Ventil'O sensor

 

Declaration of conformity

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You can download certificates from our watteco website download center in the "RED Directives" section

Presentation

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The Ventil’O sensor is a LoRaWAN class A sensor that uses a disposable 3.6V A-type battery as power supply and includes an internal antenna.

Ventil’O is designed to monitor differential pressure level on ventilation and air-conditioning installations. Using the S0 input (only for 50-70-166), it can be linked to an alarm output to report alarms from the equipment where it is installed.

Ventil'O reports all events (state change, count) on its S0 input.

Family Code / Release Note

Release note:

• 50-70-101-005 / 50-70-166-002 (S0 version) : New Sensirion pressure sensor and PCBA coating
• 50-70-101-004: only 1 hose, goretex
• 50-70-101-003: new casing, leds IHM, battery holder
• 50-70-101-002: buzzer IHM

LoRaWAN release

v1.0.2 Region Parameter rev B

Electronic input

The schematic of the S0 input of the Ventil'O sensor is illustrated below:

Signal output

NPN Open Collector output

Dry Contact Output

Casing

Flammability rating: UL94V0
Ingress protection: IP65

Installation and operation

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Installation

The Quick Start and installation preconisation is available on watteco website download center.

Adding to this installation, it could be interesting to have this manual tester : KIMO, to help to know if your installation is well done.

Radio propagation

In order for the sensor to operate correctly, the number of obstacles should be limited in order to avoid excessive radio wave attenuation.

Autonomy

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The information in the table below represents how long the battery can last. It is based on the default configuration at ambient temperature (+25°C) within the optimal operating range of the sensor via a LoRaWAN network (one uplink frame), when the spreading factor used is SF12.

The disposable battery has a 3.6Ah capacity, of which 85% is used.

Transmission periodicity	Battery life
4 frames each day (default configuration with 1 measure every 15 minutes, batch sent every 6 hours)	>10 years

Human Machine Interface

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Video tutorials are available to interact with the device: Video Tutorials Watteco website

or on out youtube channel: Watteco Youtube channel

The Ventil’O sensor has a buzzer that allows it to “communicate” with the user.

A reed switch is available under the "ILS" sticker. It is possible to use a magnet to activate it and makes specific actions on the sensor (Switch off, switch on, Re-associtation…). When the reed switch is activated, the buzzer rings quickly.

To Start-up the device, it is necessary to put a magnet on the  side of the sensor during one second (on the opposite side of the cable glands). The buzzer rings quickly during this step. After this second, the buzzer stops and rings slowly until the association is done.

To switch off the device, use the same way by putting the magnet during 5 seconds. After this amount of time, the device rings 5 times slowly.

The table below describes the actions to be performed on the reed switch to disable or enable the storage mode.

Action	Magnet	Buzzer
Switch ON (disable storage mode)	1 second
Switch OFF (enable storage mode)	5 seconds

When the sensor is trying to associate with a network, it emits the following sound:

Once the association is completed, the buzzer makes the following sound:

A reed switch (or magnetic switch) is available. A magnet can be used to activate it and perform specific actions on the sensor (switch off, switch on, reassociation…).

• Configuration: "void" frames are sent every minute for 10 minutes.

Standard reports are disabled in this mode.

Configuration mode
Way to trigger it	One passage of the magnet near the reed switch or specific ZCL command
Way to stop it	Another passage of the magnet or specific ZCL command
Effects on the sensor
Duration	The configuration mode lasts 10 minutes

• A reassociation procedure can be requested if no downlink frame is received by the sensor during a given periodicity (4 days by default) or if a given number (100 by default) is reached or in case of failure (no acknowledgement received) by sending an applicative frame to the sensor or via the sensor’s IHM.

The sensor keeps the AppEUi and DevAddr configured, Confirmed/Unconfirmed configuration and all applicative configurations. However, LoRaWAN configurations (channel, data rate…) are lost

ReAssociation Mode
Way to trigger it	Three passages of the magnet near the reed switch or ZCL command from LoRaWAN cluster.
Effects on the sensor

• A factory reset is available on Watteco’s sensors. It deletes all the applicative settings saved in the flash memory (i.e. configured batches and reports will be deleted).

The sensor keeps the AppEUi and DevAddr configured. However, LoRaWAN configurations (channel, data rate…) and applicative configurations are lost.

Factory reset
Way to trigger it	Two quick passages and a very long passage (until the sensor rings for the reset) of the magnet near the reed switch
Effects on the sensor

Applicative layer

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Codecs are available to decode frames: Downloads

or Online codec

The Ventil'O device implements "Differential pressure", "Temperature" and “Binary Input” (only for S0 version) cluster associated to its Inputs.

