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I have brought a arduino kit in 2016 but haven’t played with it. Finally have some taste on it.

Install sketch – official software from arduino

Add “Adafruit unified sensor” & SimpleDHT library in sketch, then create a new file.

Code

/* install "Adafruit unified sensor" and simpleDHT library in sketch */
#include <Adafruit_Sensor.h>
#include <DHT.h>

/* Include the software serial port library */
#include <SoftwareSerial.h>
/* to communicate with the Bluetooth module's TXD pin */
#define BT_SERIAL_TX 10
/* to communicate with the Bluetooth module's RXD pin */
#define BT_SERIAL_RX 11
/* Initialise the software serial port */
SoftwareSerial BluetoothSerial(BT_SERIAL_TX, BT_SERIAL_RX);

/*  what digital pin DHT connected to */
#define DHTPIN 7
// Uncomment whatever type you're using!
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  Serial.println("Temperature and Humidity to bluetooth");
  dht.begin();

  BluetoothSerial.begin(9600);
  delay(1000);
  
  // Should respond with OK
  BluetoothSerial.print("AT");
  waitForResponse();
  
  // Should respond with its version
  BluetoothSerial.print("AT+VERSION");
  waitForResponse();
  
  // Set pin to 1234
  BluetoothSerial.print("AT+PIN1234");
  waitForResponse();
  
  // Set the name to BLU
  BluetoothSerial.print("AT+NAMEBLU");
  waitForResponse();

  Serial.println("Finished setup!");
}

void loop() {
  // Give it time to calibrate
  delay(10000);
  
  float h = dht.readHumidity();
  // Read Celsius
  float t = dht.readTemperature();
  // Read Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check errors
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Compute heat index in Fahrenheit (the default)
  // float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  // float hic = dht.computeHeatIndex(t, h, false);

  Serial.println("Humidity: " + String(h) + "%, Temperature: " + String(t) + "^C");
  BluetoothSerial.println("Humidity: " + String(h) + "%, Temperature: " + String(t) + "^C");
}

// Function to pass BlueTooth output through to serial port output
void waitForResponse() {
  delay(1000);
  while (BluetoothSerial.available()) {
    Serial.write(BluetoothSerial.read());
  }
  Serial.write("\n");
}

/* install "Adafruit unified sensor" and simpleDHT library in sketch */

#include <Adafruit_Sensor.h>

#include <DHT.h>

/* Include the software serial port library */

#include <SoftwareSerial.h>

/* to communicate with the Bluetooth module's TXD pin */

#define BT_SERIAL_TX 10

/* to communicate with the Bluetooth module's RXD pin */

#define BT_SERIAL_RX 11

/* Initialise the software serial port */

SoftwareSerial BluetoothSerial(BT_SERIAL_TX, BT_SERIAL_RX);

/* what digital pin DHT connected to */

#define DHTPIN 7

// Uncomment whatever type you're using!

#define DHTTYPE DHT11 // DHT 11

//#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321

//#define DHTTYPE DHT21 // DHT 21 (AM2301)

DHT dht(DHTPIN, DHTTYPE);

void setup() {

Serial.begin(9600);

Serial.println("Temperature and Humidity to bluetooth");

dht.begin();

BluetoothSerial.begin(9600);

delay(1000);

// Should respond with OK

BluetoothSerial.print("AT");

waitForResponse();

// Should respond with its version

BluetoothSerial.print("AT+VERSION");

waitForResponse();

// Set pin to 1234

BluetoothSerial.print("AT+PIN1234");

waitForResponse();

// Set the name to BLU

BluetoothSerial.print("AT+NAMEBLU");

waitForResponse();

Serial.println("Finished setup!");

}

void loop() {

// Give it time to calibrate

delay(10000);

float h = dht.readHumidity();

// Read Celsius

float t = dht.readTemperature();

// Read Fahrenheit (isFahrenheit = true)

float f = dht.readTemperature(true);

// Check errors

if (isnan(h) || isnan(t) || isnan(f)) {

Serial.println("Failed to read from DHT sensor!");

return;

}

// Compute heat index in Fahrenheit (the default)

// float hif = dht.computeHeatIndex(f, h);

// Compute heat index in Celsius (isFahreheit = false)

// float hic = dht.computeHeatIndex(t, h, false);

Serial.println("Humidity: " + String(h) + "%, Temperature: " + String(t) + "^C");

BluetoothSerial.println("Humidity: " + String(h) + "%, Temperature: " + String(t) + "^C");

}

// Function to pass BlueTooth output through to serial port output

void waitForResponse() {

delay(1000);

while (BluetoothSerial.available()) {

Serial.write(BluetoothSerial.read());

}

Serial.write("\n");

}

Verify code, then connect the Ardunio board, and upload the file.

If it failed to upload, disconnect the bluetooth module. sending/receiving bluetooth data may interrupt the code upload.

Now let’s see the value from receiver via bluetooth, the simplest way to connect a android phone. Pair it up by bluetooth, install a terminal app, e.g. Bluetooth Terminal HC-05. (blueTerm does not work for my old GS3)

value will display on screen:

Connections:

reference:

Arduino Bluetooth Wireless Communication

http://www.instructables.com/id/ArduinoAndroid-Bluetooth-HC-06-Module-DHT11-Temp-M/

Infamous Seagate Barracuda 3TB hard disk suddenly dead. Due to physical/raw disk mapping, DSM on ESXi cannot do S.M.A.R.T. test and ESXi does not alert as well….

Anyway, this time forget about ESXi, just install DSM 6.1. Planning to use docker for other applications in future.

For information to install, follow 2 links below

https://xpenology.com/forum/topic/7973-tutorial-installmigrate-dsm-52-to-61x-juns-loader/
https://github.com/XPEnology/JunLoader/wiki/Installing-DSM-6.0-Bare-Metal

Some additional notes:

VID:PID

$ sudo lsusb
Bus 001 Device 003: ID 0781:5576 SanDisk Corp. Cruzer Facet

1 2	$ sudo lsusb Bus 001 Device 003: ID 0781:5576 SanDisk Corp. Cruzer Facet

instead of OSFMount(Windows), edit grub.cfg by linux vm.

cd /mnt/hgfs/vmshare
sudo fdisk -l synoboot.img
## 512 (secotr size?) * 2048 (start)  = 1048576
sudo mount -o rw,loop,offset=1048576 ./synoboot.img /mnt/synoimg
vim /mnt/synoimg/grub/grub.cfg
umount /mnt/synoimg

cd /mnt/hgfs/vmshare

sudo fdisk -l synoboot.img

## 512 (secotr size?) * 2048 (start) = 1048576

sudo mount -o rw,loop,offset=1048576 ./synoboot.img /mnt/synoimg

vim /mnt/synoimg/grub/grub.cfg

umount /mnt/synoimg

HP MicroServer Gen8 has 2 NIC, so put to MAC addresses to grub.cfg as well

After installation completed, go to HP PS1810 switch webpage,
Trunks > Trunk Configuration
select “LCAP Active” and 2 ports for bonding

In DSM, control panel > networking > Network interface >
create “bond”, select IEEE 8022.3ad Dynamic link aggregation.

Arduino temperature and bluetooth wireless communication

Raspberry Pi Zero W wifi and keyboard

XPEnology DSM 6.1

May 2025
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