daviteq WS433-CO2 User manual

WS433-CO2-MN-EN-01
JUN-2021
SKU
WS433-CO2
HW Ver.
2.5
FW Ver.
5.0
Item Code
WS433-CO2-01
WIRELESS CARBON DIOXIDE GAS SENSOR, 433MHZ, 0-40.000PPM, 2 X AA 1.5 VDC BATTERY, IP67
HW Ver.
FW Ver.
Release Date
Functions Change
2.5
5.1
MAY-2021
Innitial FW
WS433-CO2 sensor utilizes CMOSens® Technology for IR detection enables carbon dioxide measurements of the
highest accuracy at a competitive price. Along with the NDIR measurement technology for detecting CO2 comes a
best-in-class humidity and temperature sensor integrated on the same sensor module. Ambient humidity and
temperature can be measured by special algorithm expertise through modelling and compensating of external heat
sources without the need of any additional components. The wireless portion is Sub-GHz technology from Texas
Instruments allows long range transmission at ultra-low power consumption. It will connect 2-way wirelessly to the
wireless co-ordinator WS433-CL to send data and receiving the configuration. It can be configured the operation
parameters like data sending interval, health check cycle...remotely from Globiots platform or via ModbusRTU software
(thru the WS433-CL). Its default data rate is 50 kbps, can be switched to 625 bps to increase the communication range.
The sensor can last up to 5 years with 2 x AA battery.
USER GUIDE FOR WIRELESS CO2
SENSOR WITH HUMIDITY &
TEMPERATURE WS433-CO2
This document is applied for the following products
1. Functions Change Log
2. Introduction

SENSOR SPECIFICATION
CO2 Sensor technology
NDIR sensor
CO2 range/resolution/accuracy
0-40.000 ppm / 1ppm / (+/- 30ppm + 3% reading)
Repeatability
+/- 10ppm
Temperature Stability
+/- 2.5ppm / ℃ in range 0-50 ℃
Temperature range/resolution/accuracy
-40..+70 ℃ / 0.1 ℃ / ± 0.5 °C in range 0-50 ℃
Humidity range/resolution/accuracy
0-100%RH / 0.1%RH /+/- 3.0%RH in range 25-100% RH
Sensor Filter
316SS sintered filter
Sensor housing material / Rating
SS316/SS304 / for Indoor use
WIRELESS SPECIFICATION
Data speed
Up to 50kbps
Transmission distance, LOS
1000m
Antenna
Internal Antenna
Battery
02 x AA 1.5-3.6VDC, up to 5 years operation, depends on the
configuration
Frequency Band
ISM 433MHz, Sub-GHz technology from Texas Instrument, USA
3. Specification

International Compliance
ETSI EN 300 220, EN 303 204 (Europe) FCC CFR47 Part15 (US), ARIB
STD-T108 (Japan)
Vietnam Type Approval Certification
QCVN 73:2013/BTTTT, QCVN 96:2015/BTTTT (DAVITEQ B00122019)
Security Standard
AES-128
Operating temperature of PCB
-40oC..+60oC (with AA L91 Energizer)
Housing/Protection
Aluminum + Polycarbonate / IP67
Dimension
H180xW73xD42
Net weight
<400 grams
For example: the measurement time is 200mS, after this time, the node will read the value of sensor, node will switch
OFF power supply to external sensor to save energy.
The measured value is the raw value of the sensor. The measured value can be scaled according to the following
formula:
Y = aX + b
X: the raw value from the sensor
Y: the calculated value for parameter 1's value or parameter 2's value
a: constant (default value is 1)
b: constant (default value is 0)
So, if there is no user setting for a and b ==> Y = X
The Y value will be compared with Lo and Hi threshold. Please refer below the graph of alarm processing.
For example 1: At default a1=1 and b1=0. We need to calibrate the sensor to a CO2 concentration of 50 ppm and
1000 ppm. When putting the sensor in an environment with a CO2 concentration of 50 ppm and 1000 ppm, we will
have:
The raw X1 value measured at 50 ppm (Y1 value) CO2 is 70ppm, and the value of X2 value at 1000 ppm (Y2
value) is 1100 ppm. Then:
4. Operation Principle
4.1 Process of measurement
When the sensor sampling time interval is reached, For example 2 minutes, the node will wake up and switch
ON the power supply to supply the energy to external sensor to start the measurement. Depends on the type
and characteristic of external sensor, the sensor will take a certain time to finish the measurement.
Please note that the parameters below are for reference only

