Seeed studio

Seeed Studio is a hardware innovation platform that provides open-source electronic modules, development boards, and IoT solutions. It offers products like Seeeduino (Arduino-compatible boards), Grove sensors, XIAO microcontrollers, and Edge AI solutions. Known for its rapid prototyping, industrial IoT, and AI hardware, Seeed Studio supports makers, students, and engineers in building embedded systems and smart devices.

Furthermore, I explored this in greater depth and practiced working with it.

XIAO-ESP32-C3

The Seeed Studio XIAO ESP32-C3 is a compact Wi-Fi + Bluetooth 5 (BLE) microcontroller based on the ESP32-C3 (RISC-V single-core CPU @160 MHz). It features 4 MB Flash, 400 KB SRAM, and supports GPIO, ADC, PWM, UART, SPI, and I2C. With its small size (21×17.5 mm), low power consumption, and Type-C USB, it is ideal for IoT, wearables, and edge computing applications.

Specification

• Architecture: 32-bit RISC-V (single-core)

• Architecture: 32-bit RISC-V (single-core)

• Clock Speed: Up to 160 MHz

• Flash Memory: 4 MB

• SRAM: 400 KB

• GPIO Pins: 11 I/O pins (supports ADC, PWM, I2C, SPI, UART)

• Wireless Connectivity: Wi-Fi (802.11 b/g/n, 2.4 GHz), Bluetooth 5 (BLE)

• USB Interface: USB Type-C (native)

• Operating Voltage: 3.3V

• Dimensions: 21 × 17.5 mm

Datasheet

Image source

Wi-Fi and Bluetooth Low Energy (BLE)

USB Serial/JTAG Controller

GPIO Matrix and Peripheral Routing

Security Features

Low-Power Features

I2C communication

To program a physical development board using an embedded programming language to communicate and interact with devices, I plan to do by using the potentiometer control the moverment of the Motor.

For this I used I2C communication between two microcontrollers.

I took the Arduino UNo and Xiao nrf52840 microcontrollers, here the Arduino Uno acts as the MASTER device and the Seeed Studio XIAO nRF52840 acts as the SLAVE device.
The potentiometer is connected with Arduino UNO and the MG996R is connected with XIAO nRF52840.
When I rotate the potentiometer knob, the Arduino reads the analog value from it. The potentiometer gives values from 0 to 1023.
In I2C communication: 1.SDA line is used for data transfer 2.SCL line is used for clock synchronization

Arduino UNO code

#include <Wire.h>
void setup() {
  Wire.begin(); // Master
}
void loop() {
  int potValue = analogRead(A0);
  byte angle = map(potValue, 0, 1023, 0, 180);
  Wire.beginTransmission(8); // Slave address
  Wire.write(angle);
  Wire.endTransmission();
  delay(20);
}

• #include <Wire.h> is used to include the I2C communication library.

• Wire.begin(); initializes the Arduino for I2C communication as Master.

• The potentiometer gives values between 0 to 1023.

• Wire.beginTransmission(8) starts communication with the XIAO board having slave address 8.

• Wire.write(angle) sends the angle value through I2C communication.

• Wire.endTransmission() stops the data transmission process.

Xiao-nRF52840 code

#include <Wire.h>
#include <Servo.h>

Servo myServo;

volatile int receivedAngle = 0;

void receiveEvent(int howMany) {

  while (Wire.available()) {
    receivedAngle = Wire.read();
  }
}

void setup() {

  myServo.attach(D2);

  Wire.begin(8); // Slave address

  Wire.onReceive(receiveEvent);
}

void loop() {

  myServo.write(receivedAngle);

  delay(10);
}
}

• #include <Servo.h> is used to control the MG996R.

• Servo myServo; creates a servo motor object for controlling the servo.

• myServo.attach(D2); connects the servo signal wire to pin D2.

• Wire.begin(8); initializes the XIAO board as SLAVE with address 8.

• Wire.onReceive(receiveEvent); calls the receiveEvent() function whenever data comes from Arduino.

• myServo.write(receivedAngle); rotates the servo motor according to the received angle value.

Datasheet acknowledgement