BLE ELM327 Response Parsing

[clumsyCoder00]

Hello, thank you for making this available! I am attempting to pull OBD-II data from my car into homeassistant via this component.

The relevant yaml code snippets are as follows:

external_components:
  - source: github://eigger/espcomponents@latest
    components: [ ble_elm327 ]
    refresh: always

ble_client:
  - mac_address: "66:1E:87:00:B3:4F"
    id: obd_client

ble_elm327:
  id: elm
  ble_client_id: obd_client
  # VEEPEAK OBD-II Scan Tool
  service_uuid: "FFF0"
  rx_char_uuid: "FFF1"
  tx_char_uuid: "FFF2"
  init_commands:
    - "ATAL"
  tx_delay: 50

switch:
  - platform: ble_client
    ble_client_id: obd_client
    name: "Enable OBDII"

sensor:
  - platform: ble_elm327
    name: "On-board charger, AC voltage a"
    pid: "E002"
    mode: "22"
    pre_commands:
      - "ATSH 7E5"
    update_interval: 5s
    formula: "return a;"

I am using this OBD database as a reference PBDb Explorer

In particular, I'm looking for the data stored in the IONIQ5_OBC_AC_VOLTAGE_A_RMS slot.

The response that I receive in the logs for PID E002 is a follows:

[D][ble_elm327:216]: >> 22E002
[D][ble_elm327:226]: << 22E002
[D][ble_elm327:226]: << 03D
0: 62 E0 02 9F FF 3F
1: F8 04 94 00 00 00 00
2: 3C 04 6D 04 6D 00 15
3: 18 B8 1D 66 00 9F 00
4: 9F FF FD 57 4E 00 39
5: 00 E6 00 00 00 00 01
6: 04 00 FA 01 55 01 6D
7: 00 FF 00 FA 00 E3 01
8: 08 03 04 FB 05 17 AA
[D][ble_elm327:226]: <<
>

The data that I need is on line 1, bits 32-47, the 04 94 value is the 16 bits I need to pull into homeassistant.

If I'm understanding correctly, only the response data following the echo on line 0 is accessible through the a, b, c & d arguments. Is there any way for me to access the data on the subsequent lines?

Thank you for your assistance!

[eigger]

Previously, multiline parsing wasn't supported, and the formula parameters only included 'abcd', so I added 'ef' too.
Could you please test it like below?

sensor:
  - platform: ble_elm327
    name: "On-board charger, AC voltage a"
    pid: "E002"
    mode: "22"
    pre_commands:
      - "ATSH 7E5"
    update_interval: 5s
    formula: "return (e * 256.0f + f);"

[clumsyCoder00]

Thanks for your response!

This is what I'm getting back whether I use your updated formula using the e & f parameters, or the previous version using the a parameter:

[13:20:59.217][D][esp32_ble_client:212]: [0] [66:1E:87:00:B3:4F] ESP_GATTC_SEARCH_CMPL_EVT
[13:20:59.217][I][esp32_ble_client:465]: [0] [66:1E:87:00:B3:4F] Service discovery complete
[13:20:59.217][I][ble_elm327:176]: RX handle=18 TX handle=16 — registering notify
[13:20:59.222][D][esp32_ble_client:411]: [0] [66:1E:87:00:B3:4F] cfg_mtu status 0, mtu 247
[13:20:59.222][I][ble_elm327:194]: Queued 7 init commands (6 base + 1 extra)
[13:20:59.314][D][ble_elm327:220]: >> ATZ
[13:20:59.314][S][switch]: 'Enable OBDII' >> ON
[13:20:59.330][D][ble_elm327:220]: >> ATE0
[13:20:59.414][D][ble_elm327:220]: >> ATL0
[13:20:59.512][D][ble_elm327:220]: >> ATS0
[13:20:59.524][D][ble_elm327:220]: >> ATH0
[13:20:59.615][D][ble_elm327:220]: >> ATSP0
[13:20:59.628][D][ble_elm327:220]: >> atal
[13:20:59.633][I][ble_elm327:098]: ELM327 initialized and ready
[13:20:59.718][D][ble_elm327:220]: >> ATSH 7E5
[13:20:59.747][D][ble_elm327:220]: >> 22E002
[13:21:00.434][D][ble_elm327:236]: << ATZ
\xfc
ELM327 v1.5
[13:21:02.790][D][ble_elm327:220]: >> 22E002
[13:21:07.743][D][ble_elm327:220]: >> 22E002
[13:21:08.626][D][ble_elm327:236]: << 22E002
SEARCHING...
STOPPED
[13:21:12.743][D][ble_elm327:220]: >> 22E002
[13:21:17.747][D][ble_elm327:220]: >> 22E002
[13:21:18.568][D][ble_elm327:236]: << 22E002
SEARCHING...
STOPPED

Edit: The vehicle system may be shut down, I'll post another update when I can conform that the vehicle system is up and running.

[eigger]

Could you try again with the latest version? It behaves a bit differently from my adapter.
It seems it didn't work properly because another initialization command was sent before receiving the response for ATZ.
I've modified it to check for the response first.

[clumsyCoder00]

Alright, I'll give it a go when I get back from work.

[clumsyCoder00]

This works great! Thank you so much!