Features

• 3 × 180° micro servos for expressive motion
• Interchangeable tops: Distance / Lighthouse
• Ultrasonic sensing to ~4 m
• Magnetic base (HexLab™ compatible)
• ESP8266 + Thonny (MicroPython) & Arduino®

Requirements

• Microcontroller with GPIO + 5 V power
• Servos: 5 V, GND, Signal
• HC-SR04: 5 V, GND, Trig, Echo
• Thonny (ESP8266) or Arduino IDE

Contents

• RoboBuddy™ (3 × MG90S or compatible; 8 × 3D printed parts)
• HC-SR04 Ultrasonic (plus 1 spare)
• Lighthouse Attachment (LED + rotating mount)
• HexLink™ Control Board (WeMos D1 mini ESP8266, headers, dual base)
• Magnets, breadboard, jumpers, LED + 220 Ω, USB cable

Thonny (ESP8266) Setup

• Thonny → Tools → Options → Interpreter → MicroPython (ESP8266)
• Select the Port; install/update firmware if needed
• Save your script as main.py to auto-run

MicroPython — LED Blink (GPIO14 = D5)

from machine import Pin
import time
led = Pin(14, Pin.OUT)   # D5
while True:
    led.value(1)         # ON
    time.sleep(0.5)
    led.value(0)         # OFF
    time.sleep(0.5)

Arduino — LED Blink (D5)

const int LED = 5;
void setup(){ pinMode(LED, OUTPUT); }
void loop(){
  digitalWrite(LED, HIGH); delay(500);
  digitalWrite(LED, LOW);  delay(500);
}

Thonny Recommended. WeMos D1 mini (ESP8266), labeled headers, magnetic base, translucent breadboard.

USB-C powered; supports MicroPython (Thonny) & Arduino IDE; compatible with official WeMos shields.

Features

• ESP8266 Wi-Fi® microcontroller with MicroPython & Arduino support
• 17×10-pin breadboard + clearly labeled header rows
• No-solder learning path; plug-and-play LEDs & sensors
• Magnetic HexLab™ base to secure projects
• Colorways: Storm Blue · Neutron White · Space Black · Ever Green · Candy Red · Silver Bells

Pin Quick Reference

• D4 → GPIO2 (onboard LED, active-low)
• D5 → GPIO14 · D6 → GPIO12 · D7 → GPIO13
• A0 → Analog in (≤ 3.2 V)
• 5 V rail for servos/sensors; GND common

MicroPython — Onboard LED (GPIO2)

from machine import Pin
import time
led = Pin(2, Pin.OUT)    # D4 (active-low LED)
while True:
  led.value(0)           # ON
  time.sleep(0.5)
  led.value(1)           # OFF
  time.sleep(0.5)

Arduino — External LED (D5)

const int LED = 5;
void setup(){ pinMode(LED, OUTPUT); }
void loop(){
  digitalWrite(LED, HIGH); delay(500);
  digitalWrite(LED, LOW);  delay(500);
}

Standalone kit to build, program, and test RoboBuddy™. Modular tops; classroom-friendly; demo-ready.

Features

• 3 × 180° micro servos (MG90S compatible)
• Swappable tops: Distance (HC-SR04) / Lighthouse
• Programmable reactions via MicroPython (Thonny) or Arduino
• Magnetic HexLab™ base; quick teardown for lessons

Pin Map (ESP8266)

• Servos → GPIO14 / GPIO12 / GPIO13 (D5 / D6 / D7)
• HC-SR04 → Trig = GPIO12 (D6), Echo = GPIO13 (D7)
• A0 available for analog experiments (≤ 3.2 V)

MicroPython — Servo Sweep (GPIO14)

from machine import Pin, PWM
import time
servo = PWM(Pin(14), freq=50)   # D5
left, right, center = 26, 128, 77
while True:
    servo.duty(left);  time.sleep(0.6)
    servo.duty(right); time.sleep(0.6)
    servo.duty(center);time.sleep(0.6)

Arduino — Servo Sweep (D5)

#include 
Servo s;
void setup(){ s.attach(5); }   // D5
void loop(){
  s.write(0);   delay(600);
  s.write(180); delay(600);
  s.write(90);  delay(600);
}