UKHASnet Wiki

Brainstorming page for GSM Solar Gateways.

  * 5V 2W Solar Panel
    * Need to compare [[http://www.adafruit.com/product/200|Adafruit]] vs [[http://www.ebay.co.uk/itm/6V-330mA-Solar-Panel-Solar-Cell-2W-Watt-136mm-x-110mm-B-Grade-/221676283878?pt=UK_Gadgets&hash=item339cefa7e6|Ebay]]
  * MCP73871 MPP Charger - [[http://www.adafruit.com/datasheets/MCP73871.pdf|Datasheet]]
    * Needs to be configured for MPP of selected panel
    * Battery Temperature Monitoring should be fitted (mainly for low temperature concern)
  * LiPo Battery

  * ATMega328P
  * RFM69HW
  * SIM900

====== Objective ======

To Provide a Fit-And-Forget UKHASnet gateway for installation on remote structures.

===== Self Telemetry =====

  * Battery Voltage

maybe:

  * Battery Temperature with ds18b20 (so as not to accidentally interfere with the charger thermistor)

===== Physical =====

  * Waterproof box to be fitted to a vertical pole.
  * Solar panel slanted at 45 degrees towards the South (mounted on top?)
  * Internal GSM Antenna (chip or window-mount stuck to inside)
  * 868 MHz Dipole antenna out through large cable grommet on underside.
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