I'm tryting to connect with raspberry pi 4(64-bit os) and ardinuo uno R3 using HM-10 bluetooth moudle.
I followed the procedure and made a Bluetooth connection between the two, but there was a problem when I tried to communicate data exchange. I tried many ways, but it was unsuccessful, so I'm asking for help.
The Bluetooth module and Raspberry Pi are connected, there is no problem with the circuit, and even communication is possible between the mobile phone and Arduino's Bluetooth module. However, I don't know why an error occurs when I try to communicate with Raspberry Pi.
Number one is code.
Number two is about the error.
Number three is the list I've tried.
1-1. arduino code1-2. raspberry pi code. (using python3.8)2. error3-1. edit bluetooth service file: for use D-bus3-2. Bluetooth Authorization3-3. trying to use rfcomm port
I followed the procedure and made a Bluetooth connection between the two, but there was a problem when I tried to communicate data exchange. I tried many ways, but it was unsuccessful, so I'm asking for help.
The Bluetooth module and Raspberry Pi are connected, there is no problem with the circuit, and even communication is possible between the mobile phone and Arduino's Bluetooth module. However, I don't know why an error occurs when I try to communicate with Raspberry Pi.
Number one is code.
Number two is about the error.
Number three is the list I've tried.
1-1. arduino code
Code:
import bluetoothserver_socket=bluetooth.BluetoothSocket( bluetooth.RFCOMM )port = 1server_socket.bind(("",port))server_socket.listen(1)client_socket,address = server_socket.accept()print("Accepted connection from ",address)while 1: data = client_socket.recv(1024) print("Received: %s" % data) if (data == "q"): print ("Quit") breakclient_socket.close()server_socket.close()Code:
from bluetooth import *client_socket=BluetoothSocket( RFCOMM )client_socket.connect(("34:15:13:88:77:45", 1))print("bluetooth Connected!")msg = input("send message : ")client_socket.send(msg)print("Finished")client_socket.close()Code:
(myenv) cuk24@raspberrypi:~/2024prj/ardtest $ python3 bluet.py Traceback (most recent call last): File "<string>", line 3, in connect_bluetooth.error: (112, 'Host is down')During handling of the above exception, another exception occurred:Traceback (most recent call last): File "bluet.py", line 4, in <module> socket.connect(("34:15:13:88:77:45", 1)) File "<string>", line 5, in connectbluetooth.btcommon.BluetoothError: [Errno 112] Host is downCode:
# 블루투스 서비스 파일 열기sudo nano /lib/systemd/system/bluetooth.service# ExecStart 줄 찾아서 수정하기ExecStart=/usr/lib/bluetooth/bluetoothd --experimental# 변경 사항 적용, 블루투스 서비스 재시작sudo systemctl daemon-reloadsudo systemctl restart bluetoothCode:
sudo usermod -a -G bluetooth cuk24Code:
rfcommsudo rfcomm release 0sudo rfcomm bind 0 34:15:13:88:77:45 1Statistics: Posted by gamjar — Fri May 10, 2024 6:42 am — Replies 0 — Views 5
