Petoi Programmable Robot Dog & Cat Comparison

Petoi Arduino/ESP32 Robot Comparison By features

They all have 8 limbs. Bittle has 9 movable joints(servos), Nybble has 11 movable joints(servos).
Head movement
- Bittle's head has one servo, enabling the head to move left & right
- Nybble's head has two servos, enabling the head to move left & right, as well as up & down.
Tail movement
- Bittle doesn't have a servo on its tailbone, so it cannot wag its tail
- Nybble has a servo on its tailbone, so it can wag its tail
Nybble's head comes with a pair of ultrasonic sensors, so it has a pair of eyes to sense things. Its head is fully sealed and cannot attach any more sensors
Bittle's mouth can open and clip on a sensor from Petoi Sensor Pack.
Skills
- Bittle can perform backflips and frontflips.
- Nybble cannot backflip, front flip because it's heavier than Bittle with 2 extra servos and has a real tail. The tail may be broken during the process.
They come with gyroscopes, so they can self-right after being upside down.

Feature	Lite Servos	Alloy Servos
Gear material	Plastic	Metal
Motor	Coreless
Overheating Protection	Electronic protection algorithms to prevent overheating
Torque & Power	Standard torque for basic tasks	High torque for heavy loads & complex moves
Shock Bearing Mechanism	Mechanical lock release structure for protection	The alloy material is strong enough to bear shock
Best For	Beginners & intermediate learners	Advanced learners, educators, & researchers
Durability	Lightweight, good for everyday use	Strong alloy build, long-lasting under stress
Use Cases	Coding lessons, classroom projects, and entry to intermediate robotics projects	Advanced robotics, AI applications, and research for challenging tasks