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syssi / esphome-jk-bms

ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE
Apache License 2.0
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Invalid Header Error when discharging #489

Open ctaskin opened 3 months ago

ctaskin commented 3 months ago

Hi, First of all thank you for your effort. Everything is working fine when no load is connected to the battery but it gives Invalid Header Error when I start discharging come current.

My BMS Model is JK_B1A8S20P and I am using ESP32 Dev kit

I am attaching my log, At the top and bottom discharge is disabled, in the middle it is enabled.

It looks like the end of the previous message is added to the start of the next message, and that is causing the problem, may be there is some buffering issue? you can see an example below.. Bold part is the start of a regular message.

17:56:12][D][uart_debug:114]: <<< 20:55:73:65:72:64:61:4A:4B:5F:42:31:41:B8:53:32:30:50:00:C0:01:00:00:00:00:68:00:00:4B:3F:4E:57:00:FD:00:00:00:00:06:00:01:79:0C:01:0C:AF:02:0C:AE:03:0C:AD:04:0C:AB:80:00:1A:81:00:1A:82:00:19:83:05:11:84:02:F7:85:30:86:02:87:00:00:89:00:00:00:39:8A:00:04:8B:00:00:8C:00:03:8E:05:A0:8F:04:10:90:0E:10:91:0D:DE:92:00:03:93:0A:28:94:0A:5A:95:00:03:96:01:2C:97:00:C8:98:01:2C:99:00:19:9A:00:1E:9B:0B:B8:9C:00:0A:9D:01:9E:00:64:9F:00:50:A0:00:64:A1:00:64

log.txt

syssi commented 3 months ago

How long is the data cable between the BMS and the ESP?

ctaskin commented 3 months ago

Not much, 10cm max