1. Laser Rangefinder With Serial Port
2. Laser Rangefinder Scopes For Rifles

In the web you can find some interesting articles about the UT390b and the serial read out of the data.There's even a special UT390b-library for the arduino.You just need 3 pins (GND, RX and TX), placed under the batteries on the back of the unit. Open the rangefinder (instruction: ) and solder 3 wires on the outputs.Attention:. The Tx-signals coming from the arduino have a 5V-level. This is too high for the UT390b and may destroy the electronics. Therefore you'll need a voltage devider with two 10kOhm resistors! The 2.7V-output doesn't need to be connected. A further problem is, that the UT390b will sometimes turn automatically off during the measurement or will stop because of an error message (f.e.

To be able to continue the measurement without problems you should replace the batteries with an external power supply and a switch for the restart! I use a LM317 as a voltage regulator.If the UT390b shows an error on its Display you'll just have to switch it off and on again followed by pressing the ON-button. If the UT390 turns off automatically you'll just have to push the ON-button. When you have the data (phi, theta, distance) you want to visualize them. I haven't found a suitable prgram in the Internet to do that.

The problem is, that the values aren't regularly. Most of the Commercial programs need regular (x/y)-Points to draw a net.Luckily I've written a program in Turbo Pascal 20 years ago to visualize 3D-data. The intention was to display topographic surfaces like my hometown. For this I had to read the altitudes of 1600 points in a map;-)For the LiDAR I use this program to visualize the detected surrounding.

With keys I'm able to Change the Point of view, the magnification and the offset. Scanning my living room was the first test of my LiDAR. At this time I didn't have the option switching off the UT390b manually yet. Therefore some lines are a bit distorted and displaced, because I had to take the rangefinder out of the mount a few times during the measurement.Equipped with the external switch and a more stable mounting I'll now produce better results;-)Thank's for spending your time. Maybe you're interested in my other projects:https://www.youtube.com/user/stopperl16/videos. For those interested in a laser distance meter with HID usb connection look at the sndway SW-S100.

It comes with a CD with a basic application but also a list with command codes. It's a bit more expensive (about US$60 on AliExpress). The software does not seem to be very stable on my PC, but it does work - sending a command form the PC to measure and retrieve the distance on the PC. I'm now looking into implementing an application in C#, but I'm not very familiar with HID-USB, so any help is welcome. I also purchased one of these.

So far the serial RX and TX pins on the back of the board are non responsive. I'd guess that a serial command may be able to unlock the serial mode but that may be wishful on my part.I did hook a scope and observed the pins while powering on. They don't do anything. Essentially low the entire time.

We need to figure out some command or possibly a jumper to enable the serial. Appears to be a knock off of the UNI-T or a no name version of the latest board.

I know mine differs slightly in the upper left side of the board vs. Pictures I have seen of the 390B+. I tried the various commands with an UNO in reset and using the hardware serial to USB of the board. The 390B+ is not responding or putting anything out on the TX or RX pins. I tied a number of commands and various baud rates but nothing. I'll have to spend some time later to see if there is some easy hack or enable of the serial involved.The pins that are exposed from the battery compartment do look more like the ARM debug port more than anything else.

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Laser Rangefinder With Serial Port

Unfortunately I do not have access to an ARM debug interface. I also got a UT390B+. I opened it and it actually indicates the TXD and RXD on the board.

Laser Rangefinder Scopes For Rifles

Interestingly, these are not directly connected to the connectors accessible under the battery cover (I measured resistance with any of the connectors and these were all high).I connected the TDX to the RX and RDX to the TX on an Arduino Due, together with the negative battery lead to ground. Using the as linked to above, I was however not able to read any data.Has anyone had more luck reading data from the 390+?