CUCUMBER RIS GRAVITECH ESP32-S2 WIFI DEV BOARD WITH SENSORS

5 min readAug 8, 2020

อันนี้เป็นบทความแรกของผมเลยนะครับ ผมได้ซื้อบอร์ด Cucumber RIS มา แล้วเจ้าบอร์ดนี้มี Sensor 3 ตัวอยู่บนบอร์ด

HTS221 = เซนเซอร์วัดอุณภูมิและความชื้น (Temperature & Humidity)
MPU-6050 = 3-axis Accelerometer & 3-axis Gyroscope
BMP280 = วัดความดันอากาศ (Pressure)

แต่ก็พยายามหาตัวอย่าง code เพื่อจะทำการ verify ว่า Sensor มันทำงานได้หรือ ป่าว ก็หากยากแท้ ในที่สุดก็เจอก็เลย เอามาให้เพื่อนๆคนที่สนใจ เอาไปใช้ในการ verify board และต่อยอดครับ

Code check I2C
กำหนด SCL pin = 40 และ SDA pin = 41 ตาม Cucumber pinout
const int SCLpin = 40;
const int SDApin = 41;

/*
 * Wire — I2C Scanner
 */#include <Wire.h>const int SCLpin = 40;
const int SDApin = 41;void setup()
{
 Serial.begin(115200);
 Serial.println(“I2C Scanner”);
 Serial.println(“SDA Pin = “+String(SDA));
 Serial.println(“SCL Pin = “+String(SCL));
 Wire.begin(SDApin, SCLpin);
}void loop()
{
 byte error, address;
 int nDevices;
 Serial.println(“Scanning…”);
 nDevices = 0;
 for (address = 1; address < 127; address++)
 {
 // The i2c scanner uses the return value of Write.endTransmisstion to see if a device did acknowledge to the address.
 Wire.beginTransmission(address);
 error = Wire.endTransmission();if (error == 0)
 {
 Serial.print(“I2C device found at address 0x”);
 if (address < 16) {
 Serial.print(“0”);
 }
 Serial.print(address, HEX);
 Serial.println(“ !”);
 nDevices++;
 }
 else if (error == 4)
 {
 Serial.print(“Unknown error at address 0x”);
 if (address < 16) {
 Serial.print(“0”);
 }
 Serial.println(address, HEX);
 }
 }
 if (nDevices == 0) {
 Serial.println(“No I2C devices found\n”);
 }
 else {
 Serial.println(“Done.\n”);
 }
 delay(2000);
}

ผลที่ได้ก็จะเห็นว่ามันอ่าน I2C address ออกมาได้ ตรงกับ รูป Cucumber pinout ด้านบน

2. HTS221

ก่อนอื่นก็ลง Library Arduino_HTS221 ปกติเขาจะมีตัวอย่างให้ ผมก็ทำการ modify ตัวอย่างของเขานั้นละครับ โดยการเพิ่ม

const int SCLpin = 40;
const int SDApin = 41;

และเปลี่ยน Wire.begin(); เป็น

Wire.begin(SDApin, SCLpin);

สำหรับ Sensor อื่นที่เหลือ ผมก็ทำเหมือนกันครับ

#include <Arduino.h>
#include <Wire.h>
#include <Arduino_HTS221.h>const int SCLpin = 40;
const int SDApin = 41;void setup()
{
  delay(5000);//Wire.begin();
  Wire.begin(SDApin, SCLpin);
  Serial.begin(9600);
  while (!Serial);if (!HTS.begin()) {
    Serial.println("Failed to initialize humidity temperature sensor!");
    while (1);
  }
}
// the loop function runs over and over again until power down or reset
void loop()
{
  // read all the sensor values
  float temperature = HTS.readTemperature();
  float humidity    = HTS.readHumidity();// print each of the sensor values
  Serial.print("Temperature = ");
  Serial.print(temperature);
  Serial.println(" °C");Serial.print("Humidity    = ");
  Serial.print(humidity);
  Serial.println(" %");// print an empty line
  Serial.println();// wait 1 second to print again
  delay(1000);
}

3. BMP280

ลง Library BMx280MI

#include <Arduino.h>
#include <Wire.h>
#include <BMx280I2C.h>#define I2C_ADDRESS 0x76
const int SCLpin = 40;
const int SDApin = 41;//create a BMx280I2C object using the I2C interface with I2C Address 0x76
BMx280I2C bmx280(I2C_ADDRESS);void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);//wait for serial connection to open (only necessary on some boards)
  while (!Serial);//Wire.begin();
  Wire.begin(SDApin, SCLpin);
  
