Controlling the XM125 through uart only, no arduino

I’ve been programming SBC for many years, and I’ve been tasked with getting this sensor to work with some existing hardware that is not arduino. I want to get this sensor to send the distance data it sees out on a uart, my hardware should be incidental, lets just say we want the data out on a ttl usb, I can then run it up to the normal 12v uart with a converter, and then put that into a putty session and watch the data on the sensor. None of the examples seem to walk me through that, shoot, I can’t even find where the uart is, where to put power on the board, just a simple acceptance test for the device.
What software I should download to “update firmware”??? what wires I should attach to power this board, voltage, etc, pins, what wires the TX, RX come out on (is it on the USB C connector??? or on the “debug” pins tx,rx???)
I would think it should work like any uart device, set the baud, hook up a terminal program and issue command/ask for responses, but I can’t find any documentation that describes things in this fashion

Please advise, Thanks -J

Tx and Rx are labeled on the board

Run through the hookup guide…note there is a left-hand menu that covers the FW update as well

The debug UART is broken out but the primary UART isn’t. (It’s connected to a USB to serial converter)

You might need to remove the CH340 chip from the back of the board and attach wires to the GND - pin 1, TX - pin 2, RX - pin 3, CTS - pin 9, and RTS - pin 14 pads where the CH340 was.

There’s a chance you might get away with not removing the chip and attaching wires to the pins if you don’t plug the USB connector in, you’d have to try it first and see if it works.