We solve the equation to get a and b. Then we configure parameters a1 and b1 into the sensor.
Use the offline configuration tool to configure sensor. Write in the sensor the parameters a1 and b1.
Step 1: After supplying power the Co-ordinator via M12 connector, the Node ID must be registered within the first 5
minutes, up to 40 WS.
Step 2: Bring the wireless sensor closer to the Co-ordinator's antenna then take off the wireless sensor battery, wait
for 5s then insert the battery again. If:
Buzzer plays 1 peep sound, LED blink 1 time, that means registering Node ID on Co-ordinator successfully.
Buzzer plays 2 peep sounds, LED blink 2 times, that this Node ID is already registered.
Node id added in this way will be written to the smallest node_id_n address which is = 0.
Set Rssi_threshold (see RF MODE CONFIG (in the Modbus Memmap of WS433-CL), default -25): The case if Co-
ordinator is on high position and need to add node sensor. We set the sensor as close as possible and set the
Rssi_threshold to -80, -90 or -100 to increase the sensitivity to allow WS433-CL-04 can add sensors at a longer
distance. After that, perform 2 steps of adding sensors and then reset Rssi_threshold = -25.
Enb_auto_add_sensors configuration (see RF MODE CONFIG (in the Modbus Memmap of WS433-CL)): In case
you do not want to turn off the power WS433-CL, you can set Enb_auto_add_sensors = 1, this way we have 5
minutes to add nodes (add up to 40 nodes) . After 5 minutes Enb_auto_add_sensors will automatically = 0.
if a1 and b1 in sensor are different from a1=1 and b1=0 then write down a1 and b1 numbers in
excel template configuration file
Refer to Section 4.4 for more details.
4.2 Add sensors node to Co-ordinator WS433-CL
4.2.1 Add Sensor Node ID automatically
If you do not hear the "Peep" sound, please disconnect the power the co-ordinator, wait a few minute and try
again.
Memmap resgisters

http://www.daviteq.com/en/manuals/books/long-range-wireless-co-ordinator-ws433-cl/page/user-guide-
for-long-range-wireless-co-ordinator-ws433-cl
Open the cover of sensor then use the push button to set the data transfer speed for the first 30 seconds when the
battery is first installed, after 30 seconds the push button function does not work.
Press and hold the button for 2 seconds => LED blinks once => Release the button to set Data rate RF 50kbps
Press and hold the button for 5 seconds => LED blinks twice => Release the button to set Data rate RF 625bps
Press and hold the button for 10 seconds => LED blinks 3 times => Release the button to reset RF parameters
(frequency, RF output power, data rate), if held for more than 30 seconds then the button function does not
work.
You can download Modbus Memmap of WS433-CL with the following link:
https://filerun.daviteq.com/wl/?id=WBbGm89AToHWyvIyMOc780N1KmjfUr3Y
4.2.2 Add sensor node into WS433-CL-04 (1) through intermediate
WS433-CL-04 (2) and Modbus
In case the sensor need to be added to WS433-CL-04 (1) has been installed in a high position, the
sensor cannot be brought close to WS433-CL-04 (1). For more details:
4.3 Button Function

First, you need to prepare
Step 1: Connect Antenna, RS485 - configuration cable and power supply co-ordinator
Reset default WS433:
Frequency: 433.92 MHz
RF transmit power: 15 dBm
RF data rate: 50 kbps
4.4 Configuration
Num of Node will indicate the number of nodes managed by WS433-CL.
Every time a node is added, the Num of Node will increase by 1.
Every time a node is deleted, the Num of Node is reduced by 1.
Writing Num of Node = 0 will delete all 40 node ids to 0.
If you want to delete a node id, then write it = 0 with the Write function is 16 and the Read function is 3.

