Overview — The Robot That Did Not Need the Cloud

1.1 What it is

Cozmo is a palm-sized desktop companion robot released by Anki on 16 October 2016 at USD 179.99. It runs on two rubber treads, carries a forklift-style lift arm at the front, and shows an animated pair of eyes on a small display that functions as its face. Three sensor-equipped Power Cubes ship in the box; the robot recognises them, pushes them, stacks them, and plays games with them. It arrives fully assembled. There is nothing to build and nothing to solder.

What makes Cozmo worth a volume series is not the toy. It is the architecture underneath the toy, and what that architecture turned out to be worth.

Cozmo does almost none of its own thinking. Face recognition, pet detection, expression estimation, path planning, the animation system and the emotion engine that gives the robot its personality all run on a smartphone or tablet app, not on the robot. The app is referred to in the protocol documentation as the engine. The robot is, in the strict sense, a peripheral: it broadcasts its own Wi-Fi network, the phone joins it, and the two exchange UDP packets many times a second for as long as the session lasts.

That design decision was made in 2016 for cost reasons — offloading vision to a device the customer already owned meant the robot did not need an applications processor. It had an unintended consequence that matters more than the original motivation. When Anki collapsed in 2019, and again when Digital Dream Labs let its servers lapse years later, Cozmo kept working, because nothing it needs in order to play was ever hosted by the company.

1.2 The contrast that defines it

This hub already documents Cozmo’s successor. Anki’s Vector, released in 2018, put a Qualcomm Snapdragon inside the robot, added a four-microphone array, and answered to the spoken phrase “Hey Vector.” It was the more capable machine in every obvious respect — and it was the one that broke. Vector’s speech recognition and its knowledge-graph answers ran in Anki’s, and later Digital Dream Labs’, cloud. When that cloud went dark, a retail Vector lost its voice until the community built wire-pod, an open local server, to stand in for the vendor’s data centre.

Cozmo needed no such rescue. The comparison is the cleanest illustration in this collection of a principle that has nothing to do with robots:

Table 1 — collection of a principle that has nothing to do with robots

	Cozmo (2016)	Vector (2018)
Where the intelligence runs	on the owner’s phone	partly on the robot, partly in a vendor cloud
Voice input	none fitted	four-microphone array, wake phrase
What the shutdown killed	nothing required for play	speech recognition and spoken answers
What was needed to revive it	nothing	an open-source replacement server
Failure mode of the design	the app must remain installable	the vendor must remain solvent

Neither design is simply better. Cozmo’s dependency did not disappear; it moved. A robot tethered to a phone app is hostage to app stores, operating-system version requirements and the continued existence of a build that will run on current hardware. That is a slower and more forgiving kind of decay than a server being switched off, but it is decay all the same. Vol 6 examines how much of it has already happened.

1.3 Headline facts

Anki published no service manual for Cozmo, and Digital Dream Labs published none after it. Everything below is drawn either from the vendor’s own materials, from published teardowns, or from the reverse-engineered protocol documentation maintained by the pycozmo project. Each row is marked confirmed where a reachable primary or authoritative source states it, or unverified where it rests on a single secondary source. Figures that no reachable source establishes are left out rather than estimated.

Table 2 — Headline facts

Attribute	Value	Confidence
Released	16 October 2016, United States	confirmed
Launch price	USD 179.99	confirmed
Maker	Anki, then Digital Dream Labs from December 2019	confirmed
Successor	Vector, October 2018	confirmed
Main microcontroller	NXP Kinetis K02, 100 MHz ARM Cortex-M4	confirmed, teardown
Wi-Fi	Espressif ESP8266EX; the robot is the access point	confirmed
Bluetooth	Nordic nRF51822, used for the Power Cubes	confirmed
Camera	320 x 240 greyscale delivered by firmware	confirmed
Camera sensor	reportedly 640 x 480, not exposed by firmware	unverified
Field of view	approximately 60 degrees	confirmed, per-unit calibrated
Display	128 x 64, in-plane-switching LCD panel	confirmed, teardown
Motors	two drive motors, head tilt, lift arm	confirmed
Encoders	magnetic, on the motor shafts, two lobes each	confirmed, teardown
Voice input	none — no microphone array fitted	confirmed
Accessories	three BLE Power Cubes, charging platform	confirmed
Battery life	quoted at around 45 minutes	unverified
Mass and dimensions	not established — see below	not found
Units sold	”hundreds of thousands” by August 2018	confirmed, vendor claim

1.3.1 On the size and weight figures

Cozmo’s mass and dimensions are widely quoted and, as far as this dive could establish, wrongly quoted. Retail listings give figures such as 2.5 by 2.5 by 4.25 inches and weights approaching three pounds; both plainly describe the packaged product, not the robot, since a machine of that footprint could not weigh three pounds. A figure of roughly 363 grams circulates in secondary robot surveys, including the note that seeded this subproject, but no reachable primary source confirms it.

Rather than repeat any of them, this dive treats Cozmo’s mass and dimensions as not established and says so wherever the question arises. An owner with the robot and a kitchen scale can settle it in a minute; that measurement is left as an open item in Vol 8.

1.4 Hardware revisions

Four hardware versions are documented by the community, distinguished chiefly by the power button — a detail that tracks regional certification rather than capability.

Table 3 — Hardware revisions

Version	Period	Distinguishing feature
4	Autumn 2016	no button
5	Autumn 2017	off button, European certification
6	Autumn 2018	off button, Japanese certification
7	Autumn 2019	on/off button

The practical consequence is small but real: the backpack button is reported by pycozmo as supported on version 1.5 hardware and newer, so the oldest units answer a slightly smaller command set. A buyer has no way to determine the version from a typical second-hand listing photograph.

1.5 What the volumes cover

Vol 2 follows Anki from its Carnegie Mellon founding through the 2019 shutdown, the Digital Dream Labs acquisition, the long-delayed “Cozmo 2.0”, and the 2024 action brought by the Pennsylvania Attorney General — the corporate story that Cozmo survived. Vol 3 opens the machine up: the microcontroller, the two radios, the drive train, the camera and the cubes. Vol 4 is the centre of the dive, documenting the robot-and-engine split in detail, including the network protocol that joins them. Vol 5 covers the three ways to program a Cozmo and what each one depends on. Vol 6 addresses the question an owner actually asks — does it still work, and what is likely to break first. Vol 7 surveys the community and the open-source record, which is smaller and quieter than Vector’s and worth being honest about. Vol 8 is the cheatsheet.

Sources

• Wikipedia, “Cozmo” — release date, price, Code Lab, sales claims, the Anki shutdown and the Digital Dream Labs acquisition.
• microcontrollertips.com, “Cozmo Robot, a distant relative of Vector: Teardown” — the Kinetis K02, ESP8266EX, nRF51822, motor and encoder detail.
• iFixit, “Anki Cozmo” device page — display resolution, sensor list, motor count.
• pycozmo documentation (pycozmo.readthedocs.io) — the protocol, the engine-and-robot relationship, hardware versions, and the supported-feature lists.
• touretzkyds/cozmopedia wiki, “camera” — camera resolution, colour handling and field of view.
• Anki and Digital Dream Labs product and support pages, live at anki.bot.