Ventil'O  integrates the following clusters:

Cluster	End Point	Cluster name	Managed attributes
0x0000	EP0	Basic	All
0x0050	EP0	Configuration	All
0x8004	EP0	LoRaWAN	All
0x8008	EP0	Differential pressure measurement	All
0x0402	EP0	Temperature measurement	All
0x000F	EP0	Binary input (S0 input)	All

Default configuration

Values transmitted by the Ventil'O device are the mean differential pressure since last value in Pa [1], the minimal differential pressure since last value in Pa [2], the maximal differential pressure since last value in Pa [3], the current battery voltage in mV [4], the S0 input state [5] (only for 50-70-166 version), the current value of the differential pressure in Pa [6], the battery voltage below/above the defined threshold [7]

The sensor transmits a Batch frame every 6 hours containing [1], [2] and [3].

Once a week, the transmitted Batch frame contains also [4] in addition. If the threshold of the battery voltage is reached, the 6-hours transmitted Batch frame will also contain [7].

If the Thresholds defined for the differential pressure are crossed, then an alarm is sent containing [6].

The first Batch frame is sent 6 hours after the sensor successfully paired with a network. When the sensor executes a measurement, if a threshold is reached, then a ZCL-like threshold report is immediately transmitted.

To change the default configuration, see the Frame examples section (e.g. to change the measurement period, follow the "Modify the default measurement period for the differential pressure" example)

Differential pressure

The Ventil'O will make a measurement of the pressure every 15min, with a batch report including the mean, minimum and maximum pressure value every 6 hours.

Two pressure threshold are defined, which will trigger an alarm (not confirmed). If a threshold is crossed, the device will make 3 consecutive measurement, each separated by 1s, to confirm that the threshold is crossed. An alarm will then be sent if the measured pressure goes over/under 90Pa or if the pressure goes over/under 400Pa.

Binary input (only for 50-70-166 version)

Standard report (not confirmed) set for binary input on state change with 80ms debounce on the S0 input.
Batch report (not confirmed) for state change counter on fall (1 to 0), sent every 24h.

Temperature

No report is configured for the temperature cluster.

Node power descriptor

The device will measure the battery voltage every 10 minutes.
A batch record will be added to the next batch sent every 6 hours (sent as confirmed) if the voltage drops below 2.9V over the 6 hours period.
The battery value is also sent every 7 days in a batch report (confirmed frame)

Every change made to the default configuration must comply with the legal duty cycle (for example, the most restrictive in the EU is 0.1%, which corresponds to approximately 1 frame per hour with SF12)

Frame examples

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All frames have to be sent on port 125

Standard report

Report

Report of the differential pressure

 

Report of the temperature

 

Threshold alarm

Alarm sent on the differential pressure measure

 

Configuration

Modify the default measurement period for the differential pressure

  

Configure a report based on a threshold on the temperature

  

Configure the debounce period on the S0 input, no response confirmation from the device

 

Batch report

Configuration

• Configure a batch report on pressure value:

Pressure value read and timestamp and record every 30 minutes. A report has to be sent at least every 3 hours:

Applicative payload of the batch report on pressure value

  

User guide

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Notice Installateur FR

Ventil'O_user_guide

Video Tutorials - WATTECO

Known Issues

• Measurement period configuration:
  • Setting the "Measurement period" to a value lower than ("Nb of mesurement sample" + "Nb of confirmation samples") * "Sampling period" (ie: (1 + 3) *1000 = 4000ms), will lead to a broken configuration.
    The best palliative is to set back the sensor its "Factory reset" configuration then set correctly the required "Measurement period" with more than 4000ms.
    Another solution is to correctly set the four dependant values with such serie of frames (here default configuration):
    1. Number of measurement samples (1) : 11 05 80 08 00 04 21 00 01
    2. Number of confirmation samples (3) : 11 05 80 08 00 05 21 00 03
    3. Sampling period (1000ms) : 11 05 80 08 00 06 23 00 00 03 E8
       ==> Giving a minimal 4000ms "Measurement period"
    4. Measuremnt period (15mn = 900000ms) : 0B 11 05 80 08 00 03 23 00 0D BB A0

• Using FOTA configuration:
  • If Measurement configuration (1,2,3,4) is not set in a new FOTA configuration the parameters will be unset and erroneous (not initialised).
    Consequently do not forget these parameters (1,2,3,4) if you create a new Factory reset configuration through FOTA.