BeagleBone Weather

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BeagleBone Weather Cape

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.


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.


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

BeagleBone Weather Pin Usage

The BeagleBone Weather Cape uses 4 signals including:

  • VDD_3V3EXP
  • I2C2_SCL
  • I2C2_SDA
  • GND


EEPROM Suport Yes
Board Name BeagleBone Weather Cape
Version 00B0
Manufacturer BeagleBoardToys
Part Number BB-BONE-WTHR-01
Pins Used 11


  • BoardZoo
  • Please visit Where To Buy for a list of other distributors who carry BeagleBoardToys' capes.

Product Images


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