Example Code for Arduino - Sleep and Wake-up

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

I²C Connection (The following examples all use I²C communication)

Connection Description:

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

Example Code: Control the WAKEUP pin of the sensor to achieve low‑power sleep and wake‑up.

// Sensor EN/WAKE pin connected to ESP32-E pin D7
const int WAKEUP_PIN = D7;

void setup() {
  Serial.begin(115200);
  pinMode(WAKEUP_PIN, OUTPUT);  // Set as output mode
}

void loop() {
  // 1. Sensor sleep (low power)
  digitalWrite(WAKEUP_PIN, LOW);
  Serial.println("Sensor is sleeping → Low power mode");
  delay(3000);  // Keep sleeping for 3 seconds

  // 2. Sensor wake‑up
  digitalWrite(WAKEUP_PIN, HIGH);
  Serial.println("Sensor is awake → Normal operation");
  delay(5000);  // Keep working for 5 seconds
}

Result:

From the serial output, you can see the sensor switching between operating states according to the set timing.