Maxxfan Controller
"
"
Status
Mode: OFF
Speed: 0%
"
"
Target: 0%
State: IDLE
"
+"
Last ON: EXHAUST @ 50%
"
"
Ramping...
"
"
Direction change cooldown: 0s
"
"
Error
Connecting..."
"
Fan Control
"
+""
""
""
"
Speed Control
"
@@ -126,7 +145,11 @@ static const char* html_page =
"document.getElementById('connectionStatus').textContent='Error'}"
"function hideError(){document.getElementById('errorStatus').style.display='none';"
"document.getElementById('connectionStatus').textContent='Connected';errorCount=0}"
-"function setFan(mode,speed){currentSpeed=speed;document.getElementById('speedSlider').value=speed;"
+"function setFan(mode,speed){if(mode==='on'){fetch('/fan',{method:'POST',headers:{'Content-Type':'application/json'},"
+"body:JSON.stringify({mode:'on',speed:0})})"
+".then(r=>{if(!r.ok)throw new Error('HTTP '+r.status);return r.json()})"
+".then(d=>{updateStatus(d);hideError()}).catch(e=>{console.error(e);showError(e.message)});return;}"
+"currentSpeed=speed;document.getElementById('speedSlider').value=speed;"
"document.getElementById('speedValue').textContent=speed;fetch('/fan',{method:'POST',"
"headers:{'Content-Type':'application/json'},body:JSON.stringify({mode:mode,speed:parseInt(speed)})})"
".then(r=>{if(!r.ok)throw new Error('HTTP '+r.status);return r.json()})"
@@ -139,6 +162,7 @@ static const char* html_page =
"document.getElementById('speed').textContent=data.current_speed;"
"document.getElementById('target').textContent=data.target_speed;"
"document.getElementById('state').textContent=data.state.toUpperCase();"
+"if(data.last_on_mode&&data.last_on_speed){document.getElementById('lastOn').textContent=data.last_on_mode.toUpperCase()+' @ '+data.last_on_speed+'%';}"
"document.getElementById('rampStatus').style.display=data.ramping?'block':'none';"
"let cooldownDiv=document.getElementById('cooldownStatus');"
"if(data.cooldown_remaining>0){cooldownDiv.style.display='block';"
@@ -153,6 +177,10 @@ static void motor_ramp_timer_callback(TimerHandle_t xTimer);
static void motor_cooldown_timer_callback(TimerHandle_t xTimer);
static void apply_motor_pwm(int speed_percent);
static void start_motor_operation(motor_mode_t mode, int speed_percent);
+static esp_err_t save_motor_state_to_nvs(void);
+static esp_err_t load_motor_state_from_nvs(void);
+static bool is_watchdog_reset(void);
+static void save_last_on_state(motor_mode_t mode, int speed);
// Initialize watchdog timer
void init_watchdog(void) {
@@ -182,6 +210,174 @@ void feed_watchdog(void) {
}
}
+// Check if this was a watchdog reset
+static bool is_watchdog_reset(void) {
+ esp_reset_reason_t reset_reason = esp_reset_reason();
+
+ // Only consider TASK_WDT and INT_WDT as true watchdog resets
+ // ESP_RST_WDT can be triggered by power disconnection, so we exclude it
+ return (reset_reason == ESP_RST_TASK_WDT ||
+ reset_reason == ESP_RST_INT_WDT);
+}
+
+// Save motor state to NVS
