fix(battery): harden charge-complete inference

components/control_plane/src/runtime/control_plane_battery_service.c

@@ -22,9 +22,9 @@
 #define BATTERY_STOP_POLL_MS              10
 #define BATTERY_CHARGE_DEBOUNCE_MS         30
 #define BATTERY_FULL_CONFIRM_RETRY_MS     1000
-#define BATTERY_FULL_CONFIRM_TIME_MS      5000
+#define BATTERY_FULL_CONFIRM_TIME_MS \
+        ((uint32_t)CONFIG_TQ_BATTERY_FULL_CONFIRM_SEC * 1000U)
 #define BATTERY_FULL_CONFIRM_SAMPLES         3U
-#define BATTERY_FULL_MIN_VOLTAGE_MV       4050
 #define BATTERY_SHUTDOWN_CONFIRM_SAMPLES      3U
 #define BATTERY_EMERGENCY_CONFIRM_SAMPLES     2U
 #define BATTERY_SHUTDOWN_RETRY_MS           1000
@@ -339,8 +339,9 @@ static void control_plane_battery_full_hint_hook(
     }
 
     ESP_LOGI(TAG,
-             "Inferred charge-complete prompt start voltage=%dmV file=%s",
+             "Inferred charge-complete prompt start voltage=%dmV level=%u%% file=%s",
              status->voltage_mv,
+             (unsigned)status->percentage,
              BATTERY_FULL_PROMPT_FILE);
     esp_err_t prompt_err = domain_runtime_behavior_play_prompt_file(
             BATTERY_FULL_PROMPT_FILE);
@@ -453,11 +454,13 @@ static void battery_worker(void *arg)
             if (full_hint_candidate && status.valid &&
                 !status.measurement_suppressed) {
                 if (status.charge_state != DOMAIN_BATTERY_CHARGE_NOT_CHARGING ||
-                    status.voltage_mv < BATTERY_FULL_MIN_VOLTAGE_MV) {
+                    status.voltage_mv < CONFIG_TQ_BATTERY_FULL_MIN_VOLTAGE_MV ||
+                    status.percentage < CONFIG_TQ_BATTERY_FULL_MIN_PERCENT) {
                     ESP_LOGI(TAG,
-                             "Charge-complete inference cancelled charge=%s voltage=%dmV",
+                             "Charge-complete inference cancelled charge=%s voltage=%dmV level=%u%%",
                              charge_state_name(status.charge_state),
-                             status.voltage_mv);
+                             status.voltage_mv,
+                             (unsigned)status.percentage);
                     full_hint_candidate = false;
                     full_hint_confirmations = 0U;
                 } else {

main/Kconfig.projbuild

@@ -979,6 +979,28 @@ menu "Example Configuration"
             range 0 1
             depends on TQ_BATTERY_ENABLE
 
+        config TQ_BATTERY_FULL_MIN_VOLTAGE_MV
+            int "Minimum voltage for charge-complete prompt (mV)"
+            default 4150
+            range 4000 4200
+            depends on TQ_BATTERY_ENABLE
+            help
+                The TP4057 status pin cannot distinguish charge termination
+                from charger removal. Require at least this filtered battery
+                voltage before inferring that charging has completed.
+
+        config TQ_BATTERY_FULL_MIN_PERCENT
+            int "Minimum level for charge-complete prompt (percent)"
+            default 95
+            range 90 100
+            depends on TQ_BATTERY_ENABLE
+
+        config TQ_BATTERY_FULL_CONFIRM_SEC
+            int "Charge-complete stable confirmation time (seconds)"
+            default 30
+            range 5 300
+            depends on TQ_BATTERY_ENABLE
+
         config TQ_BATTERY_DIVIDER_HIGH_OHM
             int "Battery divider resistance from VBAT to ADC (ohm)"
             default 100000

sdkconfig.defaults

@@ -332,6 +332,9 @@ CONFIG_TQ_BATTERY_ENABLE=y
 CONFIG_TQ_BATTERY_ADC_GPIO=9
 CONFIG_TQ_BATTERY_CHARGE_GPIO=10
 CONFIG_TQ_BATTERY_CHARGE_ACTIVE_LEVEL=0
+CONFIG_TQ_BATTERY_FULL_MIN_VOLTAGE_MV=4150
+CONFIG_TQ_BATTERY_FULL_MIN_PERCENT=95
+CONFIG_TQ_BATTERY_FULL_CONFIRM_SEC=30
 CONFIG_TQ_BATTERY_DIVIDER_HIGH_OHM=100000
 CONFIG_TQ_BATTERY_DIVIDER_LOW_OHM=100000
 CONFIG_TQ_BATTERY_CALIBRATION_GAIN_PPM=1000000