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Firmware size reportBase: 79b6626 on
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…stimation - Estimate pack internal resistance from load steps (signed dV/dI, EWMA) - Voltage-based SOC (SOC Havrla) using per-chemistry 60/94/120Ah lookup tables - New setting BMWI3SOCHAVR: Disable / Auto (use Havrla if >3% off) / Enable - Show internal resistance and SOC Havrla on the battery page SOC logic ported from Adam Chyský's field-tested version. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The resistance estimation, SOC lookup tables, the BMWI3SOCHAVR setting and its web UI are compiled out under SMALL_FLASH_DEVICE (LilyGo T-CAN485). There the BMW i3 keeps using the BMS SOC as before. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Port of Adam Chyský's final version (internal 10.4.0.21), tested on 60/94/120Ah packs in full SOC Havrla mode: - Fix the sign of the current correction: OCV = V - I*R (charging current is positive), and fade it out over the last 0.5 % near 0/100 % - Keep the SOC filter state per battery instance instead of a function static, so a double i3 setup no longer shares one filter - Within +-5 % move at most 1 %/min and never against the current direction; outside that window use the faster EWMA - Fix the resistance estimate scaling (|dV|/|dI|, 1 Ohm = 100000 uV/dA) and seed its EWMA from the 80 mOhm default; retune step detection - Adjust the top of the 60Ah table and the IR offset (-10 mOhm) While SOC Havrla is set to Auto or Enable it also: - reports SOC in whole percent with 1 % hysteresis - adds cell voltage based charge/discharge current limits per pack size and a SOC based charge limit near full; they only lower the BMS limits and are released by at most 1-2 A/min With SOC Havrla disabled the BMW i3 behaves as before. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Test PR in the fork, only to let CI build all environments (including lilygo_330 / T-CAN485 with SMALL_FLASH_DEVICE) before opening the real PR upstream. Not for merging.
Not tested on hardware.
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