Cant comment on the EMS madman, but what i did was ...
1. Purchase a WIFI OBD plugin off ebay for $19
2. Used my old Iphone 4 - set up in a charging cradle on the dash and its linked to the OBD wifi sender
3. Purchased the DASHCOMMAND APP for iphone
This app reads all the OBD data and gives you customizable screens to monitor your engine data live.
You can set alarms on the coolant temp, and many other things.
As this was my old phone, I don't use the iphone for anything else now except as a monitoring tool. Don't have a sim in it anymore.
Is a cheap way of live engine monitoring, and very accurate.
Rather than just a coolant alarm, it allows me to monitor a lot more, plus even reads fault codes.
I purchase a charging cradle off ebay for $45 - wired it in permanently, and i have a ipone driven live OBD monitoring tool.
Heres a couple of screenshots from the iphone.
If anyone's interested i will take a couple of picks of the actual set up working in my car tomorrow and post them.



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The EMS system seems to get good reviews from users.The round face appears popular.
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