layers | 2 |
PCB Thickness | .062" |
RoHS Compliant | Yes |
Signal Usage
The BeagleBone Weather Cape uses 4 signals including:
- VDD_3V3EXP
- I2C2_SCL
- I2C2_SDA
- GND
EEPROM
EEPROM Suport | Yes |
Board Name | BeagleBone Weather Cape |
Version | 00B0 |
Manufacturer | BeagleBoardToys |
Part Number | BB-BONE-WTHR-01 |
Pins Used | 11 |
Distributors
- BoardZoo
- Please visit Where To Buy for a list of other distributors who carry BeagleBoardToys' capes.
Product Images
Documentations
Hardware Files
BeagleBone Weather Revision B
Remaining design files are same as revision A. To download all files at once please click here
BeagleBone Weather Revision A
To download all files at once please click here
To go back to the cape list, please click here