Thomas.B Posted February 20, 2019 Share Posted February 20, 2019 Hi! I have defi gauges in the a-pillar and they annoy the living hell out of me. So I would like to be able to get all readings i have (oil pressure, oil temp, exhaust temp) on the a-pillar onto a screen instead. Are there any plug and play available for this model or what options do I have? Thanks! Quote Link to comment Share on other sites More sharing options...
Wez Posted February 20, 2019 Share Posted February 20, 2019 AEM v1 has telemetry output via RS232 which works with the AEM serial gauge, the datastream is pretty basic and easy to work with so doing building something wouldnt be that difficult. Many years ago (2008) I did knock up a display on an old Compaq iPaq Quote Link to comment Share on other sites More sharing options...
Wez Posted February 20, 2019 Share Posted February 20, 2019 From memory I think some Race Technology products are able to work with AEM serial stream too. Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted February 22, 2019 Author Share Posted February 22, 2019 Thanks for the input! Ideally I'd like to fit a 8-10" screen as I do with my computer when mapping etc but only for it to show the readings above and maye the lambda too. Quote Link to comment Share on other sites More sharing options...
Wez Posted February 22, 2019 Share Posted February 22, 2019 Thanks for the input! Ideally I'd like to fit a 8-10" screen as I do with my computer when mapping etc but only for it to show the readings above and maye the lambda too. Whats driving the screen? Is it a car PC that has a serial port, what OS is it running? Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted February 23, 2019 Author Share Posted February 23, 2019 I was just thinking of fixing an Android pad and use that so would need to connect it somehow to micro USB or via adapter. I otherwise connect via USB and adapter to serial port when using computer. Thanks again for the help, appreciate it! Quote Link to comment Share on other sites More sharing options...
Wez Posted February 26, 2019 Share Posted February 26, 2019 Some Android tablets do allow serial over USB with the correct cable, its been a long time since I looked into it, if you can find one that allows / supports it you could then knock up an App that could decode the stream. Quote Link to comment Share on other sites More sharing options...
2jz240z Posted April 9, 2021 Share Posted April 9, 2021 Hi@Wez, sorry to bring up an old topic, but how to you read the telemetry DataStream. When i pull in the data, i get odd value like UTF-16. do you have anymore input on this AEM V1 to pc. Quote Link to comment Share on other sites More sharing options...
Wez Posted April 9, 2021 Share Posted April 9, 2021 Crikey this is an old one Have you done of any protocol / stream decode, the raw values wouldnt mean much at all, you need the scalars and offsets along with the header byte etc. From memory there was some control over the stream as its the same stream used for the telemetry serial gauge they released, the ECU switches to stream output after a period of time. Some old info I found, not sure how up to date it is :- Header byte : 0x55 Name Units Scalar Offset Min Max Signed? Bitmask Battery Volts Volts 0.062500 0 0 15.93750 n - Throttle % 0.390625 0 0 99.99847 n - batt volts 00-ff ie B9 hex = 185 dec 185x0.0625 = 11.56v throttle 00-ff ie ff hex = 255 dec 255x0.390625 =99.6% Quote Link to comment Share on other sites More sharing options...
2jz240z Posted April 9, 2021 Share Posted April 9, 2021 Morning @Wez, the problem I am having is I can not see header byte 0x55 from hyperterminal, putty, or python from the raw data package to decode it. I get weird characters in both putty and hyperterminal so I'm not sure if I'm doing it right. Aem v1 serial to rs232 baud rate of 19200 Quote Link to comment Share on other sites More sharing options...
Wez Posted April 9, 2021 Share Posted April 9, 2021 Baud rate : 19200 Parity : None Data size : 8 bits Stop bits : 1 you need to make sure you have telemetry stream for the serial gauge enabled, not the normal serial stream for managing / configuring via AEM Pro, once enabled it will switch stream automatically after a few seconds if AEM Pro is not connected, well thats how it worked from memory, its been a while Quote Link to comment Share on other sites More sharing options...
2jz240z Posted April 9, 2021 Share Posted April 9, 2021 Thanks @Wez, I enable the telemetry on aem pro and only setting 3 parameters so I can get the reading correct. I will add pictures so you can see what I'm doing. However, my data on hyperterminal is still unreadable. Quote Link to comment Share on other sites More sharing options...
Wez Posted April 9, 2021 Share Posted April 9, 2021 Looks like some sort of terminal ASCII translation, you want to view the raw stream without any translation in HEX. RealTerm is much more suited to this, you can flick between display types on the fly, you want hex :- https://realterm.sourceforge.io Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.