Step 2: Open Modbus tool on PC
You can download Daviteq Modbus Configuration Tool with the following link:
https://filerun.daviteq.com/wl/?id=qK0PGNbY1g1fuxTqbFW9SXtEvCw7bpc6
Unzip file and run file application "Daviteq Modbus Configuration Tool Version"
Template File: https://filerun.daviteq.com/wl/?id=ItFaeQgtCmXN98J7GaPdeZvKK5eS1Dd1
How to use the Modbus configuration software

Choose COM Port (the Port which is USB cable plugged in)
Set the BaudRate: 9600, Parity: none
Click “ Connect “ untill the Status displays “disconnected” to “connected“. It means the WS433-CL-04 is
being connected with computer;
Next, we need to import the configuration file for WS433-CL-04 by importing the csv file: Go to MENU: FILE /
Import New / => select the template file.
Step 3: Configure parameters of the sensor.

In the memmap file, refer to the Memmap of WS433-CO2 sheet to configure the sensor's operating parameters
accordingly.
Typical sensor parameters:
Function
Code
(Read)
Function
Code
(Write)
# of
register
Byte Size
Description
Value
Range
Default
Format
Property
Explanation
4
1
2
%Battery
of sensor
Node
10,30,60,99
uint16
Read
Battery
level, only
04 levels:
10%, 30%,
60% and
99% (full).
When 10%
==> Need
to replace
the battery
4
2
4
CO2 value
of sensor
Node
400..40000
ppm
float
Read
CO2 value
from
Wireless
sensor
4
1
2
Status
bytes of
sensor
Node
uint16
Read
Hi-Byte is
error code,
Lo-Byte is
sensor type
4
2
4
Humidity
value of
sensor
Node
0..100%RH
float
Read
Humidity
value from
Wireless
CO2 sensor
4
2
4
Temperature
value of
sensor
Node
-40..+70°C
float
Read
Temperature
value of
sensor
Node
3
1
2
Data status
of Node
0-9, 99
byte
Read
0-9:
Interval
updated
data
99:
Disconnected
3
1
2
RF Signal
strength of
Node
0-4
byte
Read
From 0 to 4
with 0 is
being lost
connection
RF and 4 is
the
strongest
RF
Memmap resgisters
You can download Modbus Memmap of WS433-CL with the following link:
https://filerun.daviteq.com/wl/?id=BKEaUzdArkoc0Hc7nfpRShdPVToVrqQZ
The reference memmap addresses are based on the order of the sensors added in the Memmap file
above

3
16
1
2
Cycle_wakeup
1-3600(s)
120
uint16
Read/Write
Every time
interval of
Cycle_wakeup,
sensor node
would ONLY
send data
to co-
ordinator if
the new
measured
value was
changed
more than
the Delta
value of the
last
measured
value.
Default
Cycle_wakeup
is 120
seconds
3
16
1
2
Cycle_healthsta
60-7200(s)
600
uint16
Read/Write
Every time
interval of
Cycle_healthsta,
sensor node
will
absolutely
send data
to co-
ordinator
regardless
any
condition
(Recommended
: 900
seconds)
3
16
2
4
Radio
frequency
433.05-
434.79, 433
Mhz
433.92
float
Read/Write
Configure
the
operating
frequency
of wireless
sensor by
Co-
ordinator,
should be
configured
from
433.05-
434.79
MHz, only
for
advanced
users
3
16
2
4
a1
1
float
Read/Write
Scale value
of
parameter_1
= (a1 * Raw
sensor
value of
parameter_1)
+ b1. For
sensor
value scale
3
16
2
4
b1
0
float
Read/Write
Scale value
of
parameter_1
= (a1 * Raw
sensor
value of
parameter_1)
+ b1. For
sensor
value scale
Hi-Byte is error code
Error code
Description
0
No error
4.5 Status bytes of sensor Node

