Example Code for Arduino - Setting the UART Baud Rate

Hardware Preparation

• Gravity: AI Posture and Gesture Sensor (SKU: SEN0670) ×1
• FireBeetle 2 ESP32‑E (SKU: DFR0654)
• USB Type‑C cable ×1
• PC ×1

Software Preparation

• Programming environment: Click to download Arduino IDE
• Download and install the sensor library: DFRobot_HumanPose
• Please click here to view: How to install a library?

Wiring Diagram

UART Connection

Connection Description:

Note:

• The default communication method of the sensor is I²C. If you need to switch to UART, use the on‑board DIP switch to change the communication method.
• After switching, the sensor must be powered off and on again for the change to take effect.

Sample Code

**Function: **This example uses the sensor's default initial baud rate of 9600 to establish device connection, allowing one‑click modification and permanent saving of the sensor's UART serial communication baud rate to accommodate different data transmission requirements.

#include <DFRobot_HumanPose.h>

// ESP32 hardware serial 1: RX=25, TX=26, sensor default baud rate 9600
DFRobot_HumanPose_UART humanPose(&Serial1, 9600, 25, 26);

void setup() {
  Serial.begin(115200);
  Serial1.begin(9600);
  delay(100);

  while (!humanPose.begin()) {
    Serial.println("Connection failed...");
    delay(1000);
  }
  Serial.println("Connection successful!");

  // Change baud rate to 115200
  humanPose.setBaud(DFRobot_HumanPose_UART::eBaud_115200);
  Serial.println("✅ Baud rate successfully changed to 115200!");
}

void loop() {
}

Result:

The serial monitor prints a success message indicating that the baud rate has been changed. Please restart the sensor for the change to take effect.