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SUNROM ELECTRONICS
Back to Humidity (6)

Humidity/Temperature Sensor

Serial Data Output

Sunrom Part# 1211

Available We dispatch same day if ordered by 4PM (excluding holidays), then courier usually takes 2-5 days.
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Downloads

Terminal-PC

This sensor measures Relative Humidity and Temperature and outputs in simple serial interface. Serial data can be viewed on PC’s terminal software at 9600 bps or interfaced with your microcontroller's RX pin.

Features

  • Fast response time / Simple 5V Supply & Interface
  • Serial data output at 9600 baud rate
  • Relative Humidity from 1%-100%
  • Temperature from +2 deg C to +60 deg C

Applications

  • Weather Stations / Environment Monitoring
  • Green Houses, Books & Archive Storage
  • Medicine Storage, Warehouse Environment Surveillance

Specification

Parameter

Value

Notes

Supply Voltage

+5V DC

Supply voltage greater than +5.5V will damage the sensor

Supply Current

20 mA

 

Temperature Range

0-60 deg C

Degree Celsius

Humidity Range

1 to 100% RH

Relative Humidity

Storage Temperature

-20 to 85 deg C

 

Humidity Accuracy

+/- 5% RH

 

Temperature Accuracy

+/- 2 deg C

 

Module Pinouts

Pin#

Pin

Name

Type I/O

Details

1

GND

Ground

Ground

Power Supply Ground

2

+5V

+5V DC Supply

Positive Supply

Power Supply Positive, Give regulated +5V DC

6

TXO

TRANSMIT-OUT

Output 5V level

Serial Data of 9600 bps, 8 bit data, no parity, 1 stop bit

Can connect directly to your MCU's RX pin.

Output Data

Sensor output is serial data at 9600 bps at 5V level. You can also use the serial data to interface to PC using MAX232 level convertor for serial port or use USB-TTL chip to get a virtual serial port on PC to which many software like Hyperterminal can be connected. Custom software can also be made to monitor the incoming data. You can also use serial interface directly with a microcontroller when you have a dedicated serial input pin available on your application to get the data for display or processing.

Serial Data Output Format

When you see data output from chip in serial at 9600 baud rate, you will get total thirteen bytes output containing reading of temperature and humidity. This data is output every second in ASCII format so you can view it on screen.

Let us see what data output you will get in serial mode. The first and last byte in serial mode are new line characters so that when you see this data in terminal you can see each new data in new line.

Example Output of Serial in terminal software:

H:058 T:024

H:058 T:024

H:058 T:024

It means Relative Humidity is 58% and Temperature is 24 degrees Celcius.

Interpreting above data for single reading of 13 bytes in below table

BYTE COUNT

HEX

DECIMAL

CHARACTER DISPLAYED

Details

1

0x0A

10

‘\n’ = LF

New Line Character

2

0x48

72

‘H’

Fixed Character H

3

0x3A

58

‘:’

Fixed Character :

4

0x30

48

‘0’

Humidity Character-Hundreds

5

0x35

53

‘5’

Humidity Character-Tens

6

0x38

56

‘8’

Humidity Character-Ones

7

0x20

32

‘ ‘

Space

8

0x54

84

‘T’

Fixed Character T

9

0x3A

58

‘:’

Fixed Character :

10

0x30

48

‘0’

Temperature Character-Hundreds

11

0x32

50

‘2’

Temperature Character-Tens

12

0x34

52

‘4’

Temperature Character-Ones

13

0x0D

13

‘\r’ = CR

New Line Character

The above values in serial data are ASCII characters. 

PCB Dimensions

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