manchester encoding inverted: 0 maps to 01 instead of 10 #2

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opened 2026-07-26 17:01:36 +00:00 by daru · 1 comment

daru commented

2026-07-26 17:01:36 +00:00

Owner

manchester_table maps data bit 0 to symbol 01 and bit 1 to symbol 10. rtl_433 bitbuffer_manchester_decode takes bit2 as the decoded bit, so 01 decodes to 1 and 10 decodes to 0 - all bits inverted on receive.

Fix: flip the table so 0 maps to 10, 1 maps to 01.

time commented

2026-07-26 21:38:52 +00:00

Contributor

Fixed in PR #13. Manchester encoding now follows IEEE 802.3: 0 → 10 (falling edge), 1 → 01 (rising edge). Table updated, PREAMBLE changed from 0x1143 to 0xEEBC, and manchester_gen.py added as the canonical table generator with --verify flag.

Fixed in PR #13. Manchester encoding now follows IEEE 802.3: 0 → 10 (falling edge), 1 → 01 (rising edge). Table updated, PREAMBLE changed from 0x1143 to 0xEEBC, and `manchester_gen.py` added as the canonical table generator with `--verify` flag.

daru closed this issue

2026-07-26 22:19:29 +00:00