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.