fix: MENU_MODE uses setMode() for consistent slave mode sync

SmartEVSE-3/src/main.cpp

@@ -2689,7 +2689,15 @@ uint8_t setItemValue(uint8_t nav, uint16_t val) {
             break;
         SETITEM(MENU_MAX_TEMP, maxTemp)
         SETITEM(MENU_CONFIG, Config)
-        SETITEM(MENU_MODE, Mode)
+        // MENU_MODE must call setMode() for full side effects (phase switching,
+        // error clearing, ChargeDelay reset) — not just raw assignment.
+        // Mirrors the STATUS_MODE handler below. Guards with Mode != val to
+        // prevent redundant calls when both BroadcastSettings and per-node
+        // writes deliver the same mode. Fixes #120.
+        case MENU_MODE:
+            if (Mode != val)
+                setMode(val);
+            break;
         SETITEM(MENU_START, StartCurrent)
         SETITEM(MENU_STOP, StopTime)
         SETITEM(MENU_IMPORT, ImportCurrent)

SmartEVSE-3/test/native/tests/test_mode_sync.c

@@ -0,0 +1,302 @@
+/*
+ * test_mode_sync.c - Mode synchronization behavioral expectations
+ *
+ * The firmware's setMode() function applies side effects when switching
+ * between Normal/Smart/Solar modes: phase switching, error clearing,
+ * timer resets, and charge delay clearing. These tests verify the state
+ * machine's expected state after a mode switch, documenting the behavior
+ * that the MENU_MODE fix (#120) enables for slaves receiving mode via
+ * BroadcastSettings.
+ *
+ * Note: setMode() itself is in main.cpp (firmware glue, not testable
+ * natively). These tests exercise the pure C functions it calls:
+ * evse_check_switching_phases(), evse_clear_error_flags(), evse_set_state().
+ */
+
+#include "test_framework.h"
+#include "evse_ctx.h"
+#include "evse_state_machine.h"
+
+static evse_ctx_t ctx;
+
+static void setup_charging_3p(void) {
+    evse_init(&ctx, NULL);
+    ctx.AccessStatus = ON;
+    ctx.Mode = MODE_SMART;
+    ctx.LoadBl = 0;
+    ctx.State = STATE_C;
+    ctx.BalancedState[0] = STATE_C;
+    ctx.BalancedMax[0] = 160;
+    ctx.Balanced[0] = 100;
+    ctx.ChargeCurrent = 160;
+    ctx.MinCurrent = 6;
+    ctx.MaxCurrent = 16;
+    ctx.MaxCapacity = 16;
+    ctx.Nr_Of_Phases_Charging = 3;
+    ctx.EnableC2 = AUTO;
+    ctx.contactor1_state = true;
+    ctx.contactor2_state = true;
+    ctx.MainsMeterType = 1;
+    ctx.MaxMains = 25;
+    ctx.MaxCircuit = 32;
+    ctx.phasesLastUpdateFlag = true;
+    ctx.Node[0].IntTimer = 100;
+}
+
+/* ================================================================
+ * GROUP 1: Phase switching on mode change (EnableC2 = SOLAR_OFF)
+ *
+ * When EnableC2 = SOLAR_OFF and mode switches between Solar and
+ * other modes, the CP must disconnect (C→C1 or B→B1) to allow
+ * safe contactor switching. Without setMode(), this is skipped.
+ * ================================================================ */
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-001
+ * @scenario SOLAR_OFF: switching to Solar requires single-phase (evse_force_single_phase)
+ * @given EVSE in Smart mode charging on 3 phases, EnableC2=SOLAR_OFF
+ * @when Mode is set to Solar and evse_check_switching_phases is called
+ * @then evse_force_single_phase returns true (C2 must be off in Solar mode)
+ */
+void test_solar_off_forces_single_phase_in_solar(void) {
+    setup_charging_3p();
+    ctx.EnableC2 = SOLAR_OFF;
+    ctx.Mode = MODE_SOLAR;
+
+    /* evse_force_single_phase checks EnableC2 and Mode */
+    int force_1p = evse_force_single_phase(&ctx);
+    TEST_ASSERT_TRUE(force_1p);
+}
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-002
+ * @scenario SOLAR_OFF: Smart mode allows three-phase
+ * @given EVSE with EnableC2=SOLAR_OFF in Smart mode
+ * @when evse_force_single_phase is checked
+ * @then Returns false (C2 allowed in non-Solar modes with SOLAR_OFF)
+ */
+void test_solar_off_allows_3p_in_smart(void) {
+    setup_charging_3p();
+    ctx.EnableC2 = SOLAR_OFF;
+    ctx.Mode = MODE_SMART;
+
+    int force_1p = evse_force_single_phase(&ctx);
+    TEST_ASSERT_FALSE(force_1p);
+}
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-003
+ * @scenario State C entry with SOLAR_OFF in Solar mode opens C2 contactor
+ * @given EVSE with EnableC2=SOLAR_OFF, Mode=Solar, entering STATE_C
+ * @when evse_set_state(ctx, STATE_C) is called
+ * @then contactor2 is off (single-phase charging)
+ */
+void test_state_c_entry_solar_off_opens_c2(void) {
+    setup_charging_3p();
+    ctx.EnableC2 = SOLAR_OFF;
+    ctx.Mode = MODE_SOLAR;
+    ctx.State = STATE_B;
+
+    evse_set_state(&ctx, STATE_C);
+
+    /* In Solar mode with SOLAR_OFF, C2 should be off */
+    TEST_ASSERT_FALSE(ctx.contactor2_state);
+    TEST_ASSERT_EQUAL_INT(1, ctx.Nr_Of_Phases_Charging);
+}
+
+/* ================================================================
+ * GROUP 2: Error and timer clearing on mode switch
+ *
+ * setMode() clears LESS_6A and SolarStopTimer when switching to
+ * Smart mode. Without setMode(), a slave could retain stale errors
+ * from a previous Solar mode session.
