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brendan-w / python-OBD

OBD-II serial module for reading engine data
GNU General Public License v2.0
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Everything connected but no data #205

Closed zeesh1979 closed 3 years ago

zeesh1979 commented 3 years ago

Hi, Please check as I made a very simple script to get RPM and Speed

import obd import time from obd import OBDStatus conn=obd.OBD(fast=False,check_voltage=False) //made check voltage false as sometimes i was getting Ignition off reply even though my car was running time.sleep(5) print("elm",OBDStatus.ELM_CONNECTED) print("obd",OBDStatus.OBD_CONNECTED) print("car",OBDStatus.CAR_CONNECTED) time.sleep(5) print(obd.commands.has_command(obd.commands.SPEED)) print(obd.commands.has_command(obd.commands.RPM)) cmd1=obd.commands.SPEED cmd2=obd.commands.RPM while(1): resp=conn.query(cmd1,force=True) print("speed val") print(resp.value) resp=conn.query(cmd2,force=True) print("rpm val") print(resp.value) I get Connected status for ELM, OBD and Car. I also get True for both commands available check. but the commands return nothing and i get None for each. i even increase car RPM by pressing the accelerator (car in parked state and engine running) I connected my OBD with android phone and used the famous Torque app and i am getting all values

zeesh1979 commented 3 years ago

Screenshot 2020-10-21 153442 I am using this OBD module from https://www.banggood.com/IMars-ELM327-bluetooth-Car-OBD2-Scanner-Diagnostic-Tool-Engine-Code-Reader-p-913030.html?rmmds=search&cur_warehouse=CN

zeesh1979 commented 3 years ago

just now i ran the deubg with below output. unable to understand where is the issue

obd.obd] ======================= python-OBD (v0.7.1) ======================= [obd.obd] Using scan_serial to select port [obd.obd] Available ports: ['/dev/rfcomm0'] [obd.obd] Attempting to use port: /dev/rfcomm0 [obd.elm327] Initializing ELM327: PORT=/dev/rfcomm0 BAUD=auto PROTOCOL=auto [obd.elm327] Response from baud 38400: b'?\r\r>' [obd.elm327] Choosing baud 38400 [obd.elm327] write: b'ATZ\r' [obd.elm327] wait: 1 seconds [obd.elm327] read: b'\xfc\r\rELM327 v1.5\r\r>' [obd.elm327] write: b'ATE0\r' [obd.elm327] read: b'ATE0\rOK' [obd.elm327] write: b'ATH1\r' [obd.elm327] read: b'OK' [obd.elm327] write: b'ATL0\r' [obd.elm327] read: b'OK\r' [obd.elm327] write: b'ATSP0\r' [obd.elm327] read: b'OK' [obd.elm327] write: b'0100\r' [obd.elm327] read: b'\r\r>' [obd.elm327] write: b'ATDPN\r' [obd.elm327] read: b'A0\r\r>' [obd.elm327] ELM responded with unknown protocol. Trying them one-by-one [obd.elm327] write: b'ATTP6\r' [obd.elm327] read: b'OK\r\r' [obd.elm327] write: b'0100\r' [obd.elm327] read: b'NO DATA\r\r>' [obd.elm327] Connected Successfully: PORT=/dev/rfcomm0 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'NO DATA\r\r>' [obd.OBDCommand] b'0100': Supported PIDs [01-20] did not receive any acceptable messages [obd.obd] No valid data for PID listing command: b'0100': Supported PIDs [01-20] [obd.obd] Sending command: b'0600': Supported MIDs [01-20] [obd.elm327] write: b'0600\r' [obd.elm327] read: b'NO DATA\r\r>' [obd.obd] finished querying with 7 commands supported [obd.obd] ===================================================================

alistair23 commented 3 years ago

There is no ELM327 v1.5 you are using a knock off ELM327 chip. We don't support knock off chips, as it's possible it doesn't match the ELM spec.

I would try specifying the protocol your car uses manually, maybe that will help.

zeesh1979 commented 3 years ago

thanks. how can i manually specify the protocol?i did soem search and found out that Honda Civic uses CAN 29bit protocol. how to specify this connect command?

