DST ObservAir Manual de instrucciones - Página 13

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Command (cmd)

Value (val)

$setID

0 to 1000

$setFR$val

30 to 200

$setSamplePeriod$val

2 to 60

$setTimeZone$val

-12 to 12

$syncTime$

N/A

$setTime$YYYY,MM,

date/time

DD,HH,MM,SS

$deviceInfo$

N/A

$setMaxATN$val

10 to 150

$ATNreset$

BC, GAS1,

$setLEDmode$val

GAS2,

ALERT, OFF

$setLEDmaxConc$val

0.2 to 50

$setLEDra$val

60 to 3600

$setLEDtimeout$val

0 to 60

$setDLPF$ val

0 / 1

$setEnvComp$val

0 / 1

$setLTE$val

0/1

$setGPS$val

0 / 1

$setGPSsample

2 to 60

Period$val

$setGasSignals$val

0 / 1

$setSaveData$val

0 / 1

$setMAC$val

9.0 to 15

$setFRcal$val

0.8 to 1.2

Table 7. ObservAir serial commands and descriptions

ObservAir Operating Manual

Function

Set sensor ID

Set sample flow rate in ccm

Set measurement period in seconds

Set time zone in hours from GMT

Sync time with internet server (Time

zone must be set)

Manually set clock to specified

date/time

Returns all sensor settings

Set the maximum attenuation (ATN)

value, above which alarm is triggered

Reset the attenuation (ATN) to 0

Set the LED to pollutant concentration

display, alerts only, or turn off

Set maximum concentration displayed

by LED button (red)

Set running average size (in seconds)

for the LED concentration display

LED display timeout duration in

minutes. 0 = LED on indefinitely.

Toggle the DLP filter applied to the

pollutant concentration data

Toggle DST environmental

compensation algorithms

Toggle LTE enable

Toggle GPS logging

Set the GPS update period in seconds

Toggle logging of gas sensor(s) signals

Toggle data logging (0 = no data is

being saved to SD card)

Set mass absorption coefficient (MAC)

Set flow rate calibration coefficient

3.7. WiFi connection

Provisioning WiFi credentials to the ObservAir allows the sensor to

automatically sync time, receive over the air (OTA) firmware updates and

technical support. In the future, cloud-based services and a mobile app will

also be available over the WiFi connections. Follow the instructions below

to provision WiFi credentials:

1. Cycle through the interactive LED button menu until the LED flashes

blue twice (provisioning mode).

2. The sensor will restart into provisioning mode, and slowly glow on and

off ('breathe') in a blue color to indicate that it is ready and

broadcasting a WiFi network.

3. From a computer or mobile device, log onto the "Our Product" WiFi

network.

4. A captive portal (Figure 13) will appear requesting your WiFi network's

SSID and password. The ObservAir is only compatible with 2.4 GHz WiFi

networks.

5. Once credentials are submitted, the ObservAir will restart and begin

logging air quality measurements as usual.

Figure 13. Screenshot of the ObservAir's captive portal, as viewed from a

mobile device. Enter you WiFi network's credentials and press submit.

When WiFi credentials are provisioned, the sensor will be able to

automatically connect to the network and sync the internal clock time if a

timestamp error is detected while logging. During normal operation, the

WiFi module remains powered off. WiFi is only enabled during over-the-air

(OTA) firmware updates and technical support. WiFi credentials must be

provisioned using the instructions provided here prior to initiating any OTA

software features.

ObservAir

Operating Manual