+ * ================================================================ */
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-004
+ * @scenario Clearing LESS_6A on switch to Smart (via evse_clear_error_flags)
+ * @given EVSE with LESS_6A error set from solar shortage
+ * @when evse_clear_error_flags clears LESS_6A (as setMode does for Smart)
+ * @then ErrorFlags no longer has LESS_6A set
+ */
+void test_clear_less6a_on_mode_switch(void) {
+    setup_charging_3p();
+    ctx.ErrorFlags = LESS_6A;
+
+    /* setMode(Smart) calls clearErrorFlags(LESS_6A) */
+    evse_clear_error_flags(&ctx, LESS_6A);
+
+    TEST_ASSERT_FALSE(ctx.ErrorFlags & LESS_6A);
+}
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-005
+ * @scenario SolarStopTimer persists if mode switch misses setMode
+ * @given EVSE with SolarStopTimer=300, mode changes to Smart
+ * @when Only Mode variable is assigned (simulating SETITEM bug)
+ * @then SolarStopTimer remains at 300 (stale — not cleared)
+ * @note This documents the bug: without setMode(), timers are not reset
+ */
+void test_raw_mode_assign_leaves_timer_stale(void) {
+    setup_charging_3p();
+    ctx.Mode = MODE_SOLAR;
+    ctx.SolarStopTimer = 300;
+
+    /* Simulate SETITEM(MENU_MODE, Mode): raw assignment */
+    ctx.Mode = MODE_SMART;
+
+    /* Timer NOT cleared — this is the bug */
+    TEST_ASSERT_EQUAL_INT(300, ctx.SolarStopTimer);
+}
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-006
+ * @scenario SolarStopTimer cleared when setMode side effects applied
+ * @given EVSE with SolarStopTimer=300, mode changes to Smart
+ * @when setMode side effects are applied (timer reset to 0)
+ * @then SolarStopTimer is 0
+ */
+void test_setmode_clears_timer(void) {
+    setup_charging_3p();
+    ctx.Mode = MODE_SOLAR;
+    ctx.SolarStopTimer = 300;
+
+    /* Simulate what setMode(Smart) does: */
+    ctx.Mode = MODE_SMART;
+    ctx.SolarStopTimer = 0;  /* setSolarStopTimer(0) */
+    evse_clear_error_flags(&ctx, LESS_6A);
+
+    TEST_ASSERT_EQUAL_INT(0, ctx.SolarStopTimer);
+    TEST_ASSERT_FALSE(ctx.ErrorFlags & LESS_6A);
+}
+
+/* ================================================================
+ * GROUP 3: Mode-dependent regulation behavior
+ *
+ * After a mode switch, the state machine must use the new mode for
+ * current regulation. These tests verify that evse_calc_balanced_current
+ * respects the Mode field consistently.
