EK-H2 SENSIRION, EK-H2 Datasheet - Page 6

• Manufacturer Part Number: EK-H2
• Description: Sensor Evaluation Kit
• Manufacturer: SENSIRION

Specifications of EK-H2

• Kit Contents: 2 Type SHT11/5, 2 Type SHT 75 Sensors, ASD11 Board, Serial And Sensor Cable, Power Supply
• Tool / Board Applications: Humidity And Temperature Sensor
• Mcu Supported Families: SHTxx
• Development Tool Type: Hardware / Software - Eval/Demo Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Evaluation Kit EK-H2 for SHTXY
With the ASD11 microprocessor board, the digital output signal of the SHTXY is recorded and adjusted for non-
linearity and temperature dependency as described in the datasheet. It can then be transmitted to your PC by RS-
232. The board is shown in Fig. 5. with the corresponding settings of the jumpers. The serial connector of the
microprocessor board is a 9-pin female D-SUB connector and can be connected to any serial COM port (9600 baud,
8 data bits, 1 stop bit, no parity, no protocol).
Fig. 5: Microprocessor board with its corresponding jumper settings.
Die Mikroprocessorboard ASD11 can also be used with any terminal program (e.g. HyperTerminal, VersaTerm,). The
following section summarizes the commands available to control the ASD11.
Each command has to be confirmed by the Enter-Key, the commands are not case sensitive.
www.sensirion.com
5 Appendix A: ASD11 microprocessor board
B1 direct, not crossed for PC, B2 crossed for PDA.
A1
A2
A3
A4
A5
wiring inter-
face connector position B1
pin 2
pin 3
pin 5
HELP
VER
GET
GO
S
MOD=[H;D]
RAW=[0,1,D]
REGW=[yy]
REGR
settings jumpers A
de-
fault
open
open
open
open
open
open
Celsius display
Calculates real values
reserved
Relative humidity and
temperature
settings jumpers B
(default, typical for PC)
receive data RxD
transmit data TxD
signal ground GND
-
short help text
provides the version of the sensor software
starts a single measurement given as SPI value
starts continuous measurement
stops measuring
H: relative humidity and temperature on serial output
D: dewpoint and temperature on serial output
0: ASD11 calculates real values
1: ASD11 forwards raw data from sensor
D: calculates values after “GO” raw values after “GET”
Writes hex value yy into SHTxx status register
Reads SHTxx status register
closed
Fahrenheit display
Raw values
reserved
Dewpoint and temperature
reset system (rising edge)
position B2
(crossed, typical for PDA)
transmit data TxD
receive data RxD
signal ground GND
Jum per s A
Pow er
A1
A5
I nt er f ace C onnect or
AH 31 I nt er f ace
Jum per s B
B1 B2
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