scottrcarlson/dsc-v4

DSCv3

[What is Dirt Simple Comms (DSC) ?]

[Goals]

1. To not require existing infrastructure
2. To operate well and propage messages in poor rf environments.
3. To securely exchange messages with friends in hostile rf environments.
4. To avoid central points of control in the system design.
5. To keep the attack surface as small as possible.
6. Make it easy to use and hard to mess up.
7. To leak as little data as possible.
8. Low Cost / Low Power / Long Range
9. Small Form Factor / Portable
10. Utilize LoRA Modulated 900mhz Radio System

[Bill of Materials]

(Work in Progress) (Prices can be optimized based on source and quantity) Total Estimated price $85-$120)

• $5 RPi Zero (Wherever you can get one)
• $13 DS3231 Precision RTC https://www.adafruit.com/product/3013
• $33 LL-RXR-27 LoRa Transceiver http://www.futureelectronics.com/en/Technologies/Product.aspx?ProductID=LLRXR27915SYMALINKLABS5062354&IM=0
• $23 OLED Bonnet https://www.digikey.com/products/en?mpart=3531&v=1528
• $3 SMA to u.Fl Adapter Cable https://www.amazon.com/2pcs-Female-Pigtail-Hirose-0-81mm/dp/B00UTT8842
• $13 Antenna 1/2 Wave 5dBi https://www.amazon.com/TECHTOO-700-2600Mhz-Directional-Connector-Wireless/dp/B00VV63WEI/ref=sr_1_1?ie=UTF8&qid=1502143910&sr=8-1&keywords=techtoo
• OR
• $7 Antenna 1/2 Wave 5dBi https://www.amazon.com/915Mhz-antenna-direction-folding-Shipping/dp/B072QB7LRJ/ref=sr_1_2?s=electronics&ie=UTF8&qid=1502143982&sr=1-2&keywords=900mhz+antenna+sma
• RGB Led (tbd)
• Vibration (Disc Motor) (tbd)
• LiPo 2200mAh https://www.adafruit.com/product/328
• LiPo Charging/Switchover https://www.adafruit.com/product/1944

[Assembly / Wiring]

[Configuring Vanilla Raspian]

[Install DSCv3 Software]