#36582, "DIY advanced key project." Oct-30-08 06:12 AM by micyek
So I've learned not to tip my hand to projects I have rattling around in my head. Mostly because if I don't finish them there is no shame except for the shame I place upon myself. But I need some help with this one.
So I looked at the original RFID kit that bought and found it inadequate for both the door locks and ignition because of the rage limitation (2 to 3 inches) making receiver antenna placement difficult for both ignition and locks. Similar to these:
So putting more thought into and drawing inspiration from my father -in-law's C6 corvette. Just unlocking the doors and enabling the ignition isn't enough. The "car" must also lock doors, and disarm the ignition when the fob is not in the area among other real life scenarios that happen on a regular basis. So this requires quite a bit of logic which probably could be done with switches and relays. But me being me, I like to make things difficult on myself and remembering that I bought one of these a few years ago:
Along with a carrier board I thought that this would work nicely for what I need.
So in short the RFID receiver with trigger the basic stamp to run the logic program which I have flow charted below. Bare with me, this is the first flow chart I ever made.
What I need your help for is. Can you think of any scenarios that can't be solved by the flow chart? I tried to think of thing like just walking up to the car and getting something out, leaving the car running unattended, and just sitting in the car without starting or leaving the fob within range. Let me know what your thoughts are and I'll do my best to actually finish this project. FYI this will be going into my camaro because it already has power locks and windows. That's why this is not in a tech section.
#36591, "RE: DIY advanced key project." In response to Reply # 0
Maybe I'm not reading it correctly, but if it goes the way I'm reading it let's assume you've driven the car and are now at your destination and park and get out:
Was Car shut down? -> Yes Was Door Opened? -> Yes Is key present? -> No Result: Sound horn every 30 seconds, disarm ignition
Shouldn't a No to the last question there go to a standby mode (but done immediately instead of waiting 5 minutes?)
I contributed to the Wiki! EVO IX - just a really expensive boost gauge and a K&N air filter 96 Eclipse RS -awaiting registration and inspection 95 Eclipse GS - parts car Mods/Profile - http://www.2gnt.com/index.php?d=cs82685
#36606, "RE: DIY advanced key project." In response to Reply # 1
Originally posted by cs82685 Maybe I'm not reading it correctly, but if it goes the way I'm reading it let's assume you've driven the car and are now at your destination and park and get out: Was Car shut down? -> Yes Was Door Opened? -> Yes Is key present? -> No Result: Sound horn every 30 seconds, disarm ignition Shouldn't a No to the last question there go to a standby mode (but done immediately instead of waiting 5 minutes?)
You are reading it right. But the way I look at it the door was open, but not closed. Possibly meaning that you got out and walked away. That way you avoid leaving the door open with the car unattended. So locking the car would do no good with the door open. Not very likely I know, but just an added "safety" feature. I plan to accomplish the door sensor just by tapping into the dome light switch.
But I may be to close to the project and fooling myself into thinking that the problem and solution are more simple than I thought.
Keep asking question like that to make me look at the chart different.
I start learning PBasic last night. ( the language of the basic stamp. It seem pretty easy.
#36615, "RE: DIY advanced key project." In response to Reply # 4 Oct-31-08 08:06 AM by cs82685
Ok, I think I got it. So it would go like this upon shut down:
Was the door opened? Yes Is the key present? Yes Arm Ignition Was the door closed? Yes Is the key present? No Back to Start, Doors locked, windows up, ignition disarmed, trunk disarmed.
So while the door is open and the key is present it arms the ignition. Then once the door is closed if the key is not present it locks up.
Definitely sounds like a cool project. Good luck with it
The only other scenario I can think of is if you were working on the DSM (what else is new) with the keys in your pocket and you were consistently moving into and out of range of the RFID it would drive the thing nuts opening/closing windows and locking/unlocking the car
I contributed to the Wiki! EVO IX - just a really expensive boost gauge and a K&N air filter 96 Eclipse RS -awaiting registration and inspection 95 Eclipse GS - parts car Mods/Profile - http://www.2gnt.com/index.php?d=cs82685
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