chore: change lower cutoff voltage (battery curve)

Author: filipton

src/battery.rs

@@ -6,20 +6,17 @@ use esp_hal::analog::adc::{Adc, AdcConfig, Attenuation};
 
 type AdcCal = esp_hal::analog::adc::AdcCalCurve<esp_hal::peripherals::ADC1<'static>>;
 
-const BATTERY_CURVE: [(f64, u8); 14] = [
-    (3200.0, 0),
-    (3250.0, 5),
-    (3300.0, 10),
-    (3350.0, 20),
-    (3400.0, 30),
-    (3450.0, 35),
-    (3500.0, 40),
-    (3550.0, 45),
-    (3600.0, 50),
-    (3700.0, 60),
-    (3800.0, 70),
-    (3900.0, 80),
-    (4000.0, 90),
+const BATTERY_CURVE: [(f64, u8); 11] = [
+    (3350.0, 0),
+    (3400.0, 13),
+    (3450.0, 19),
+    (3500.0, 25),
+    (3550.0, 31),
+    (3600.0, 38),
+    (3700.0, 50),
+    (3800.0, 63),
+    (3900.0, 75),
+    (4000.0, 88),
     (4100.0, 100),
 ];
 const BAT_MIN: f64 = BATTERY_CURVE[0].0;