Add external voltage extraction for h02 protocol (replaces #5703)#5788
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benjamingray123 wants to merge 1 commit intotraccar:masterfrom
Open
Add external voltage extraction for h02 protocol (replaces #5703)#5788benjamingray123 wants to merge 1 commit intotraccar:masterfrom
benjamingray123 wants to merge 1 commit intotraccar:masterfrom
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tananaev
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Feb 13, 2026
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| if (buf.readableBytes() >= 3) { | ||
| buf.skipBytes(buf.readableBytes() - 3); | ||
| position.set(Position.KEY_POWER, buf.readUnsignedShort() / 10.0); | ||
| } |
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This definitely conflicts with other protocols.
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This PR replaces #5703 which was accidentally closed due to a force-push error.
It addresses all maintainer feedback from the previous PR:
readableBytes()checks instead of absolute indexesH02FrameDecoder)Original description below:
Following my post in the forum: https://www.traccar.org/forums/topic/automotive-relay-style-cj7320-cj730-lk720-not-displaying-vehicle-battery-voltage/
My code adds support for extracting external/vehicle battery voltage from H02 protocol binary messages with extended format (47 bytes).
The frame decoder now correctly detects and reads extended format messages when configured with
protocol.h02.messageLength=47.Changes
Configuration
Users with extended format devices should set: