Project:Tool Access Control/Solexious Proposal

(ACN refers to Access Control Node, a physical node attached to a tool)

I plan to

• Base the device on the Duemilanove arduino as it fits our needs and has a wide base of users.
• Use the wiznet chip for ethernet support
• Use i2c sm030 rfid readers
• allow different control outputs (relay, Darlington, servo control etc)
• use eeprom memory for internal storage

Services

Mission critical

These must function without networking or main server available:

• Check if card in ACN local db and allow use if is
• Set tool into "out of order" mode

Non critical

• Add cards
• Report back to central server (usage etc)

Progress

I have made a prototype shield for testing code while the full design remains to be tested and produced. http://www.flickr.com/photos/solexious/6865500239/

Design for the full ACNode at: https://github.com/solexious/ACNode Embedded code at: https://github.com/solexious/ACNodeEmbedCode

The server side component is now complete - it's available at https://github.com/mentarus/acserver and a test version of the code is running on babbage on port 1234. See https://github.com/mentarus/acserver/blob/master/application/controllers/api.php for usage examples.

Network protocol

This is mostly RESTful, but not entirely because we're using text/plain (for the small atmega). In particular, the /sync request could actually use /card with weird Range headers, but that's pretty awkward. It should be easy to upgrade to a full JSON or hypertext system.

Get card permissions

GET /[nodeID]/card/[cardID]

i.e.

• GET /1/card/04FF7922E40080

returns

• 0 - no permissions
• 1 - user
• 2 - maintainer

STATUS: Done

Add card

POST /[nodeID]/grant-to-card/[card_being_granted_to]/by-card/[card_with_admin_permissions]

i.e.

• POST /1/grant-to-card/04FF7922E40080/by-card/04FF792AAAAAA

returns

• 0 - card not added
• 1 - card added

STATUS: Done

Check DB sync

GET /[nodeID]/sync/

Returns first card in db

i.e.

• GET /1/sync/

returns the first card in the DB i.e.

• 04FF7922E40080

GET /[nodeID/sync/[last received card]/

i.e.

• GET /1/sync/04FF7922E40080/

returns either the next card in DB i.e.

• 03FF7922FF008F

or when out of cards returns

• END

STATUS: Done - tested on UI, but not with ACNode NOTE: Due to CodeIgniter REST limitations, the ACNode code will have to strip any leading and trailing quote characters from the card. 04FF7922E40080 is incorrectly returned as '04FF7922E40080', and the quotes must be stripped off if supplied

Report tool status

POST /[nodeID]/status/[new_status]/by/[cardWithAdminPermissions]

i.e.

• POST /1/status/0/by/04FF7922E40080

• 0 - out of service
• 1 - in service

returns

• 0 - not saved
• 1 - saved

STATUS: Done - tested on UI, but not with ACNode

QUESTION: should any user be able to take a tool out of service? Should it even require a card ID?

Check tool status

GET /[nodeID]/status/

Check if the ACNode has been remotely taken out of service, or put back in service

returns

• 0 - out of service
• 1 - in service

STATUS: Done

Tool usage (live)

POST /[nodeID]/tooluse/[status]/[cardID]

i.e.

• POST /1/tooluse/0/04FF7922E40080

Status is one of:

• 0 - tool use stopped
• 1 - tool in use

returns

• 0 - not saved
• 1 - saved

STATUS: Done

Tool usage (usage time)

POST /[nodeID]/tooluse/time/for/[cardID]/[timeUsed]

i.e.

• POST /1/tooluse/time/for/04FF7922E40080/34000

returns

• 0 - not saved
• 1 - saved

STATUS: Done - tested on UI, but not with ACNode

Case alert

POST /[nodeID]/case/change/[new_status]

i.e.

• POST /1/case/1

Alert if the ACNode case is opened

• 0 - case closed
• 1 - case opened

returns

• 0 - not saved
• 1 - saved

STATUS: Done - tested on UI, but not with ACNode