Hi all, Now that I have an OVMS board that can actually sustain the HUD display power (not sure what was wrong with the previous one), I've certainly been making some inroads and found having the HUD a useful tool. I've got the internal ECU running, although I had to add a script for RPM to get the absolute value since the HUD doesn't like -ve numbers! I'm not sure I need RPM, but at least I now know that I'm retrieving sane values... so that was quite useful. Interestingly at 100km/h, the RPM gets up to 7000 which the HUD doesn't expect and with alarms on, it engages the 'shift now' HUD alarm as well as the 'that's definitely too high an RPM' HUD alarm!!! lol. (I worked out how to turn the HUD alarms off). One of the issues I'm having is that the refresh rate is 1 every 3 to 4 seconds, even after I upped the POLL time entry for the Ioniq 5 OBDII messages that contain 'speed' and 'rpm' to be every 1 tick. I'm not sure how long it takes to complete receiving .. or how often '1 tick' is happening in reality, but I'm guessing that might be some of the problem. What do other people who have a HUD experience? The other problem is that the ECU seems to occasionally stop working/responding to HUD requests.. so I'm going to have to look at that. I don't even have file logging at the moment on the new OVMS.. but once I get that up and going again I may have some more data. I have noticed that the OVMS itself isn't resetting .. so it's not a system crash. Closing the ECU down along with the power using *power.off* event and starting them both up again on *power.on* certainly means I'm more likely to start off with it working! Any thoughts on diagnosis welcome. //.ichael