  //begin() checks the Interface, reads the sensor ID (to differentiate between BMP280 and BME280)
  //and reads compensation parameters.
  if (!bmx280.begin())
  {
    Serial.println("begin() failed. check your BMx280 Interface and I2C Address.");
    while (1);
  }if (bmx280.isBME280())
    Serial.println("sensor is a BME280");
  else
    Serial.println("sensor is a BMP280");//reset sensor to default parameters.
  bmx280.resetToDefaults();//by default sensing is disabled and must be enabled by setting a non-zero
  //oversampling setting.
  //set an oversampling setting for pressure and temperature measurements. 
  bmx280.writeOversamplingPressure(BMx280MI::OSRS_P_x16);
  bmx280.writeOversamplingTemperature(BMx280MI::OSRS_T_x16);//if sensor is a BME280, set an oversampling setting for humidity measurements.
  if (bmx280.isBME280())
    bmx280.writeOversamplingHumidity(BMx280MI::OSRS_H_x16);
}void loop() {
  // put your main code here, to run repeatedly:delay(1000);//start a measurement
  if (!bmx280.measure())
  {
    Serial.println("could not start measurement, is a measurement already running?");
    return;
  }//wait for the measurement to finish
  do
  {
    delay(100);
  } while (!bmx280.hasValue());Serial.print("Pressure: "); Serial.println(bmx280.getPressure());
  Serial.print("Pressure (64 bit): "); Serial.println(bmx280.getPressure64());
  Serial.print("Temperature: "); Serial.println(bmx280.getTemperature());//important: measurement data is read from the sensor in function hasValue() only. 
  //make sure to call get*() functions only after hasValue() has returned true. 
  if (bmx280.isBME280())
  {
    Serial.print("Humidity: "); 
    Serial.println(bmx280.getHumidity());
  }
}

4. MPU6050
ลง Library MPU6050_light

/* Get all possible data from MPU6050
 * Accelerometer values are given as multiple of the gravity [1g = 9.81 m/s²]
 * Gyro values are given in deg/s
 * Angles are given in degrees
 * Note that X and Y are tilt angles and not pitch/roll.
 *
 * License: MIT
 */#include "Wire.h"
#include <MPU6050_light.h>
const int SCLpin = 40;
const int SDApin = 41;MPU6050 mpu(Wire);long timer = 0;void setup() {
  Serial.begin(115200);
  //Wire.begin();
  Wire.begin(SDApin, SCLpin);
  mpu.begin();
  Serial.println(F("Calculating gyro offset, do not move MPU6050"));
  delay(1000);
  mpu.calcGyroOffsets();
  Serial.println("Done!\n");
  
}void loop() {
  mpu.update();if(millis() - timer > 1000){ // print data every second
    Serial.print(F("TEMPERATURE  : "));Serial.println(mpu.getTemp());
    Serial.print(F("ACCELERO   X : "));Serial.print(mpu.getAccX());
    Serial.print("\tY : ");Serial.print(mpu.getAccY());
    Serial.print("\tZ : ");Serial.println(mpu.getAccZ());
  
    Serial.print(F("GYRO       X : "));Serial.print(mpu.getGyroX());
    Serial.print("\tY : ");Serial.print(mpu.getGyroY());
    Serial.print("\tZ : ");Serial.println(mpu.getGyroZ());
  
    Serial.print(F("ACC ANGLE  X : "));Serial.print(mpu.getAccAngleX());
    Serial.print("\tY : ");Serial.println(mpu.getAccAngleY());
    
    Serial.print(F("ANGLE      X : "));Serial.print(mpu.getAngleX());
    Serial.print("\tY : ");Serial.print(mpu.getAngleY());
    Serial.print("\tZ : ");Serial.println(mpu.getAngleZ());
    Serial.println(F("=======================================================\n"));
    timer = millis();
  }}

เท่านี้เราก็ตรวจสอบ sensor ทั้งหมดบนบอร์ด ได้แล้วครับ

แถมอีกหน่อย ในการใช้ Arduino IDE กับ ESP32-S2 ดูได้ที่นี้ครับ ผมลองแล้วใช้ได้.

ESP32-S2 Support

If you want to test ESP32-S2 and/or ESP32-C3 through the board manager, please use the development release link:

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json

CUCUMBER RIS GRAVITECH ESP32-S2 WIFI DEV BOARD WITH SENSORS

ESP32-S2 Support

Written by Sorapong Thuaykaew

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