UPBDescriptionv1.4.pdf

From the designers of the protocol itself, more than you ever wanted to know. Handy when parsing UPB commands though.

Adobe Portable Document Format - 432.38 kB - 06/03/2026 at 19:30

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PIMDescriptionV1.7.pdf

From the designers of the protocol and hardware itself, and has the bit about the magic charge pump to make the RS232 interface work with microcontrollers.

Adobe Portable Document Format - 273.77 kB - 06/03/2026 at 19:30

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IMG_3901a.JPG

This one is my development rig. The two DB9 ports mean it can do pass-through to watch what UPStart is saying to the PIM, has a coupla toggle switches to change options (or just say "Mode Execute Ready") and blinkenlights to monitor line and WiFi traffic, etc. You'd not need one of these, just a demo of the depth of the rabbit hole gone down to do the PIM emulation in particular.

JPEG Image - 357.92 kB - 06/03/2026 at 18:58

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IMG_3902a.JPG

Bridge from WiFi to line, using SAI PIM.

JPEG Image - 346.77 kB - 06/03/2026 at 18:23

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IMG_3916a.JPG

Bridge from WiFi to line, using SAI PIM.

JPEG Image - 233.09 kB - 06/03/2026 at 18:23

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