Raspberry Pi connects to Arduino via Bluetooth

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Equipment

• Raspberry Pi third-generation B + version
• Arduino Pro Mini (5v,16mhz) w/atmega328 + Write device (or use other Arduino version)
• Bluetooth HC-06
• Light Emitting Diode One
• 10,000 ohms One
• DuPont Line several

Packages and tools that are required during installation

In a Python environment, using "Import Bluetooth" If you report the error message "Importerror:no module named Bluetooth" indicates that the appropriate package is not installed, perform a command installation.

$ sudo apt-get update$ sudoinstall bluetooth  BlueZ  Python-bluez

Connecting a Bluetooth device (Arduino)

Use the following command to view the configuration information for Bluetooth

$ hciconfig

Use the following command to scan a paired device

$ hcitool Scan

Enter the Bluetooth connection tool

$ bluetoothctl

[NEW] Controller B8: -: eb:d3: A: B0 raspberrypi [default][bluetooth]# agent onagent registered[bluetooth]# default-Agentdefault Agent Request successful//scanning devices that can be paired[bluetooth]# scan on Discovery started[chg] Controller B8: -: eb:d3: A: B0 discovering:yes[new] Devicexx: -: on:Ten:Ten: +hc- .//Connecting Devices[bluetooth]# Pairxx: -: on:Ten:Ten: +attempting to pair withxx: -: on:Ten:Ten: +[CHG] Devicexx: -: on:Ten:Ten: +connected:yesrequest pin code[agent] Enter PIN code:1234[CHG] Devicexx: -: on:Ten:Ten: +UUIDs:00001101-0000- +-8000-00805f9b34fb[chg] Devicexx: -: on:Ten:Ten: +paired:yespairing Successful//to view connected devices[bluetooth]# paired-Devices Devicexx: -: on:Ten:Ten: +hc- .//to delete a device that is already paired[bluetooth]# Removexx: -: on:Ten:Ten: +[DEL] Devicexx: -: on:Ten:Ten: +hc- .Device has been removed

Test to see if you can ping through

sudo xx:+:£ º

Bluetooth devices connected to Arduino

sudo 0 xx:: £º:+ PressCTRL for Hangup

When a Bluetooth device is connected, a virtual file/dev/rfcomm0 for a Bluetooth device is created in the Raspberry Pi "/dev" directory, and the Arduino Bluetooth LED is solid, indicating "connected."

Bluetooth devices that bind Arduino

sudo 0 xx:+:£ º

When a Bluetooth device is bound, the/dev/rfcomm0 file is also created in the Raspberry Pi "/dev" directory, where the Bluetooth indicator of the Arduino is blinking, which means "not connected", and when the Raspberry Pi sends a message to the Bluetooth device, it does the connection operation.

Unbind a Bluetooth device that is already tied to the Arduino

sudo 0 xx:+:£ º

After unbinding the Bluetooth device, the file/dev/rfcomm0 disappears.

Programming programs

• Arduino:

void Setup () {Pinmode (11, OUTPUT); Digitalwrite (11, high); Delay (500); Digitalwrite (11, low); Serial.begin (9600);} void Loop () { while(Serial.available ()) {char C=Serial.read (); Digitalwrite (11, high); Delay (500); Digitalwrite (one, low); //Receive Message light (LED) flash a bitif(c = ='A') {serial.println ("B"); //receive a on return to B}Else{serial.println ("Please input [A]"); //all other characters returned }}}

• Python code:

#Coding=utf-8#Send to ArduinoImportSerialImportSysport="/dev/rfcomm0"Serial= Serial. Serial (port,9600)ifLen (SYS.ARGV) > 1: Sendstr= Sys.argv[1]Else: Sendstr="A"serial.write (SENDSTR) serial.flushinput ()ifSerial.isopen () = =False:serial.open () Line=Serial.readline ()PrintLine

Run Tests

How to test it and not send it.

Raspberry Pi connects to Arduino via Bluetooth