From 1119d79856deb38630a447b13448654d52080698 Mon Sep 17 00:00:00 2001
From: Matthew Kennedy <matthewkennedy@outlook.com>
Date: Mon, 12 Jul 2021 23:45:35 -0700
Subject: [PATCH] heater tweaks

---
 firmware/heater_control.cpp | 8 ++++----
 firmware/wideband_config.h  | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/firmware/heater_control.cpp b/firmware/heater_control.cpp
index b8e15c8..44e4ba8 100644
--- a/firmware/heater_control.cpp
+++ b/firmware/heater_control.cpp
@@ -92,7 +92,7 @@ static float GetVoltageForState(HeaterState state, float heaterEsr)
     {
         case HeaterState::Preheat: return 0.04f;
         case HeaterState::WarmupRamp:
-            if (rampVoltage < 12)
+            if (rampVoltage < 10)
             {
                 // 0.3 volt per second, divided by battery voltage and update rate
                 constexpr float rampRateVoltPerSecond = 0.3f;
@@ -135,9 +135,9 @@ static void HeaterThread(void*)
         state = GetNextState(state, heaterEsr);
         float heaterVoltage = GetVoltageForState(state, heaterEsr);
 
-        // Limit to 13 volts
-        if (heaterVoltage > 13) {
-            heaterVoltage = 13;
+        // Limit to 11 volts
+        if (heaterVoltage > 11) {
+            heaterVoltage = 11;
         }
 
         // duty = (V_eff / V_batt) ^ 2
diff --git a/firmware/wideband_config.h b/firmware/wideband_config.h
index e8adcc0..59dc3d6 100644
--- a/firmware/wideband_config.h
+++ b/firmware/wideband_config.h
@@ -44,7 +44,7 @@
 #define HEATER_PREHEAT_TIME 5000
 #define HEATER_WARMUP_TIMEOUT 30000
 
-#define HEATER_CLOSED_LOOP_THRESHOLD_ESR 800
+#define HEATER_CLOSED_LOOP_THRESHOLD_ESR 400
 #define HEATER_TARGET_ESR 300
 #define HEATER_OVERHEAT_ESR 150
-#define HEATER_UNDERHEAT_ESR 1200
+#define HEATER_UNDERHEAT_ESR 600