Hi Matt,
The original SiteVision handle with a DA1 just connects through the USB cable, no Bluetooth required. In the SiteVision app make sure you have this selected in the Configuration menu, there is a dropdown option for Handle vs Pole. Then just plugin the USB cable to your device.
You don't need TMM at all to use SiteVision, so make sure if you have TMM connected to the DA1 that you disconnect this first before running the SiteVision app.
Lastly, if you have an older phone give the USB connector a good clean out with a can of air - you can get a lot of dust trapped in there over time that can potentially cause problems.
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Ben Broad
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