From: Alistair Francis notifications@github.com Sent: Wednesday, October 21, 2020 8:52 PM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

There is no ELM327 v1.5 you are using a knock off ELM327 chip. We don't support knock off chips, as it's possible it doesn't match the ELM spec.

I would try specifying the protocol your car uses manually, maybe that will help.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-713748925, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4FZGVA7DQ4O77EEYJDSL4NV5ANCNFSM4SZW2GSQ.

zeesh1979 commented 3 years ago

also can u recommend some good (a bit cheaper) adapter that is compatible with this package?

From: Alistair Francis notifications@github.com Sent: Wednesday, October 21, 2020 8:52 PM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

There is no ELM327 v1.5 you are using a knock off ELM327 chip. We don't support knock off chips, as it's possible it doesn't match the ELM spec.

I would try specifying the protocol your car uses manually, maybe that will help.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-713748925, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4FZGVA7DQ4O77EEYJDSL4NV5ANCNFSM4SZW2GSQ.

alistair23 commented 3 years ago

Just specify protocol=x when starting OBD. The documentation describes the different options: https://python-obd.readthedocs.io/en/latest/Connections/#protocol_id

alistair23 commented 3 years ago

I don't have a recommendation for a OBD connector. I designed my own with a official ELM327 chip.

SparkFun have one that uses the STN1110 chip instead. This library works with that as well (as it's ELM compliant).

zeesh1979 commented 3 years ago

Thanks and how about syntax to do manual protocol setting in obd connect?

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From: Alistair Francis notifications@github.com Sent: Thursday, October 22, 2020 2:57:52 AM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

I don't have a recommendation for a OBD connector. I designed my own with a official ELM327 chip.

SparkFunhttps://www.sparkfun.com/products/9555 have one that uses the STN1110 chip instead. This library works with that as well (as it's ELM compliant).

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-714017552, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4GBBQ3LWDEN56VQYF3SL5YQBANCNFSM4SZW2GSQ.

zeesh1979 commented 3 years ago

thanks

From: Alistair Francis notifications@github.com Sent: Thursday, October 22, 2020 2:56 AM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

Just specify protocol=x when starting OBD. The documentation describes the different options: https://python-obd.readthedocs.io/en/latest/Connections/#protocol_id

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-714016301, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4CVKBWW3DEJVXPQACDSL5YJFANCNFSM4SZW2GSQ.

zeesh1979 commented 3 years ago

one last question hopefully :) please check the logs that i also attached in raising issue. if you see yellow highlighted line, it forces manual protocol setting and gets success at 6 (ISO_15765_4_11bit_500k). shouldnt this mean that my adapter has responded well and next all commands will be sent via this protocol?orange highlighted checking supported commands and it returns no data...if package is communicating with right protocol, i.e. 6, then it should be ok. i was thinking if in my code i do manual protocol set as you suggested even then this will not work. regarding elm versions, i checked on many websites like aliexpress,banggood etc all of them saying v1.5

https://www.banggood.com/search/elm32.html https://www.aliexpress.com/af/elm327.html?d=y&origin=n&SearchText=elm327&catId=0&initiative_id=SB_20201021232046

[obd.elm327] ELM responded with unknown protocol. Trying them one-by-one [obd.elm327] write: b'ATTP6\r' [obd.elm327] read: b'OK\r\r' [obd.elm327] write: b'0100\r' [obd.elm327] read: b'NO DATA\r\r>' [obd.elm327] Connected Successfully: PORT=/dev/rfcomm0 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'NO DATA\r\r>' [obd.OBDCommand] b'0100': Supported PIDs [01-20] did not receive any acceptable messages [obd.obd] No valid data for PID listing command: b'0100': Supported PIDs [01-20] [obd.obd] Sending command: b'0600': Supported MIDs [01-20] [obd.elm327] write: b'0600\r' [obd.elm327] read: b'NO DATA\r\r>'

From: Alistair Francis notifications@github.com Sent: Thursday, October 22, 2020 2:57 AM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

I don't have a recommendation for a OBD connector. I designed my own with a official ELM327 chip.

SparkFunhttps://www.sparkfun.com/products/9555 have one that uses the STN1110 chip instead. This library works with that as well (as it's ELM compliant).

