A Free Software and Hardware Project for Automated Biodiesel Dispensing Kiosks and Coop Management Software
- Kiosks interface with pre-existing fuel fill/transfer pumps and fuel meters, providing self-service credit-card purchases to coop/fleet members.
- The Coop Management Software runs on a remote hosted server and manages coop/fleet accounts and one or more kiosks.
- This software and hardware has been in operation at the [Baltimore Biodiesel Coop] (http://baltimorebiodiesel.org/) since 2009
- SmartIO: An interface board with an 8-bit AVR microcontroller that interfaces to
the hardware components of a fuel station:
Pump, fuel meter, display, keypad, credit-card reader, electric strike, motion detector, lights, etc.- Serial interface to an ARM SBC in the kiosk running Linux that manages secure internet communication with the hosted Coop Management Software. An off-the-shelf Linux ARM SBC is used; the ARM SBC itself is not part of this project.
- Schematics and board layouts using KiCad in
BBD9000/Kiosk/SmartIO/hardware/v3.3/
- Design files for secure outdoor mounting arrangements, 12 V standalone operations, etc.
- SmartIO: Firmware running on the AVR 8-bit microcontroller. Cross-compiled C code (avr-gcc)
- source in
BBD9000/Kiosk/SmartIO/src/
- source in
- ARM-SBC: Software running on a single-board Linux computer in the kiosk for interfacing between SmartIO board and BBD9000-CMS.
- Source in
BBD9000/Kiosk/ARM-SBC/src/ - Several C programs and scripts that interact using shared memory and fifos (memory layout in
BBD9000mem.h). - Main event-driven finite state machine for kiosk automation (
BBD9000fsm.c). - Serial communication to SmartIO (
BBD9000SmartIO.c) - Encrypted HTTP/HTML communication to hosted BBD9000-CMS (wired/wireless/GPRS) (
BBD9000server.c)
- Source in
- Hosted software that communicates with kiosks, coop/fleet members and administrators using HTML/HTTP.
- Source in
BBD9000/Server/web/fcgi-bin/, supporting files/directories inBBD9000/Server/ - Maintains per-member account, balance, sales and contact information
- Administrative pages to keep track of inventory levels at kiosks, consolidated sales, etc.
- Member pages to update contact info, track purchases, add family members, credit-cards, etc.
- Credit Card Gateway communications for financial transactions (currently Authorize.net Card Present protocol)
- Implemented using Perl/MySQL, deployed using [lighttpd] (http://www.lighttpd.net)
- Source in