This diagram shows the CC3000 WiFi Breakout with onboard ceramic antenna, but you can also build it with the uFL connector version to add an adapter and antenna for extra sensitivity. The wiring is identical, the latter just requires plugging the extra parts into the connector on the CC3000 board. A lithium-polymer battery (100 mAh, or 500 mAh with some editing of the case design) plugs into the LiPoly backpack after assembly.

The LiPoly backpack sits atop the Pro Trinket on the BUS, G and BAT+ pins, and the power jumpers are modified to connect a switch.

An LED (any color) and 220 Ohm resistor in series are connected to Pro Trinket pin 9 and any available GND pin (you can use GND on the FTDI header if it's easier).

The remaining connections are:

Pro Trinket Pin

CC3000 Pin

















Measure wire

Align the Pro Trinket on top of the CC3000 and measure how much lenght each wire needs to reach the through-holes.

LiPoly backpack

Cut the trace with an hobby knife that connects the two through-holes for the power switch. This will allow us to use a slide switch to power on and off our circuit.

LiPoly backpack headers

Solder the included header to the LiPoly backpack, BAT+, G, and 5V.

Share Power cable with headers

Squezze in the power and ground cables that will power the CC3000. BAT+ to BAT+, G to G and 5V to BUS.   Tin and use flat plairs to fit the the two cables with the headers.

Solder CC3000

Solder and adjust any of wires so they can reach each through-hole without too much slack. Use tweezers to bend the tips to keep them in place while soldering.

LED and resistor

Follow the circuit diagram to see which pins to insert the LED and resistor. Keep the legs of the terminals long. Bend these leads using pliers and arrange the LED so that it shines through the cover design. 

uFL cable

Coil the uFL cable to fit inside the enclosure. Unscrew the included nut and insert into the enclosure. Screw the nut back on to secure the uFL cable to the enclosure.

Insert Circuit into Enclosure

Carefuly insert the circuit into the enclosure at an angle with the opposite side of the USB port going in first. Ensure the uFL cable isn't uncoiled (otherwise it won't fit) while inserting the circuit. The micro USB connector should be facing the port opening. This can be a tidious task, you may want to give it multiple attemps to get the fittings just right.

Slide switch

Insert the slide switch at an angle with twezzers. A bottom platform and side clips will keep the slide switch in place.


This enclosure was designed to fit a 110mAh lithiuim polyer battery. Coil the battery cable and fit on either side of the enclosure.

The case design can be edited to accommodate a larger 500 mAh battery for all-day use.

Wearable clip

Align the clip corners and apply a small amount of force to attach to the enclosure.

Wear it!

Clip on to a backpack or on your persons to see where open wifi spot are hidding!

This guide was first published on Oct 29, 2014. It was last updated on Sep 21, 2023.

This page (Assembly) was last updated on Oct 20, 2014.

Text editor powered by tinymce.