+ * ================================================================ */
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-007
+ * @scenario Smart→Solar mid-charge: regulation switches to solar algorithm
+ * @given EVSE charging in Smart mode with mains headroom available
+ * @when Mode is changed to Solar and evse_calc_balanced_current is called
+ * @then Solar fine regulation is applied (IsetBalanced changes differently)
+ */
+void test_mid_charge_smart_to_solar(void) {
+    setup_charging_3p();
+    ctx.Mode = MODE_SMART;
+    ctx.MainsMeterImeasured = 100;
+    ctx.Isum = 100;
+    ctx.IsetBalanced = 150;
+    ctx.IsetBalanced_ema = 150;
+    ctx.StartCurrent = 4;
+    ctx.StopTime = 10;
+    ctx.ImportCurrent = 0;
+    ctx.SolarFineDeadBand = SOLAR_FINE_DEADBAND_DEFAULT;
+
+    /* Run one cycle in Smart mode */
+    evse_calc_balanced_current(&ctx, 0);
+    int32_t smart_iset = ctx.IsetBalanced;
+
+    /* Switch to Solar mode (simulating setMode side effects) */
+    ctx.Mode = MODE_SOLAR;
+    ctx.IsetBalanced = 150;
+    ctx.IsetBalanced_ema = 150;
+
+    /* Run one cycle in Solar mode with same grid conditions */
+    evse_calc_balanced_current(&ctx, 0);
+    int32_t solar_iset = ctx.IsetBalanced;
+
+    /* Solar regulation should produce different result than Smart
+     * (solar decreases more aggressively when importing) */
+    TEST_ASSERT_TRUE(smart_iset != solar_iset);
+}
+
+/*
+ * @feature Mode Synchronization
+ * @req REQ-MODE-SYNC-008
+ * @scenario Solar→Normal mid-charge: all EVSEs get full current
+ * @given Master with 2 EVSEs in Solar mode with shortage
+ * @when Mode is changed to Normal
+ * @then Both EVSEs get full current (Normal ignores solar/mains constraints)
+ */
+void test_mid_charge_solar_to_normal(void) {
+    evse_init(&ctx, NULL);
+    ctx.AccessStatus = ON;
+    ctx.Mode = MODE_SOLAR;
+    ctx.LoadBl = 1;
+    ctx.MaxCurrent = 16;
+    ctx.MaxCapacity = 16;
+    ctx.MinCurrent = 6;
+    ctx.MaxCircuit = 32;
+    ctx.MaxMains = 25;
+    ctx.ChargeCurrent = 160;
+    ctx.MainsMeterType = 1;
+    ctx.phasesLastUpdateFlag = true;
+    ctx.Nr_Of_Phases_Charging = 3;
+    ctx.StartCurrent = 4;
+    ctx.StopTime = 10;
+    ctx.ImportCurrent = 0;
+
+    for (int i = 0; i < 2; i++) {
+        ctx.BalancedState[i] = STATE_C;
+        ctx.BalancedMax[i] = 160;
+        ctx.Balanced[i] = 60;
+        ctx.Node[i].Online = 1;
+        ctx.Node[i].IntTimer = 100;
+    }
+    ctx.State = STATE_C;
+    ctx.MainsMeterImeasured = 200;  /* Importing = no solar */
+    ctx.Isum = 200;
+    ctx.IsetBalanced = 60;
+    ctx.IsetBalanced_ema = 60;
+
+    /* Solar mode: shortage, low distribution */
+    evse_calc_balanced_current(&ctx, 0);
+    int32_t solar_total = ctx.Balanced[0] + ctx.Balanced[1];
+
+    /* Switch to Normal (simulating setMode side effects) */
+    ctx.Mode = MODE_NORMAL;
+    ctx.SolarStopTimer = 0;
+    ctx.phasesLastUpdateFlag = true;
+    evse_clear_error_flags(&ctx, LESS_6A);
+
+    evse_calc_balanced_current(&ctx, 0);
+    int32_t normal_total = ctx.Balanced[0] + ctx.Balanced[1];
+
+    /* Normal mode should give substantially more current */
+    TEST_ASSERT_GREATER_THAN(solar_total, normal_total);
+    TEST_ASSERT_GREATER_OR_EQUAL(60, ctx.Balanced[0]);
+    TEST_ASSERT_GREATER_OR_EQUAL(60, ctx.Balanced[1]);
+}
+
+/* ---- Main ---- */
+int main(void) {
+    TEST_SUITE_BEGIN("Mode Synchronization");
+
+    /* Group 1: Phase switching */
+    RUN_TEST(test_solar_off_forces_single_phase_in_solar);
+    RUN_TEST(test_solar_off_allows_3p_in_smart);
+    RUN_TEST(test_state_c_entry_solar_off_opens_c2);
+
+    /* Group 2: Error/timer clearing */
+    RUN_TEST(test_clear_less6a_on_mode_switch);
+    RUN_TEST(test_raw_mode_assign_leaves_timer_stale);
+    RUN_TEST(test_setmode_clears_timer);
+
+    /* Group 3: Mode-dependent regulation */
+    RUN_TEST(test_mid_charge_smart_to_solar);
+    RUN_TEST(test_mid_charge_solar_to_normal);
+
+    TEST_SUITE_RESULTS();
+}