dbus-serialbattery: JK_B2A8S20P ttyUSB0 cant connect

Describe the problem

Cant get the serial interface get to work. App About Section: Screenshot_2023-11-17-08-43-13-22_bd59be8c3f820c1e3d6fc2892aab342d how i connect the BMS to my raspberry pi 3 via USB IMG_20231117_121120 on the test the tx led is blinking but the rx led never blinks on the USB adapter. Kindly asking for assistance. The bluetooth connection is working, sadly not very stable thats why i want to have cabled version. with other version of the driver(dev/latest or beta) the bluetooth connection has some other drawbacks. BLE connection should be out of scope for this issue report.

To give more insight on the BLE connection, and why i want to switch to cabled version: i connect BLE via onboard raspberry pi 3 bluetooth controller

stable release - currently works best but looses BMS regularly
beta release - doesnt provide values
current dev - kind of looked promising but ended up in stale data and didnt recognised that connection was lost.

Driver version

v1.0.20230531

Venus OS device type

Raspberry Pi

Venus OS version

v3.11

BMS type

JKBMS / Heltec BMS

Cell count

Connection type

Serial USB adapter to RS485

Config file

[DEFAULT]
; --------- Additional settings ---------
; Specify only one BMS type to load else leave empty to try to load all available
; -- Available BMS:
; Daly, Ecs, HeltecModbus, HLPdataBMS4S, Jkbms, Lifepower, LltJbd, Renogy, Seplos
; -- Available BMS, but disabled by default:
; https://louisvdw.github.io/dbus-serialbattery/general/install#how-to-enable-a-disabled-bms
; Ant, MNB, Sinowealth
BMS_TYPE = Jkbms

Relevant log output

2023-11-10 20:31:29.727918500 INFO:SerialBattery:Starting dbus-serialbattery
2023-11-10 20:31:29.729081500 INFO:SerialBattery:dbus-serialbattery v1.0.20230531
2023-11-10 20:31:29.729629500 INFO:SerialBattery:Testing Jkbms
2023-11-10 20:31:29.997859500 ERROR:SerialBattery:>>> ERROR: No reply - returning
2023-11-10 20:31:30.500546500 INFO:SerialBattery:Testing Jkbms
2023-11-10 20:31:30.775567500 ERROR:SerialBattery:>>> ERROR: No reply - returning

Any other information that may be helpful

No response

About this issue

Original URL
State: closed
Created 7 months ago
Comments: 18

Most upvoted comments

@mr-manuel thanks for your assistance, to give an update, i tried an external bluetooth adapter, sadly after some time it just stalled, so no updated information was visible in venus os(dev latest version), ended up depleting the battery allthough lower limit of SOC reached, for latest release a lot of lost BMS came up, which initially led me to cable the connection.

next step TTL, finally got a cabled connection to my BMS and received data. I went with https://amzn.eu/d/eDXb5DW

I will observe the situation how stable but i expect no issues from here on forward.

Awesome job you have done here. Kudos and many thanks.

dyn4mic on Nov 25, 2023