Flash'O sensor

 

Declaration of conformity

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Download the declaration of conformity

Presentation

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Flash'O is a LoRaWAN class A sensor. It is a meter radio interface that transmits the cumulated flash LED values from any pulse meters: water, gas, electricity, energy. The sensor is connected to 1 optical probe or 3 optical probes that recovers light pulses.

The Flash'O sensor is powered by a disposable 3.6V A-type battery. It incorporates one or three digital input, and also includes an internal antenna.

The level or a counter can be transferred to the input. It is also possible to get the voltage of the power supply.

 

Compatibility notice between ENEDIS meters and TIC or Flash’'O sensors (in French)

Family code

The family code of Flash'O devices is: 50-70-071-(007 and upper)

50-70-071-007: modify input 2 and input 3 with different sensibilities to work with Sagem C3500, Landis Gyr L19C1 and Actaris QE16M. (see work around for details)

The family code of Flash'O 3 probes devices is: 50-70-206

For previous release,  see older revision documentation

 

LoRaWAN release

v1.0.2 Region Parameter rev B

 

Installation and operation

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Installation

The housing is intended to be installed inside or outside a building but it must be protected from vertical water spray and direct sunlight.

The optical probe is easily attached using either magnets or velcro strips. The cable length is approximately 0.5m.

 

For 3 probes devices, each one is repered by a number:

 

The housing is compatible with the following DIN rail adapter:

 

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. It is also important to place the sensor as high as possible. The cable gland should be positioned downward.

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
1 frame/ 24 hours	+15 years

Human Machine Interface

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Video Tutorials - WATTECO

There are three LEDs on the Flash'O device:

ASSN:      blinking until the association with a network is done. Since release v3.5.2.5530, after 6 hours in association searching the led blinks all 1 minute.

FNC:     blinks for each activated input (in the limit of one blink each 250ms) during first two minutes after startup, after it blinks every minute if an input is activated.during the passed minute. Blinks in configuration mode for each activated input.

CNF:     blinking in configuration mode.

To start up the device, a magnet must be placed next to the sensor for one second (to the left of the cable gland). The red LED blinks quickly during this step. After one second, the red LED stops blinking and the green LED blinks slowly until the association is done.

To switch off the device, repeat the same operation by placing the magnet next to the sensor for 5 seconds. After those 5 seconds, the red LED blinks 5 times slowly.

A reed switch is available under the sticker. A magnet can be used to activate it and perform specific actions on the sensor (switch off, switch on, reassociation…). When the reed switch is activated, the red LED blinks quickly.

• Configuration

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	The CONF led (red) blinks (3 sec. OFF, 3 sec. ON) and the sensor sends an uplink frame every minute.
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	The ASSN led (green) blinks as the “no commissioned sensor” LED is lit.

• 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 long passage of the magnet near the reed switch
Effects on the sensor	The CONF LED (red) and ASSN LED (green) blink at the same time briefly. All the applicative settings (for batches and reports) are deleted. The blinking is illustrated below this table.

Applicative layer

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Codecs are available to decode frames: Downloads

Flash'O incorporates the following clusters:

Cluster	Cluster name	Managed attributes
0x0000	Basic	All
0x0050	Configuration	All
0x8004	LoRaWAN	All
0x000F	Binary Input	All

Default configuration

A default configuration is set for the one probe:

• The device reports each day the counter value associated with input 1+/1- (EndPoint 0 / Cluster Binary Input / Attribute Count).

A default configuration is set for the three probes:

• The device reports each day the counter value associated with input 1+/1- (EndPoint 0 / Cluster Binary Input / Attribute Count), input 2+/2- (EndPoint 1 / Cluster Binary Input / Attribute Count), input 3+/3- (EndPoint 2 / Cluster Binary Input / Attribute Count)

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 present value of connector input 1+/1-

 

Configuration

 

Configure a standard report on connector input 1+/1-

 

Batch report

Configuration

 

• Configure a batch report on Flash'O 1 probe, on binary input counter of connector 1+/1- and voltage battery:

Timestamp and record the pulses counter with a resolution of 1, a value has to be saved at least every 30 minutes or on a rise of 50 pulses. Timestamp and record the battery voltage with a resolution of 0.1V, a value has to be saved at least every 24 hours. All data have to be concatenated and sent every 24 hours at the most.

→The solution to concatenate several different physical values in the same frame is to use batch reporting.

For the batch, the number of physical measurements that will be sent must be known in order to choose a label for each of them and the size of these labels.

As mentioned in the previous paragraph, we will have only two kinds of measurements to manage, thus two different labels. The tag size to be used for two labels is 1. Label 0 can be used for binary input counter and label 1 for the disposable battery level.

Two frames must be sent to configure this batch.

Label number	Tag label	Tag size
1 or 2	0/1	1
3 or 4	00/01/11/10	2
5 or 6 or 7 or 8	000/001/010/011/100/101/110/111	3
...	...	...

A counter on Input 1+/1- is the End Point 0, Cluster “Binary Input” is 0x000F, and Attribute “Count” is 0x0402.

The battery voltage: Cluster "Configuration" is 0x0050, and attribute "Node power descriptor" is 0x0006.

Applicative payload of the count on input 1+/1-

 

Applicative payload of the battery voltage

 

To decode the batch reception, use br_uncompress. Type for binary input counter is U32 (10) and U16 (6) for the disposable battery power, so the following command must be used:

echo "26150020e06001d71e0000a0650f" | ./br_uncompress -a 1 0,1,10 1,100,6

Result:
DECOMPRESSION SERIES

cnt: 5   #  Batch counter (from 0 to 7)

263    # Timestamp in seconds of sending of the frame

#Format of data is: Timestamp of Measurement | Label | Value

263 0 45     # Timestamp: 841 s                                   Label 0: counter pulse                          Value: 45

263 1 3000     # Timestamp: 811 s                                Label 1: Disposable battery                 Value: 3.0V

Known Issues

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• Binary Input batch:
  • Version: V3.5.2.5358.5408, V3.5.2.5466.0, V3.5.2.5466.5514
  • Issue: Counting Indexes are always to 0 in batch report.
  • Workaround: Set a standard report on each input on which a counting is necessary:
    • Input 1: 1106000f000402230000fffe00000000 => send a standard report all the 22 days
    • Input 2: 3106000f000402230000fffe00000000 => send a standard report all the 22 days
    • Input 3: 5106000f000402230000fffe00000000 => send a standard report all the 22 days
• Incorrect counting:
  • Version: 50-70-071-007
  • Issue: The product has difficulty to read the led of different meters.
  • Workaround: 
    • Sagem C3500: put the probe on the input 2 and set the report on this specific input.
    • Landis Gyr L19C1: put the probe on the input 2 and set the report on this specific input.
    • Actaris QE16M: put the probe on the input 3 and set the report on this specific input.

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