DigI:TI1.2

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T1.2 Pilot installation Kjeller

Task Title Pilot installation Kjeller
WP DigI:WP-I1
Lead partner Basic Internet Foundation
Leader Josef.Noll
Contributors BasicInternet
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Objective

This task will establish the Pilot installation in Africa

  • solar-cell driven Wifi access point
  • link to "tower" containing local content
  • installation report
Category:Task


Deliverables in T1.2 Pilot installation Kjeller

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Expected outcome

Year 1:

  • Pilot installation (M06)
  • Suggestion for installation (M08)


Pilot installation at Kjeller

The pilot installation at Kjeller is the integration test for WP-T1 Specs Tanzania and WP-C1 Specs Congo. Example of the Health Spot information is given at http://digi.futurecompetence.net/

Infrastructure

The pilot at Kjeller involves the equipment at the health spot and the communication equipment at the tower. 90 deg sector antenna for Wifi distribution

Health spot installations

Health Spot at Kjeller - with good help from Øyvind and Maghsoud
  • 1 IBC Solar module SoloSol 100 CS 100W
  • 1 Regulator m/display SC-D10A/1224
  • 1 Battery 12V 22AH (Biltema - 649 NOK)
  • Cables and connectors (Clas Ohlson 36-3902- 69 NOK)
  • USB connector (Clas Ohlson 38-7050 349 NOK )
  • 1 LED lamp 5W
  • (not used: PoE injector, ~90 NOK)
  • Receive antenna with local beam (Witelcom)

The update was necessary as the previously used controller had a two small hysteresis, ending up in a "jitter" on the power on/off, which turned down the hot-spot. After having updated to the bigger installation, we received stable conditions.
Earlier installation:

  • 2 Solar panels (53 x 35 cm each, max 6W (350 mA max), Biltema 31631= 2 x 389 NOK)
  • 1 controller (Biltema 31635 - 189 NOK)
  • 1 Battery 12V 18AH (Biltema 80413 - 499 NOK)

The total costs are 1900 NOK, roughly 210 € (+Witelcom receive antenna + construction work)

  • Light: (LED-spotlight? 36-5024 199 kr) - or Campinglampe 24955 89,90 kr)
  • needed: splitter for 2 solar panels

Tower installation

InfoInternet network infrastructure for Digital Health Spot

  • Mikrotik box (RB960PGS-PB [1] or others) -
    • function: connect to village server, divide traffic between free/local, InfoInternet and Voucher traffic
    • alternatively: install RB on village server, and perform "soft routing"
    • power consumption: 9 W, with PoE
  • 90deg sector antenna, 20 W(?)
  • backend connectivity
  • Village server
    • as USB dongle(?)
    • as ownstanding server (?)

Communication equipment

  • 90 deg sector antenna (Witelcom)
  • Mikrotik router board RG 1100Ah (ca 400 €) - alternative? - need to consider power consumption and the robustness. Other Mikrotik devices?
  • Alternative: RB960-PGS-PB, max 9W (but about 25% performance of RG 1100 AH)

Selection of Mikrotik devices

Comparing the RB1100AHx2 and the RB960PGS-PB (by Iñaki May2017). Aspects to consider

  • power consumption
  • the amount of traffic/users we want to cover on a specific area and
  • costs, considering CAPEX and OPEX.
  • I'm not considering whether the equipment needs to be indoor or outdoor.

When considering the amount of traffic/users, RB1100AHx2 model is the winner.

  • First, because of the license level, which in this case is 6 (the highest one) compared to license level 4 in case of RB960PGS-PB. In the following page there is a table comparing different license numbers: https://wiki.mikrotik.com/index.php?title=Manual:License#License_Levels
  • Second, because of the hardware capacity. RB1100AHx2 model is able to handle between 2 to 4 times more traffic than the RB960PGS-PB.
  • If we are thinking on a installation where the idea is to place a server with content such as videos... then I would go for a RB1100AHx2, otherwise the RB960PGS-PB is a good option.
  • Regarding the power consumption and outdoor enclosure the RB960PGS-PB (max 9W) model is more convenient than RB1100AHx2 (max. does not specify but have to be quite high due to the fans).
  • If the main driver is the energy consumption and/or cost, then definitely RB960PGS-PB model is the winner.

Server for both routing and content

see discussion on DigI_talk:TI1.2

Experiences from pilot installation

Charge indicator despite the light rain
  • The power consumption from the wireless link is roughly 200-250 mA
  • Each solar panels deliver in cloudy conditions roughly 110 mA
  • Thus, two panels delivering 220 mA (in cloudy conditions, even light rain) is sufficient for operation
  • Antenna pointing was not a problem, but we had a challenge in configurability

Witelcom connectivity

  • SW allowing for DHCP relaying (switch off local DHCP provision)
  • (failure (20May2017): reset into old SSID mode)
  • default administrator - can't change admin username

For more information, download the Video on Solar Cells for Communications

Alternativ suppliers

Solar Panel

Battery regulator: