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arduino: WT61 init logics & matched mounting

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Mikkeli Matlock
2026-02-02 19:30:15 +09:00
parent f7f0af92dd
commit 83cc6bed19
5 changed files with 86 additions and 21 deletions
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44
arduino/main/voltage.cpp
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@@ -12,17 +12,49 @@ static const float ADC_REF = 5.0;
static const int ADC_MAX = 1023;
static const float OFFSET = 0.2; // calib
// Sliding window smoother (max 32 samples to keep RAM usage sane)
static const int MAX_WINDOW = 32;
static int _samples[MAX_WINDOW];
static int _windowSize = 20; // Active window size
static int _sampleIndex = 0;
static long _sampleSum = 0;
void voltage_init() {
// analogRead doesn't need explicit pinMode, but here for future config
// e.g., could switch to internal 1.1V reference for different range
voltage_set_smoothing(20); // Default 20 samples
}
void voltage_set_smoothing(int windowSize) {
// Clamp to valid range
if (windowSize < 1) windowSize = 1;
if (windowSize > MAX_WINDOW) windowSize = MAX_WINDOW;
_windowSize = windowSize;
// Pre-fill window with current reading
int initial = analogRead(PIN_VBAT);
for (int i = 0; i < _windowSize; i++) {
_samples[i] = initial;
}
_sampleSum = (long)initial * _windowSize;
_sampleIndex = 0;
}
int voltage_read_raw() {
return analogRead(PIN_VBAT);
}
float voltage_read() {
int raw = voltage_read_raw();
float vDivider = (raw / (float)ADC_MAX) * ADC_REF;
return vDivider / DIVIDER_RATIO + OFFSET;
int voltage_read_smoothed() {
int raw = analogRead(PIN_VBAT);
_sampleSum -= _samples[_sampleIndex]; // Remove oldest
_samples[_sampleIndex] = raw; // Store new
_sampleSum += raw; // Add new
_sampleIndex = (_sampleIndex + 1) % _windowSize;
return _sampleSum / _windowSize;
}
float voltage_read() {
int raw = voltage_read_smoothed();
float vDivider = (raw / (float)ADC_MAX) * ADC_REF;
return vDivider / DIVIDER_RATIO + OFFSET;
}