Cant Connect Unless In Debug Mode

[Vindomire]

If i enable the full debug it will connect and read as expected but when disable the debug it wont connect.

I am using:

def new_rpm(r):
print(r.value)

connection = obd.Async("\.\COM5")
connection.watch(obd.commands.RPM, callback=new_rpm)
connection.start()

Without obd.logger.setLevel(obd.logging.DEBUG):
[obd.elm327] ATH1 did not return 'OK', or echoing is still ON
[obd.obd] Cannot load commands: No connection to car
[obd.obd] 'b'010C': Engine RPM' is not supported

With obd.logger.setLevel(obd.logging.DEBUG):
[obd.obd] ======================= python-OBD (v0.7.1) =======================
[obd.obd] Explicit port defined
[obd.elm327] Initializing ELM327: PORT=.\COM5 BAUD=auto PROTOCOL=auto
[obd.elm327] Response from baud 38400: b'\r\rELM327 v1.5\r\r>\r>'
[obd.elm327] Choosing baud 38400
[obd.elm327] write: b'ATZ\r'
[obd.elm327] wait: 1 seconds
[obd.elm327] read: b'\r\rELM327 v1.5\r\r>'
[obd.elm327] write: b'ATE0\r'
[obd.elm327] read: b'OK\r'
[obd.elm327] write: b'ATH1\r'
[obd.elm327] read: b'OK\r\r>'
[obd.elm327] write: b'ATL0\r'
[obd.elm327] read: b'OK\r\r>'
[obd.elm327] write: b'AT RV\r'
[obd.elm327] read: b'13.4V\r\r>'
[obd.elm327] write: b'ATSP0\r'
[obd.elm327] read: b'OK\r\r>'
[obd.elm327] write: b'0100\r'
[obd.elm327] read: b'SEARCHING...\r7EA 06 41 00 98 3A 80 13 \r7E8 06 41 00 BE 3F A8 13 \r\r>'
[obd.elm327] write: b'ATDPN\r'
[obd.elm327] read: b'A6\r\r>'
[obd.protocols.protocol] map ECU 0 --> ENGINE
[obd.protocols.protocol] map ECU 2 --> UNKNOWN
[obd.elm327] Connected Successfully: PORT=.\COM5 BAUD=38400 PROTOCOL=6
[obd.obd] querying for supported commands
[obd.obd] Sending command: b'0100': Supported PIDs [01-20]
[obd.elm327] write: b'0100\r'
[obd.elm327] read: b'7EA 06 41 00 98 3A 80 13 \r7E8 06 41 00 BE 3F A8 13 \r\r>'
[obd.obd] Sending command: b'0120': Supported PIDs [21-40]
[obd.elm327] write: b'0120\r'
[obd.elm327] read: b'7EA 06 41 20 80 01 A0 01 \r7E8 06 41 20 90 15 B0 15 \r\r>'
[obd.obd] Sending command: b'0140': Supported PIDs [41-60]
[obd.elm327] write: b'0140\r'
[obd.elm327] read: b'7EA 06 41 40 44 CC 00 21 \r7E8 06 41 40 7A 1C 80 00 \r\r>'
[obd.obd] Sending command: b'0600': Supported MIDs [01-20]
[obd.elm327] write: b'0600\r'
[obd.elm327] read: b'7E8 06 46 00 C0 00 00 01 \r\r>'
[obd.obd] Sending command: b'0620': Supported MIDs [21-40]
[obd.elm327] write: b'0620\r'
[obd.elm327] read: b'7E8 06 46 20 80 00 80 01 \r\r>'
[obd.obd] Sending command: b'0640': Supported MIDs [41-60]
[obd.elm327] write: b'0640\r'
[obd.elm327] read: b'7E8 06 46 40 00 00 00 01 \r\r>'
[obd.obd] Sending command: b'0660': Supported MIDs [61-80]
[obd.elm327] write: b'0660\r'
[obd.elm327] read: b'7E8 06 46 60 00 00 00 01 \r\r>'
[obd.obd] Sending command: b'0680': Supported MIDs [81-A0]
[obd.elm327] write: b'0680\r'
[obd.elm327] read: b'7E8 06 46 80 00 00 00 01 \r\r>'
[obd.obd] Sending command: b'06A0': Supported MIDs [A1-C0]
[obd.elm327] write: b'06A0\r'
[obd.elm327] read: b'7E8 06 46 A0 F8 00 00 00 \r\r>'
[obd.obd] finished querying with 97 commands supported
[obd.obd] ===================================================================
[obd.asynchronous] Watching command: b'010C': Engine RPM
[obd.asynchronous] subscribing callback for command: b'010C': Engine RPM
[obd.asynchronous] Starting async thread
[obd.obd] Sending command: b'010C': Engine RPM
[obd.elm327] write: b'010C\r'
[obd.elm327] read: b'1334\r\r>'

[tpchuckles]

I'm seeing the same thing. below is the relevant portion of my code (edited for brevity, let me know and i can share the rest). with line 3 commented, i get an error, uncommented it connects and works fine.

Raspberry Pi Zero W with Raspbian, using python3.7, python-OBD 0.7.1, connecting to a cheapo bluetooth ELM327 reader i got off ebay (which works flawlessly with my android phone with the CarBit app).

> 
def OBD2():
	import obd,os,time
	#obd.logger.setLevel(obd.logging.DEBUG)
	os.system("sudo sdptool add SP")				# set up serial port using linux's sdptool
	time.sleep(5)							# sdptool returns before port fully set up? so wait a jiff
	os.system("sudo rfcomm connect hci0 AA:BB:CC:11:22:33 1 &")	# connect using OBD2 unit's mac address. rfcomm locks, so detach(using "&")
	time.sleep(5)							# since we detached, we again need to wait a jiff for it to connect

	connection=obd.OBD(fast=False,timeout=30)

the error i get is:

[obd.elm327] ATH1 did not return 'OK', or echoing is still ON
[obd.obd] Cannot load commands: No connection to car

ps: if anyone has tips on getting rid of the (incredibly janky) os.system calls, i'd love to hear it

EDIT: is this a duplicate of #186 ?