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-714017552, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4GBBQ3LWDEN56VQYF3SL5YQBANCNFSM4SZW2GSQ.

alistair23 commented 3 years ago

I have seen cases where Python-OBD sometimes guesses the wrong protocol. From memory I have only seen this when there is a hardware error, but with a knock-off adapter it's hard to know.

zeesh1979 commented 3 years ago

i installed a terminal device and sent some text commands. it well responded. attached are the logs. can this help me customize ur package for my knocked off obd? i see it responded to speed, rpm commands as well as 0100 which was giving no data in your package

From: Alistair Francis notifications@github.com Sent: Saturday, October 24, 2020 6:07 PM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

I have seen cases where Python-OBD sometimes guesses the wrong protocol. From memory I have only seen this when there is a hardware error, but with a knock-off adapter it's hard to know.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-715927894, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4EAFHD4KDOQ5DHE5D3SMLURZANCNFSM4SZW2GSQ.

1 Connection: Saturday, October 24, 2020 5:08:57 PM
2 OBD Now Terminal - Version 1.0.16 08:57.221 3 Android Version: 10 08:57. 225 4 Build Number: HUAWEIHMA-L29 08:57.225 5 Manufacturer: HUAWEI 08:57.225 6 Model: HMA-L29 08:57.225 7 Brand: HUAWEI 08:57.225 8 Device: HWHMA 08:57.225 9 Product: HMA-L29 08:57.225 10 Country: United States 08:57.225 11 Bluetooth Device: OBDII 08:58.407 12 Bluetooth Address: 00:1D:A5:68:98:8A 08:58.408 13 at 09:04.646 14 ? 09:04.734 15 > 09:04.734 16 AT 09:08.909 17 ? 09:08.970 18 > 09:08.970 19 ATL1 10:16.062 20 OK 10:16.096 21 10:16.096 22 

                                  10:16.096

23 ath1 10:19.812 24 OK 10:19.833 25 10:19.833 26 10:19.833 27 ats1 10:29.989 28 OK 10:30.011 29 10:30.011 30 10:30.011 31 atal1 10:33.093 32 OK 10:33.135 33 10:33.135 34 10:33.135 35 atal 10:40.239 36 OK 10:40.255 37 10:40.255 38 10:40.255 39 atma 10:52.515 40 ATMA 11:09.807 41 STOPPED 11:09.831 42 11:09.831 43 ? 11:09.831 44 11:09.831 45 11:09.831 46 ATMA 11:17.718 47 atma 11:52.957 48 STOPPED 11:53.046 49 11:53.046 50 ? 11:53.046 51 11:53.046 52 11:53.046 53 ATMA 11:57.018 54 ATMA 12:03.264 55 STOPPED 12:03.278 56 12:03.278 57 ? 12:03.278 58 12:03.289 59 12:03.289 60 ati 12:56.956 61 ELM327 v1.5 12:56.991 62 12:56.991 63 12:56.991 64 atsp0 13:28.779 65 OK 13:28.852 66 13:28.852 67 13:28.852 68 atma 13:43.922 69 atma 15:01.932 70 STOPPED 15:01.975 71 15:01.975 72 ? 15:01.975 73 15:01.975 74 15:01.975 75 ath1 15:05.584 76 OK 15:05.632 77 15:05.632 78 15:05.632 79 0100 15:08.191 80 SEARCHING... 15:08.914 81 18 DA F1 11 06 41 00 BC 3F A8 03 15:08.914 82 18 DA F1 1D 06 41 00 98 3A 80 01 15:08.914 83 15:08.914 84 15:08.914 85 atdp 15:44.134 86 AUTO, ISO 15765-4 (CAN 29/500) 15:44.184 87 15:44.184 88 15:44.184 89 atbd 16:28.678 90 0C 18 DA F1 1D 06 41 00 98 3A 80 01 40 16:28.760 91 16:28.760 92 16:28.760 93 0100 16:32.275 94 18 DA F1 11 06 41 00 BC 3F A8 03 16:32.414 95 18 DA F1 1D 06 41 00 98 3A 80 01 16:32.414 96 16:32.414 97 16:32.414 98 atrv 18:04.104 99 13.9V 18:04.132 100 18:04.133 101 18:04.133 102 0100 18:15.248 103 18 DA F1 11 06 41 00 BC 3F A8 03 18:15.378 104 18 DA F1 1D 06 41 00 98 3A 80 01 18:15.378 105 18:15.378 106 18:15.378 107 010c 18:32.223 108 18 DA F1 11 04 41 0C 0D 74 18:32.363 109 18 DA F1 1D 04 41 0C 0D 74 18:32.363 110 18:32.363 111 18:32.363 112 010c 18:42.194 113 18 DA F1 11 04 41 0C 15 9C 18:42.362 114 18 DA F1 1D 04 41 0C 15 9C 18:42.363 115 18:42.363 116 18:42.363 117 010c 18:47.897 118 18 DA F1 11 04 41 0C 1B 80 18:48.024 119 18 DA F1 1D 04 41 0C 1B 80 18:48.024 120 18:48.024 121 18:48.024 122 010c 18:52.101 123 18 DA F1 11 04 41 0C 10 44 18:52.224 124 18 DA F1 1D 04 41 0C 10 44 18:52.225 125 18:52.225 126 18:52.225 127 0103 22:29.985 128 18 DA F1 11 04 41 03 02 00 22:30.122 129 22:30.122 130 22:30.122 131 0103 22:33.785 132 18 DA F1 11 04 41 03 02 00 22:33.919 133 22:33.919 134 22:33.919 135 0303 22:37.303 136 NO DATA 22:37.555 137 22:37.555 138 22:37.555 139 0104 24:47.799 140 18 DA F1 11 03 41 04 6B 24:47.925 141 18 DA F1 1D 03 41 04 6C 24:47.925 142 24:47.925 143 24:47.925 144 0105 24:59.921 145 18 DA F1 11 03 41 05 6F 25:00.055 146 18 DA F1 1D 03 41 05 6F 25:00.055 147 25:00.055 148 25:00.055

