Updating Wurkkos TS10, Sofirn SP10 Pro, and other 3-Pin UPDI Lights

The Wurkkos TS10, Sofirn SP10 Pro, and recent/upcoming revisions to the Sofirn LT1, Q8 Pro, SP36, and potentially more all use a similar 3 pad layout (UPDI).


The Wurkkos TS10, an affordable entry-level light that runs Anduril

Identify The Light And Current Firmware

Thankfully thus far there is not a lot of variation in these lights. Most are new enough to be running Anduril 2 and a Version Check will include the model ID. Identifying the Correct Firmware is mostly a matter of matching the model from the Anduril MODELS or G Hart Anduril MODELS file.

Programmer Hardware and Probe

Updating these lights requires a Serial USB to TTL CH340 Module device and a probe capable of connecting to the 3 pads on the light.

Setup the CH340 programmer as described in CH340 Drivers and Serial Port.

There are pre-made kits for these as well as many ways to adapt other readily available probes or even craft them from scratch!

When connecting the probe to the light, use the notes in the guide for the probe for specifics on how and where to connect the probe.

Obtain a New Firmware File

Download or compile the appropriate firmware as described in Obtaining a new Firmware File. Most likely the correct firmware will be on G Hart Anduril firmware binaries, but over time it may also be in Anduril firmware binaries.

Setup Programming Software

Choose one of the Flashing Methods, setup the software, and use the software-specific guide for the following steps.


For simplicity, this guide will use avrdude examples, but zflasher and pymcuprog can all be used in a similar manner.

Test the Connection with the Light

Unscrew the head from the light and locate the flashing pads.


3 Pin UPDI Flashing Pads on Wurkkos TS10

Connect the probe to the programmer, the programmer to the computer or android device, and connect the probe to the flashing pads on the light.

See also

Refer to the probe-specific documentation for specifics about how the probe will connect to the pads on the light.

Use the test or ping function of the flashing software to confirm the connection is working.

PS> .\avrdude.exe -p attiny1616 -c serialupdi -P com7 -n

Backup the Current Firmware

Connect to the light and read the current firmware from the light to a file to make a backup.

PS> .\avrdude.exe -p attiny1616 -c serialupdi -P com7 -U flash:r:old-firmware.hex:i

Update the Light with New Firmware

Connect to the light and write new firmware from the file to the light.

PS> .\avrdude.exe -p attiny1616 -c serialupdi -P com7 -U flash:w:anduril.sofirn-sp36-t1616.hex

Perform a Factory Reset

Perform a Factory Reset after reassembling the light.