ESP32 KY-052 Pressure and Temperature Sensor Module

🛠️ KY-052 Pressure and Temperature Sensor Module Troubleshooting

This guide outlines a systematic approach to troubleshoot and resolve common problems with the . Start by confirming that the hardware connections are correct, as wiring mistakes are the most frequent cause of issues. If you are sure the connections are correct, follow the below steps to debug common issues.

❌ Sensor Not Responding

🌡️ Incorrect Temperature or Pressure Readings

💻 Code Examples

Below you can find code examples of KY-052 Pressure and Temperature Sensor Module with ESP32 in several frameworks:

• Arduino IDE
• ESP-IDF
• ESPHome
• PlatformIO
• MicroPython

If you encounter issues while using the KY-052 Pressure and Temperature Sensor Module, check the Common Issues Troubleshooting Guide.

ESP32 KY-052 Arduino IDE Code Example

Example in Arduino IDE

Fill in your main Arduino IDE sketch file with the following code to use the KY-052 Pressure and Temperature Sensor Module:

#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
    Serial.begin(9600);
    if (!bmp.begin()) {
        Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));
        while (1);
    }
}

void loop() {
    Serial.print(F("Temperature = "));
    Serial.print(bmp.readTemperature());
    Serial.println(" °C");

    Serial.print(F("Pressure = "));
    Serial.print(bmp.readPressure());
    Serial.println(" Pa");

    Serial.print(F("Altitude = "));
    Serial.print(bmp.readAltitude(1013.25)); // Adjust to local sea level pressure
    Serial.println(" m");

    delay(2000);
}

This Arduino code initializes the BMP280 sensor and reads temperature, pressure, and altitude data. The altitude calculation requires adjusting the sea level pressure value (1013.25 hPa) to your local value for accurate readings. The sensor data is printed to the serial monitor every 2 seconds.

Connect your ESP32 to your computer via a USB cable, Ensure the correct Board and Port are selected under Tools, Click the "Upload" button in the Arduino IDE to compile and upload the code to your ESP32.

ESP32 KY-052 ESP-IDF Code Example

Example in Espressif IoT Framework (ESP-IDF)

If you're using ESP-IDF to work with the KY-052 Pressure and Temperature Sensor Module, here's how you can set it up and read data from the sensor. Fill in this code in the main ESP-IDF file:

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/i2c.h"
#include "bmp280.h"

#define I2C_MASTER_SCL_IO 22
#define I2C_MASTER_SDA_IO 21
#define I2C_MASTER_NUM I2C_NUM_0
#define I2C_MASTER_FREQ_HZ 100000

void app_main() {
    printf("Initializing BMP280 sensor...\n");
    bmp280_t bmp;
    bmp280_params_t params;
    bmp280_init_default_params(&params);
    i2cdev_init();

    if (bmp280_init_desc(&bmp, BMP280_I2C_ADDRESS_0, I2C_MASTER_NUM, I2C_MASTER_SDA_IO, I2C_MASTER_SCL_IO) != ESP_OK ||
        bmp280_init(&bmp, &params) != ESP_OK) {
        printf("BMP280 sensor initialization failed!\n");
        return;
    }

    while (1) {
        float temperature, pressure, altitude;
        if (bmp280_read_float(&bmp, &temperature, &pressure, &altitude) == ESP_OK) {
            printf("Temperature: %.2f°C, Pressure: %.2f hPa, Altitude: %.2f m\n", temperature, pressure / 100.0, altitude);
        } else {
            printf("Failed to read data from BMP280\n");
        }
        vTaskDelay(pdMS_TO_TICKS(2000));
    }
}

This ESP-IDF code initializes the BMP280 sensor using the I2C interface on GPIO21 (SDA) and GPIO22 (SCL). It reads temperature, pressure, and altitude values and prints them to the console every 2 seconds.

Update the I2C pins (I2C_MASTER_SDA_IO and I2C_MASTER_SCL_IO) to match your ESP32 hardware setup, Use idf.py build to compile the project, Use idf.py flash to upload the code to your ESP32.

ESP32 KY-052 ESPHome Code Example

Example in ESPHome (Home Assistant)

Fill in this configuration in your ESPHome YAML configuration file (example.yml) to integrate the KY-052 Pressure and Temperature Sensor Module

sensor:
  - platform: bmp280
    temperature:
      name: "KY-052 Temperature"
    pressure:
      name: "KY-052 Pressure"
    address: 0x76
    update_interval: 2s

This ESPHome configuration sets up the KY-052 sensor (BMP280) to read temperature and pressure data via I2C with an update interval of 2 seconds.

Upload this code to your ESP32 using the ESPHome dashboard or the esphome run command.

ESP32 KY-052 PlatformIO Code Example

Example in PlatformIO Framework

For PlatformIO, make sure to configure the platformio.ini file with the appropriate environment and libraries, and then proceed with the code.

Configure platformio.ini

First, your platformio.ini should look like below. You might need to include some libraries as shown. Make sure to change the board to your ESP32:

[env:esp32]
platform = espressif32
board = esp32dev
framework = arduino
lib_deps =
    adafruit/Adafruit BMP280 Library
    adafruit/Adafruit Unified Sensor

ESP32 KY-052 PlatformIO Example Code

Write this code in your PlatformIO project under the src/main.cpp file to use the KY-052 Pressure and Temperature Sensor Module:

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_BMP280.h>

Adafruit_BMP280 bmp;

void setup() {
    Serial.begin(115200);
    if (!bmp.begin(0x76)) {
        Serial.println("Could not find a valid BMP280 sensor, check wiring!");
        while (1);
    }
}

void loop() {
    Serial.print("Temperature = ");
    Serial.print(bmp.readTemperature());
    Serial.println(" °C");

    Serial.print("Pressure = ");
    Serial.print(bmp.readPressure() / 100.0);
    Serial.println(" hPa");

    Serial.print("Altitude = ");
    Serial.print(bmp.readAltitude(1013.25)); // Adjust sea level pressure
    Serial.println(" m");

    delay(2000);
}

This PlatformIO code configures the KY-052 sensor (BMP280) for temperature, pressure, and altitude measurement using I2C communication. It reads data every 2 seconds and prints it to the serial monitor.

Upload the code to your ESP32 using the PlatformIO "Upload" button in your IDE or the pio run --target upload command.

ESP32 KY-052 MicroPython Code Example

Example in Micro Python Framework

Fill in this script in your MicroPython main.py file (main.py) to integrate the KY-052 Pressure and Temperature Sensor Module with your ESP32.

from machine import Pin, I2C
import time
import bmp280

i2c = I2C(0, scl=Pin(22), sda=Pin(21))
sensor = bmp280.BMP280(i2c)

while True:
    temperature = sensor.temperature
    pressure = sensor.pressure
    altitude = sensor.altitude
    print("Temperature:", temperature, "°C", "Pressure:", pressure, "hPa", "Altitude:", altitude, "m")
    time.sleep(2)

This MicroPython script configures the KY-052 sensor (BMP280) using I2C on GPIO21 (SDA) and GPIO22 (SCL). It continuously reads temperature, pressure, and altitude and prints the values every 2 seconds.

Upload this code to your ESP32 using a MicroPython-compatible IDE, such as Thonny, uPyCraft, or tools like ampy.