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Add non-linear position estimation for RTS roller shades

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Motor speed varies with drum radius as shade material winds/unwinds,
causing linear time-interpolation to misestimate position. Adds two
optional calibration fields (upMidTime, downMidTime) that let users
provide the elapsed time at 50% travel. A logarithmic model (alpha
ratio solved via Newton's method) then replaces the linear formula.
Falls back to existing linear behaviour when mid-time fields are zero.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Frédéric Metrich 2026-07-02 21:51:34 +02:00
parent eb75868adb
commit 769b2ddd7d
4 changed files with 4319 additions and 2879 deletions
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5
Somfy.h
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@ -314,6 +314,11 @@ class SomfyShade : public SomfyRemote {
uint32_t upTime = 10000;
uint32_t downTime = 10000;
uint32_t tiltTime = 7000;
uint32_t upMidTime = 0; // Time (ms) from 100% to 50% when opening; 0 = linear
uint32_t downMidTime = 0; // Time (ms) from 0% to 50% when closing; 0 = linear
float alphaUp = 0.0f; // Derived from upMidTime/upTime; 0 = use linear
float alphaDown = 0.0f; // Derived from downMidTime/downTime; 0 = use linear
void computeAlphas();
uint16_t stepSize = 100;
bool save();
bool isIdle();