opentag

opentag one

Location, made easy.

compact ranging hardware. STM32, DW3000, USB-C, CAN FD.

firmware specs cad
opentag one pair under bringup

how it works

ranging, two ways.

TWR two-way ranging. one tag pings, the other replies. distance from round-trip time.
A B
TDOA time-difference of arrival. one tag pings, many anchors listen. position from arrival deltas.
a1 a2 a3 a4 T

specs

the board.

radio
DWM3000 UWB
mcu
STM32-M4 · 170 MHz · 256K flash · 128K RAM
programming
SWD · USB-C via web console
power
6–24V · reverse-polarity protected
i/o
USB-C, CAN, CAN FD
firmware
Embassy (Rust)
enclosure
PETG case · acrylic lid

bench

real hardware.

CAN FD link
CAN FD link.
TWR pair
TWR pair.
paired ranging
paired ranging.
single tag
single tag.
board close-up
through the lid.

cad

v2 mechanicals.

open in onshape

uses

where it fits.

robotics

indoor tracking where GPS won't reach.

anchor nets

build, debug, and time UWB anchor layouts.

bringup

flash, log, and calibrate from the browser.

asset tracking

prototype tags before a custom design.

education

RF, Rust, and sensor fusion you can read.

field testing

antennas, placement, calibration drift.