zeesh1979 commented 3 years ago

Hi, I have been successful communicating with my same adapter using below script and it responds very well....now can you guide me if its possible to customize your library and get it worked with this adapter?

import bluetooth import threading import serial import time sockfd = bluetooth.BluetoothSocket(bluetooth.RFCOMM) sockfd.connect(('98:D3:31:xx:xx:xx', 1)) # BT Address def RViaBluetooth(): while(1): data = sockfd.recv(4096) print(data)

x=threading.Thread(target=RViaBluetooth) x.start()

sockfd.close()

while(1): tosend = input("quit?" ) if tosend != 'q':

sockfd.send(tosend)

    print("sending")
    sockfd.send('ATSP0')
    time.sleep(2)
    sockfd.send('ATI')
    time.sleep(2)
    sockfd.send('0103')
    time.sleep(2)
    sockfd.send('0104')
else:
    break
sockfd.close()

From: Alistair Francis notifications@github.com Sent: Saturday, October 24, 2020 6:07 PM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

I have seen cases where Python-OBD sometimes guesses the wrong protocol. From memory I have only seen this when there is a hardware error, but with a knock-off adapter it's hard to know.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-715927894, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4EAFHD4KDOQ5DHE5D3SMLURZANCNFSM4SZW2GSQ.

zeesh1979 commented 3 years ago

Hi, I have finally mamaged to get v2.1 obd and it successfully give me working debug as below log. but now issue is when i use your simple script to get speed and RPM, script returns None. below was done after adding delay=1 in every command of elm327.py

