automount USN in Raspberry Pi 2 B

Hier geht es darum, einen USB-Stick automatisch auf dem Raspi zu "mounten". Das bedeutet "einbinden oder montieren", so dass man über das Verzeichnissystem darauf zugreifen kann. 

Hierfür ist die Software "usbmount" geeignet, welche auf das "automatisch Einbinden" von USB-Sticks ausgelegt ist.

USB - Stromversorgung - Erhöhung des Stromflusses durch SoftwareEingriff

Tutorial: https://docs.google.com/document/d/1Pk-KyhFfpn0N-uRCGs-bm5hmn8Jmk1apJg558RdnZn4/pub



Raspberry Pi 2 USB.drive tauglich machen:

sudo nano /boot/config.txt 

max_usb_current=1

sudo reboot

erst dann das USB.drive einstecken
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http://www.plantoschka.com/plantoschka/2015/2/8/raspberry-pi-2-externe-25-festplatte

Notwendig dafür ist ein Eintrag in der config.txt. Diese findet ihr bei Raspbian unter /boot/config.txt und bei Openelec unter /flash/config.txt
Ganzen unten in die config.txt fügt ihr folgenden Eintrag hinzu:

max_usb_current=1

• Setting max_usb_current=1 sets the available current over USB to 1.2A (default is 600mA)
• This can help if you have a decent power supply (2A, at least) and need to power something like a small external HDD or something that needs 300+ mA.
• This feature is only available on the B+ and Pi model 2 (at the time of this writing).

All that max_usb_current=1 does is to set GPIO38 high, which in turn 
turns on a FET, which connects a second 39K resistor in parallel to an 
existing one, on pin 5 of U13, the AP2553W6 USB power manager, lifting 
the current limit from 0.6A to double that (1.2A), see no possible 
scenario there why the PI resets because of that, except in case the 
gate of the FET Q4 is somehow shorted to GND. Which could be caused by a
 production fault. Inspect Q4, as look if there is solder shorting pins 
together. Also R6 (resistor mounted between gate of Q4 and GND) should 
be 100K not 0 Ohm. U13, Q4 and R6 should be near the USB ports.

http://www.raspberrypi.org/forums/viewtopic.php?f=29&t=100244

http://raspberrypi.stackexchange.com/questions/27708/is-setting-max-usb-current-1-to-give-more-power-to-usb-devices-a-bad-idea 

similar sneaker-net approaches:

Similar Sneakernet projects

Information Without Borders - Sneakernet routing software project (GNU free open-source software). Code is available. The description says that people meet at random and trasnfer files, so emails can takes days or weeks. The OLPC Sneakernet can control how long messages take, because the couriers would work to an agreed schedule.

Wikipedia says – “The charity relief organization Information Without Borders is attempting to implement a sneakernet routing protocol for providing cheap Internet access to developing and post-conflict regions using donated PDAs and mobile phones”.

Alternative data-services for remote areas

• Data delivery by Radio – Radio and broadcast
• Wi-Fi enabled motorbike - Motoman Article and Discussion pages.
• Mobile Access Points / Wi-Fi Vehicles - First Mile Solutions - DakNet. They provide a service with data delivery by Mobile Access Points; Wi-Fi enabled motorbikes and buses. They visit villages and transfer data to/from Wi-Fi enabled kiosks. Local people use the kiosks for email, SMS, voicemail, web searches, and other local products and services. The villagers can buy and sell products (medicines, craft-items, seeds, fertilizers, books, cosmetics, music) through the kiosks. The goods are delivered to them on the same vehicles as the data. The website has a good range of DakNet articles and .PDF files which explain the social-background and advantages/disadvantages of real-time versus delayed file delivery services in rural areas (store-and-forward systems). This social-enterprise company was set up by people from MIT to provide low-cost data services, at prices as low as $1 per user per month. ‘Dak’ is a Hindi word for ‘Post’ or ‘Postal’.
• 2003 MIT article about First Mile Solutions DakNet (.pdf), including the prices and economics of the service (cost of installation, cost per email, etc).
• Diagram of DakNet
• United Villages Their website says "United Villages provides villagers in Asia, Africa, and Latin America with a digital identity and access to locally-relevant products and services using our low-cost, store-and-forward "drive-by WiFi" technology. Our Mobile Access Points (MAPs) are installed on existing vehicles (e.g. buses and motorcycles) and automatically provide access for WiFi-enabled Kiosks along the roads."

USB GPS Receiver - there are new, endless possibilities

http://www.hohotrade.com/gps-receiver-usb-adapter-for-computers-netbook-laptop-umpc-transform-your-laptop-into-a-gps-navigatortccg29027-p-14674.html

• usable as : time code reciever by satellite in developing countries, where NTP is no service
• NMEA - data production
• put this into mobile MULE part and the time code problem will be solved
•  EMULE can also serve as a "ntp-server : time code provider" - time derived from satellites