integrale8v Posted April 19, 2017 Report Share Posted April 19, 2017 Hi is it possible to add Duty cycle measurement on the Digital input?I have a problem with controlling the AC on a BMW e39, the request signal is a signal with changing duty to show what the AC/heater wants.Page 14 here: https://www.slideshare.net/fajarisnanto/60087943-bmwe39integratedautomaticheatingandairconditioning Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 20, 2017 Report Share Posted April 20, 2017 I see this one is on the wish list already but it is a fair way down. I will add a +1 to it. Due to the lack of requests it probably wont happen anytime soon. integrale8v 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 21, 2017 Report Share Posted April 21, 2017 Hi Integrale8v,I just had another thought that might work. I admit its a bit of a long shot but I dont have a E39 handy to test... If you are not using flex fuel you might be able to set your AC request DI as Ethanol content sensor. With a ECS, the fuel temperature is based on the received pulse width, so I suspect you may be able to see a change in the "Ethanol temp" parameter based on the AC request duty cycle. You can then use a virtual aux with "ethanol temp <" & ethanol temp >" to drive the ac clutch. Quote Link to comment Share on other sites More sharing options...
integrale8v Posted April 21, 2017 Author Report Share Posted April 21, 2017 Hi Integrale8v,I just had another thought that might work. I admit its a bit of a long shot but I dont have a E39 handy to test... If you are not using flex fuel you might be able to set your AC request DI as Ethanol content sensor. With a ECS, the fuel temperature is based on the received pulse width, so I suspect you may be able to see a change in the "Ethanol temp" parameter based on the AC request duty cycle. You can then use a virtual aux with "ethanol temp <" & ethanol temp >" to drive the ac clutch. Hi. I already tested that, and it just showed the same temp all the time (belive it was 139c) . The signal is only 5hz so maybe out of the "range" of the ethanol sensor? Quote Link to comment Share on other sites More sharing options...
Jts77 Posted July 26, 2017 Report Share Posted July 26, 2017 Hi,i am having the exact same problem. Any news on this? Quote Link to comment Share on other sites More sharing options...
Jts77 Posted January 15, 2019 Report Share Posted January 15, 2019 Still need this. Quote Link to comment Share on other sites More sharing options...
cj.surr Posted June 29, 2019 Report Share Posted June 29, 2019 It is possible to convert duty cycle to an analog voltage (to be measured by the Link) using an external circuit. I am not sure about such a low frequency as 5hz, but it's likely possible with the right components. https://www.codrey.com/electronic-circuits/pwm-to-voltage-module-v1/ Quote Link to comment Share on other sites More sharing options...
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