[obd.obd] ======================= python-OBD (v0.7.1) ======================= [obd.obd] Using scan_serial to select port [obd.obd] Available ports: ['/dev/rfcomm0'] [obd.obd] Attempting to use port: /dev/rfcomm0 [obd.elm327] Initializing ELM327: PORT=/dev/rfcomm0 BAUD=auto PROTOCOL=auto [obd.elm327] Response from baud 38400: b'?\r\r>' [obd.elm327] Choosing baud 38400 [obd.elm327] write: b'ATZ\r' [obd.elm327] wait: 1 seconds [obd.elm327] read: b'\r\rELM327 v2.1\r\r>' [obd.elm327] write: b'ATE0\r' [obd.elm327] wait: 1 seconds [obd.elm327] read: b'ATE0\rOK\r\r>' [obd.elm327] write: b'ATH1\r' [obd.elm327] wait: 1 seconds [obd.elm327] read: b'OK\r\r>' [obd.elm327] write: b'ATL0\r' [obd.elm327] wait: 1 seconds [obd.elm327] read: b'OK\r\r>' [obd.elm327] write: b'ATSP0\r' [obd.elm327] read: b'OK' [obd.elm327] write: b'0100\r' [obd.elm327] read: b'SEARCHING...\r18 DA F1 11 06 41 00 BC 3F A8 03 \r18 DA F1 1D 06 41 00 98 3A 80 01 \r\r>' [obd.elm327] write: b'ATDPN\r' [obd.elm327] read: b'A7\r\r>' [obd.protocols.protocol] map ECU 17 --> ENGINE [obd.protocols.protocol] map ECU 29 --> UNKNOWN [obd.elm327] Connected Successfully: PORT=/dev/rfcomm0 BAUD=38400 PROTOCOL=7 [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'18 DA F1 11 06 41 00 BC 3F A8 03 \r18 DA F1 1D 06 41 00 98 3A 80 01 \r\r>' [obd.obd] Sending command: b'0120': Supported PIDs [21-40] [obd.elm327] write: b'0120\r' [obd.elm327] read: b'18 DA F1 1D 06 41 20 80 00 A0 01 \r18 DA F1 11 06 41 20 80 1D B0 01 \r\r>' [obd.obd] Sending command: b'0140': Supported PIDs [41-60] [obd.elm327] write: b'0140\r' [obd.elm327] read: b'18 DA F1 11 06 41 40 7A D0 00 00 \r18 DA F1 1D 06 41 40 CA C0 00 00 \r\r>' [obd.obd] Sending command: b'0600': Supported MIDs [01-20] [obd.elm327] write: b'0600\r' [obd.elm327] read: b'NO DATA\r\r>' [obd.obd] finished querying with 73 commands supported

From: Muhammad Zeeshan Akram zeesh1979@hotmail.com Sent: Thursday, October 22, 2020 10:22 AM To: brendan-w/python-OBD reply@reply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

one last question hopefully :) please check the logs that i also attached in raising issue. if you see yellow highlighted line, it forces manual protocol setting and gets success at 6 (ISO_15765_4_11bit_500k). shouldnt this mean that my adapter has responded well and next all commands will be sent via this protocol?orange highlighted checking supported commands and it returns no data...if package is communicating with right protocol, i.e. 6, then it should be ok. i was thinking if in my code i do manual protocol set as you suggested even then this will not work. regarding elm versions, i checked on many websites like aliexpress,banggood etc all of them saying v1.5

https://www.banggood.com/search/elm32.html https://www.aliexpress.com/af/elm327.html?d=y&origin=n&SearchText=elm327&catId=0&initiative_id=SB_20201021232046

[obd.elm327] ELM responded with unknown protocol. Trying them one-by-one [obd.elm327] write: b'ATTP6\r' [obd.elm327] read: b'OK\r\r' [obd.elm327] write: b'0100\r' [obd.elm327] read: b'NO DATA\r\r>' [obd.elm327] Connected Successfully: PORT=/dev/rfcomm0 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'NO DATA\r\r>' [obd.OBDCommand] b'0100': Supported PIDs [01-20] did not receive any acceptable messages [obd.obd] No valid data for PID listing command: b'0100': Supported PIDs [01-20] [obd.obd] Sending command: b'0600': Supported MIDs [01-20] [obd.elm327] write: b'0600\r' [obd.elm327] read: b'NO DATA\r\r>'

From: Alistair Francis notifications@github.com Sent: Thursday, October 22, 2020 2:57 AM To: brendan-w/python-OBD python-OBD@noreply.github.com Cc: zeesh1979 zeesh1979@hotmail.com; Author author@noreply.github.com Subject: Re: [brendan-w/python-OBD] Everything connected but no data (#205)

I don't have a recommendation for a OBD connector. I designed my own with a official ELM327 chip.

SparkFunhttps://www.sparkfun.com/products/9555 have one that uses the STN1110 chip instead. This library works with that as well (as it's ELM compliant).

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/brendan-w/python-OBD/issues/205#issuecomment-714017552, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AE5TO4GBBQ3LWDEN56VQYF3SL5YQBANCNFSM4SZW2GSQ.