Remotely activating accessory mode (for climate control)?

joekitch · 04-22-2014, 12:30 AM

so, remote start on an e90 will be a very expensive pain in the ass, but how easy would it be to put the system into accessory mode instead? would it be significantly easier than remote start or about the same?

basically i just want the climate control to kick on a few minutes before i get to the car, i'd rig up an arduino thing so can activate it through text message over GSM.
then add a second battery for a larger pool of energy to run climate control for a decent length of time (upwards of 10 minutes) without draining the battery completely.

of course, this is assuming heat+AC works without the engine in the e90, which may not be the case

mathematics · 04-22-2014, 12:35 AM

Will your arduino wake on SMS?

jadnashuanh · 04-22-2014, 01:06 AM

Newer BMWs can turn on the ventilation system based on a timer in one of the menus, but except for something like the new i3 that uses a heat pump, the compressor on the a/c unit only runs with the engine on and heat only happens when the engine has warmed up. So, I think you're out of luck.

joekitch · 04-22-2014, 09:59 PM

Quote:

Originally Posted by jadnashuanh

Newer BMWs can turn on the ventilation system based on a timer in one of the menus, but except for something like the new i3 that uses a heat pump, the compressor on the a/c unit only runs with the engine on and heat only happens when the engine has warmed up. So, I think you're out of luck.

drat, guess i'll have to look for plain old remote start
and yes the arduino will wake on SMS

04-22-2014, 12:30 AM	#1
joekitch First Lieutenant 70 Rep 377 Posts Drives: 2008 328xi wagon, dark green Join Date: Jan 2014 Location: massachusetts iTrader: (0)	Remotely activating accessory mode (for climate control)? so, remote start on an e90 will be a very expensive pain in the ass, but how easy would it be to put the system into accessory mode instead? would it be significantly easier than remote start or about the same? basically i just want the climate control to kick on a few minutes before i get to the car, i'd rig up an arduino thing so can activate it through text message over GSM. then add a second battery for a larger pool of energy to run climate control for a decent length of time (upwards of 10 minutes) without draining the battery completely. of course, this is assuming heat+AC works without the engine in the e90, which may not be the case
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04-22-2014, 12:35 AM	#2
mathematics Captain 69 Rep 994 Posts Drives: 08 328i e93 alpine white Join Date: May 2009 Location: Queens, NY iTrader: (0)	Will your arduino wake on SMS? __________________ iPhone 6 Plus (iTunes library/iTunes radio/Waze, etc) to Airport Express via AirPlay. Toslink out of Airport Express to Helix P-Six DSP. PHD AF 1.C tweeters, PHD FB 4.1 midranges. Jehnert Door Cards and mid-bass'.
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04-22-2014, 01:06 AM	#3
jadnashuanh Major 51 Rep 1,061 Posts Drives: 535iGT x-drive; i3 BEV Join Date: May 2010 Location: USA iTrader: (0)	Newer BMWs can turn on the ventilation system based on a timer in one of the menus, but except for something like the new i3 that uses a heat pump, the compressor on the a/c unit only runs with the engine on and heat only happens when the engine has warmed up. So, I think you're out of luck.
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