During the workshop we will deploy a couple of WSN to measure environmental parameters. For each site, we need to plan the installation.

1) Air-quality monitoring (indoor and outdoor)

• how many nodes: 3
• what is each node going to measure: General Air Quality, or optionally specific gases
• what sensors (type and model):
  • TGS family - suggested: TGS 2600 ​http://www.figarosensor.com/products/2600pdf.pdf
    • full list at: ​http://www.figarosensor.com/gaslist.html or
  • Grove Air Quality (meant for indoors air quality measurement - sensitive to formaldehyde, benzene, toluene and other volatile components)
• where will they be installed: STUDENTS RESIDENCES, indoor and maybe outdoors, close to window, on roof, or so
• will power be available: YES
• how often will we measure data: EVERY HOUR
• what kind of connectivity is available: WIFI
• will the nodes be in a safe place: YES

2) Water quality

• how many nodes: 1
• what is each node going to measure: it would be nice to do pH, water temperature, Conductivity, TDS, Oxygen
• what sensors (type and model): depending on budget available - one or several of ​https://www.atlas-scientific.com/probes.html?
  • temperature: ​https://www.sparkfun.com/products/11050
• where will they be installed: pool
• will power be available: NO - which means we have to add a stronger panel/battery for this one
• how often will we measure data: EVERY HOUR
• what kind of connectivity is available: 2G
• will the nodes be in a safe place: YES

Sensors for Water node in order of Salin's preference:

Property	Sensor	Power consumption	Output	Comments	Price
Dissolved oxygen	​https://www.atlas-scientific.com/product_pages/probes/do_probe.html?	..	voltage from 0mv to 47mv depending on the oxygen saturation	needs BNC shield? better without?	$200
pH	​https://www.atlas-scientific.com/product_pages/probes/ph_probe.html?	...	current ~ pH hydrogen activity	needs BNC shield? better without?	$72
Ammonia	​http://www.vernier.com/products/sensors/ion-selective-electrodes/nh4-bta/	---	-		ß229
Nitrite	? none known	none?	-		-
Alkalinity	? none known	none?	-		-
Nitrate	​http://www.vernier.com/products/sensors/ion-selective-electrodes/no3-bta/ ?	---	-		$229
temperature, alt	​https://www.atlas-scientific.com/product_pages/probes/env-tmp.html?	<50 uW	...	better than sparkfuns	$22

Dimensioning power supply for Water node

Preferred solution: bigger external panel and battery:

10W/20W panel 12 V - to be bought in thailand

7.2 Ah battery - to be bought in thailand

DCDC converter

charge controller - http://www.morningstarcorp.com/products/sunguard/ - Jon brings

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If we are using the stalkers' onboard controller:

Q: how much charge current can the stalker board handle?

CN3063 chip used on stalker
http://www.consonance-elec.com/pdf/datasheet/DSE-CN3063.pdf

BAT max 600 mA at 5 V
VIN max 950 mA at 5 V

==> max. size for solar panel:

5 W

==>

Solar Panel:

3W http://www.seeedstudio.com/depot/3W-Solar-Panel-138X160-p-954.html
or 
5W $45 https://www.sparkfun.com/products/9241

fat battery, 6 Ah, $30
https://www.sparkfun.com/products/8484

charge time in full sun:
9 / 6 hours

autonomy:
1 W = 0.2 A at 5 V
3 Ah available ==>
15 h / Watt consumed

3) Soil

• how many nodes: 1 ?
• what is each node going to measure: soil moisture, external temperature, humidity, pressure, light
• what sensors (type and model): grove soil moisture, grove temperature, grove humidity, grove pressure, grove light
• where will they be installed:
• will power be available: NO - we may have to add a stronger panel/battery for this one
• how often will we measure data: EVERY HOUR
• what kind of connectivity is available: 2G
• will the nodes be in a safe place: YES

What we might/will need along the way (and expect to be able to source on location)

• wire
• screw terminals
• resistors
• caps
• shrink tube
• silicon

The goal of these deployments is to …

1) Analyze the performance of the system in terms of battery consumption, reliability of data transmission and cost of operation.

2) Showcase the use of WSN for environmental monitoring.

3) Foster the interest in WSN research at AIT.

4) Assist in the installation of an open source middleware solution to gather data from these and future deployments.

5) Disseminate the results of the deployments in a scientific publication.