Datasheet

2 3
HTU21D click manual
™
v100
0 100000 027271
click
™
BOARD
www.mikroe.com
2. Soldering the headers
1. Introduction
3. Plugging the board in
Once you have soldered the headers your
board is ready to be placed into the desired
mikroBUS
™
socket. Make sure to align the
cut in the lower-right part of the board with
the markings on the silkscreen at the
mikroBUS
™
socket. If all the pins
are aligned correctly, push the
board all the way into the socket.
Turn the board upward again. Make sure
to align the headers so that they are
perpendicular to the board, then solder
the pins carefully.
Turn the board upside down so that
the bottom side is facing you upwards.
Place shorter pins of the header into the
appropriate soldering pads.
Before using your click
™
board, make sure
to solder 1x8 male headers to both left
and right side of the board. Two 1x8 male
headers are included with the board in
the package.
4. Essential features
Since it requires no calibration and uses only 2
communication lines, HTU21D click
™
is great
for quickly developing reliable environmental
sensing nodes. Either for data logging (as
in a weather station), or for humidity and
temp. control in a HVAC system. The default
resolution of the signal is set to 12-bit for
relative humidity and 14-bit for temperature
readings (you can change the resolution in
the range of 8-12 bits for humidity, and 12-
14 bits for temperature.)
HTU21D click
™
1
HTU21D click
™
carries a high-precision,
easy-to-use relative humidity sensor
with temperature output. The sensor is
plug and play, requiring no calibration to
use. The measurement range of HTU21D
click
™
is from 0 to 100 percents of relative
humidity, and -40 to +125 degrees of
Celsius. The board communicates with
the target microcontroller through
mikroBUS
™
I2C lines: SCL and SDA (data).
It uses a 3.3V power supply only.