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Protocol Interfaces


All-in-one USB to isolated-UARTx2/CAN/USB/RS485/RS232 converter

$19,406 raised

of $4,200 goal

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Ollie is an isolated, multifunction interface module and USB-to-isolated-UARTx2/CAN/USB/RS485/RS232 converter. This versatile device combines our most commonly used interface modules into one safe, reliable, compact, and affordable package.

Need quick access to safe power? Ollie’s isolated power output requires you to set a voltage level before plugging in the host USB, which prevents accidental changes in voltage. All interfaces are ESD protected.

The main objective of this project is turning this mess of wires (left) into a neat and useful device (right)!

Ollie prioritizes safety through isolation, which will save your computer from damage if things go wrong when you’re interfacing with high voltage devices.

Ollie is the perfect tool for hackers and field engineers; a compact device to keep in your tool box whether you’re traveling, hacking your car, or just need quick access to power supply without worrying about damaging your laptop.

Features and Specifications:

Configurable DB9 Adapter

Ollie can be used with a configurable DB9 adapter which can be plugged in instead of the screw terminal. The function can be selected by moving all three DIP switches to the desired configuration. Also CAN OBD-II or CiA 303-1 function can be selected using the jumpers.

Custom Enclosure

Ollie comes with a custom protective enclosure, so you can feel safe using it in any situation.

Product Use-cases:

We designed Ollie as the perfect multi-tool for hackers and field engineers; to be a "Swiss Army knife" of interface modules. With that in mind, Ollie can be used in a wide range of situations, but here are some ideas of where we think it is useful.


Ollie CANABLE PROμArtWaveshare USB TO RS232/485/TTLDFRobotMulti USB/RS232/RS485/TTLAdafruit USB Isolator
Isolation Yes Yes Yes Yes No Yes
Isolated UART 2x UART No 1x UART 1x UART Non isolated No
Voltage level UART 1.8, 3.3, 5 V No Yes 3.3, 5 V No No
UART max data rate 12 Mbps No 3 Mbps 0.9216 Mbps 2 Mbps No
Isolated CAN Yes Yes No No No No
RS485 Yes No No Yes Non isolated No
RS232 Yes No No Yes Non isolated No
Isolated USB downstream Yes No No No No Yes
Isolated USB current 200 mA No No No No 100 mA
Isolated power out 1.8, 3.3, 5 V No No No Non isolated 5 V 5 V
Multifunction DB9 connector Yes No No No No No
Price (USD) $70 $60 $45 $21.99 $19.50 $34.95

Support & Documentation

Ollie Pinout Diagram

In the Press

"Ollie is not the first of it’s kind, there are several tools... which possesses similar features and are used for similar purposes... but all fall short in one way or the other when compared to Ollie."


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Produced by Ali Slim in Melbourne, VIC, Australia.

Sold and shipped by Crowd Supply.


One DB9 pluggable connector, for use with Ollie.

$10 $8 US Shipping / $18 Worldwide

About the Team

Ali Slim

Melbourne, VIC, Australia

Ali makes hardware tools.

A. Slim


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