GENERAL GUIDE FOR WIRELESS SENSOR WS433 WITH SMALL HOUSING

This document is applied for the following products

1. Functions Change Log

2. Introduction

WS433- is a Sub-GHZ wireless sensor module utilizes the Sub-GHz technology from Texas Instruments, USA. This wireless module can be connected to many kind of digital sensor modules. Please refer to the table as above. This wireless module will automatically recognize the sensor module once plugged in. It will be configured the working parameters remotely by ModbusRTU master software or via Globiots platform. This wireless module is ultra-low power design which can last up to 10 year with a single AA battery.

3. Specification

4. Typical Product Pictures

5. Operation principle

5.1 Memmap resgisters

You can download Modbus Memmap of WR433 with the following link:

https://filerun.daviteq.com/wl/?id=BKEaUzdArkoc0Hc7nfpRShdPVToVrqQZ 

5.2 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.

For example, the measurement time is 200mS, after this time, the node will read the value of sensor using I2C, node will switch OFF power supply to external sensor to save energy.

Once reading the sensor value, the raw data is X, it can be scaled to any engineering value by the following formula:

Y = aX + b

Where

X: the raw value from 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.

Status bytes of sensor Node

• Hi-Byte is error code

• Lo-Byte is sensor type

Logic status of parameters

• Hi-Byte is Logic status of parameter 1
  • If parameter 1's value > high threshold 1 => Hi-Byte of Logic status = 1
  • If parameter 1's value < low threshold 1 => Hi-Byte of Logic status = 0
  • If parameter 1 is digital => Hi-Byte of Logic status = parameter 1's value
  • Timer up 1 = (Total time when Hi-Byte of Logic status = 1)
  • Timer down 1 = (Total time when Hi-Byte of Logic status = 0)
  • RisingEdge counter 1 = (Counter value when Hi-Byte of Logic status changes from 0 to 1)
  • FallingEdge counter 1 = (Counter value when Hi-Byte of Logic status changes from 1 to 0)

• Lo-Byte is Logic status of parameter 2
  • If parameter 2's value > high threshold 2 => Lo-Byte of Logic status = 1
  • If parameter 2's value < low threshold 2 => Lo-Byte of Logic status = 0
  • If parameter 2 is digital => Lo-Byte of Logic status = parameter 2's value
  • Timer up 2 = (Total time when Lo-Byte of Logic status = 1)
  • Timer down 2 = (Total time when Lo-Byte of Logic status = 0)
  • RisingEdge counter 2 = (Counter value when Lo-Byte of Logic status changes from 0 to 1)
  • FallingEdge counter 2 = (Counter value when Lo-Byte of Logic status changes from 1 to 0)

This wireless module can connect with many kinds of measurement sensor, such as temperature, humidity, pressure, level, flow, RTD input, Thermoucouples input...It automatically detects the attached measurement sensor.

5.3 List of sensor modules used for WS433-M12F :

Ambient Temperature Sensor Module (ATE)

• Feature measuring ambient temperature:
  • Measure the ambient temperature, module type IP67
  • Measuring range -20 .. + 85 oC
  • Accuracy ±0.5oC
  • Resolution 0.125oC

Ambient Temperature Sensor Module (ATH)

• Feature of measuring humidity in environment:
  • Humidity measuring range & accuracy: 0 .. 100 %RH, +/- 2.0%
  • Resolution ±0.1%
  • Long-term Drift ±0.25%RH/year
• Feature measuring ambient temperature:
  • Temperature Range -40oC to +125oC
  • Accuracy ±0.4oC
  • Resolution ±0.1oC

Environment differential pressure sensor (ADP)

• Features of measuring environment differential pressure:
  • Measurement Range -125Pa to +125Pa
  • Accuracy 3% of reading
  • Resolution 0.5% of reading
• Feature measuring ambient temperature:
  • Temperature Range -40oC to +85oC
  • Accuracy 2oC
  • Resolution 0.1oC

Process pressure sensor (PPS)

• Pressure measuring feature:
  • Pressure Range 0% - 100%
  • Accuracy ±0.5% of span
  • Resolution 0.008% of span
  • Long term stability ±0.3% Span/Year
• Feature measuring ambient temperature:
  • Temperature Range -10oC to 80oC
  • Accuracy ±1.5oC
  • Resolution 0.1oC

WS433 also applies to measurement and control: Digital Input, AC current,....

5.4 Add sensors node to Co-ordinator WS433-CL

5.4.1 Add Sensor Node ID automatically

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.

If you do not hear the "Peep" sound, please disconnect the power the co-ordinator, wait a few minute and try again.

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-FW), 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.

Memmap resgisters

You can download Modbus Memmap of WS433-CL with the following link:

https://filerun.daviteq.com/wl/?id=BKEaUzdArkoc0Hc7nfpRShdPVToVrqQZ 

5.4.2 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:

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

5.5 Button Function

• Step 1: Using Philips screw driver to unscrew M2 screw at the side of housing and carefully pull out the top plastic housing in the vertical direction.
• Step 2: Press the button until you see LED flashes 3 times to reset

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.

Reset default WS433:

• Frequency: 433.92 MHz
• RF transmit power: 15 dBm
• RF data rate: 50 kbps

6. Installation

6.1 Mounting bracket installation

Locate the place where the wireless sensor is mounted, from that locate the position to mount the bracket;

Placing the wireless module on bracket and secure it by 02 x M2 screws (supplied in accessory bag)

Note: The bracket can be mounted on the wireless module in both direction, upward or downward

The mounting bracket is made from hard metallic material. The following steps are for mounting this bracket;

6.2 Installation location

The bracket will be fixed on the wall or material with a flat surface with double-sided 3M tape (included in the accessory bag in a carton box) or 2 x M4 screws (supplied by the customer);

When using 3M double sided tape, please install the sensor at a height of 2 meters or less.

ATTENTION:

DO NOT install the Wireless sensor or its antenna inside a completed metallic box or housing, because the RF signal can not pass through the metallic wall. The housing is made from Non-metallic materials like plastic, glass, wood, leather, concrete, cement…is acceptable.

6.3 IO Wiring & Sensor installation

The sensor module has M12-male connector which is matched with M12-female connector on wireless module;

Carefully plug the sensor module onto wireless module, using HAND to tighten slowly until stop;

ATTENTION:

Please DO NOT over tightening by hand or other tool, it can damages the M12 connector;

6.4 Power Supply & Battery installation

Steps for battery installation:

NOTE: Because of O-ring, it requires to have much pulling force at the beginning, therefore please do it carefully to avoid the damage of circuit board which is very thin (1.00mm);

7. Troubleshooting

8. Support contacts