1
Just exchange the sensor module but node has not been reset ==>
please take out the battery for 20s then install it again to reset node to
recognize the new sensor module
2
Error, sensor port shorted to GND
3
Error, sensor port shorted to Vcc
4
Error, sensor port shorted each other
Lo-Byte is sensor type
Error code
Description
0
No error
1
Just exchange the sensor module but node has not been reset ==>
please take out the battery for 20s then install it again to reset node to
recognize the new sensor module
2
Error, sensor port shorted to GND
3
Error, sensor port shorted to Vcc
4
Error, sensor port shorted each other
We can estimate the battery life with the following conditions:
Cycle_healthsta
Estimated battery life
900 second (15 minutes)
2.89 year
600 second (10 minutes)
2 year
300 second (5 minutes)
1 year
Wireless sensor utilize the ultra-low power 433Mhz RF signal to transmit/receive data with Wireless co-ordinator.
To maximize the distance of transmission, the ideal condition is Line-of-sight (LOS) between the Wireless sensor and
Gateway. In real life, there may be no LOS condition. However, the two modules still communicate each other, but the
distance will be reduced significantly.
5. Battery Life Estimation
Battery capacity of 2 x 1.5VDC : 3000mAh
Battery performance: 90%
Data rate: 50kbps
Temperature: 25℃
6. Installation
6.1 Installation location
ATTENTION:
DO NOT cover the Wireless sensor or its antenna inside a completed metallic box or housing, because the RF
signal can not pass through the metallic material.

NOTE:
Integrated WS433-CL / iConnector Coordinator The coordinator must be placed at least 4 meters above the
ground and the sensor clearly visible.
6.2 Dimensions
6.2 Antenna Installation

6.3 Bracket mounting
6.4 Filter
WARNINGS:
Please make sure that the operating ambient temperature is right for the sensor.

Steps for battery installation:
Step 1: Using L hex key to unscrew M4 screws at the side of the housing and carefully pull out the top plastic housing
in the vertical direction
Prepare the professional tools for installation. The inappropriate tools may cause damage to
the sensor.
Please avoid contaminating the sensor's filter to ensure accurate measurement
6.4 Battery installation

Step 2: Insert 02 x AA 1.5VDC battery, please take note the poles of the battery
Step 3: Insert the top plastic housing and locking by L hex key
ATTENTION:
REVERSED POLARITY OF BATTERIES IN 10 SECONDS CAN DAMAGE THE SENSOR CIRCUIT !
ATTENTION:
When reinstalling the cover, pay attention to put the PCB edge into the middle slot of the box inside as shown
below)

No.
Phenomena
Reason
Solutions
1
The status LED of wireless sensor
doesn't light up
No power supply
Configuration function of
the LED is not correct
Check that the battery is
empty or not installed
correctly
Reconfigure the led light
function exactly as
instructed
2
Wireless sensor not connected to
co-ordinator
No power supply
The configuration function
of the RF data rate is
incorrect
Check that the battery is
empty or not installed
correctly
Reconfigure the RF data
rate with the button
according to the
instructions
Manufacturer
Daviteq Technologies Inc
No.11 Street 2G, Nam Hung Vuong Res., An Lac Ward, Binh Tan Dist., Ho
Chi Minh City, Vietnam.
Tel: [phone] (ext.122)
Email: [e-mail] | www.daviteq.com
Distributor in Australia and New Zealand
Templogger Pty Ltd
Tel: 1800 LOGGER
Email: [e-mail]
7. Troubleshooting
8. Support contacts

Revision #12
Created Wed, Jun 2, 2021 4:45 AM by Kiệt Anh Nguyễn
Updated Fri, Jun 25, 2021 2:48 AM by Kiệt Anh Nguyễn