+static esp_err_t save_motor_state_to_nvs(void) {
+ nvs_handle_t nvs_handle;
+ esp_err_t err;
+
+ err = nvs_open(NVS_NAMESPACE, NVS_READWRITE, &nvs_handle);
+ if (err != ESP_OK) {
+ ESP_LOGE(TAG, "Error opening NVS handle: %s", esp_err_to_name(err));
+ return err;
+ }
+
+ ESP_LOGI(TAG, "=== SAVING STATE TO NVS ===");
+ ESP_LOGI(TAG, "Mode: %d, Speed: %d%%, Last ON: %d@%d%%, User OFF: %s",
+ motor_state.mode, motor_state.target_speed,
+ motor_state.last_on_mode, motor_state.last_on_speed,
+ motor_state.user_turned_off ? "YES" : "NO");
+
+ // Save current motor state
+ err = nvs_set_u8(nvs_handle, NVS_KEY_MODE, (uint8_t)motor_state.mode);
+ if (err == ESP_OK) {
+ err = nvs_set_u8(nvs_handle, NVS_KEY_SPEED, (uint8_t)motor_state.target_speed);
+ }
+
+ // Save last ON state
+ if (err == ESP_OK) {
+ err = nvs_set_u8(nvs_handle, NVS_KEY_LAST_ON_MODE, (uint8_t)motor_state.last_on_mode);
+ }
+ if (err == ESP_OK) {
+ err = nvs_set_u8(nvs_handle, NVS_KEY_LAST_ON_SPEED, (uint8_t)motor_state.last_on_speed);
+ }
+
+ // Save power state (whether user turned off manually)
+ if (err == ESP_OK) {
+ err = nvs_set_u8(nvs_handle, NVS_KEY_POWER_STATE, motor_state.user_turned_off ? 1 : 0);
+ }
+
+ if (err == ESP_OK) {
+ err = nvs_commit(nvs_handle);
+ if (err == ESP_OK) {
+ ESP_LOGI(TAG, "✓ Motor state successfully saved to NVS");
+ } else {
+ ESP_LOGE(TAG, "✗ NVS commit failed: %s", esp_err_to_name(err));
+ }
+ } else {
+ ESP_LOGE(TAG, "✗ Error saving to NVS: %s", esp_err_to_name(err));
+ }
+ ESP_LOGI(TAG, "===========================");
+
+ nvs_close(nvs_handle);
+ return err;
+}
+
+// Load motor state from NVS
+static esp_err_t load_motor_state_from_nvs(void) {
+ nvs_handle_t nvs_handle;
+ esp_err_t err;
+
+ err = nvs_open(NVS_NAMESPACE, NVS_READONLY, &nvs_handle);
+ if (err != ESP_OK) {
+ ESP_LOGI(TAG, "NVS not found, using default state");
+ return ESP_ERR_NVS_NOT_FOUND;
+ }
+
+ uint8_t stored_mode = 0;
+ uint8_t stored_speed = 0;
+ uint8_t stored_last_mode = 1; // Default to MOTOR_EXHAUST
+ uint8_t stored_last_speed = 50;
+ uint8_t stored_power_state = 0;
+
+ // Load current motor state
+ err = nvs_get_u8(nvs_handle, NVS_KEY_MODE, &stored_mode);
+ if (err == ESP_OK) {
+ nvs_get_u8(nvs_handle, NVS_KEY_SPEED, &stored_speed);
+ nvs_get_u8(nvs_handle, NVS_KEY_LAST_ON_MODE, &stored_last_mode);
+ nvs_get_u8(nvs_handle, NVS_KEY_LAST_ON_SPEED, &stored_last_speed);
+ nvs_get_u8(nvs_handle, NVS_KEY_POWER_STATE, &stored_power_state);
+
+ // Validate ranges
+ if (stored_mode > MOTOR_INTAKE) stored_mode = MOTOR_OFF;
+ if (stored_speed > 100) stored_speed = 0;
+ if (stored_last_mode < MOTOR_EXHAUST || stored_last_mode > MOTOR_INTAKE) stored_last_mode = MOTOR_EXHAUST;
+ if (stored_last_speed > 100) stored_last_speed = 50;
+
+ motor_state.last_on_mode = (motor_mode_t)stored_last_mode;
+ motor_state.last_on_speed = stored_last_speed;
+ motor_state.user_turned_off = (stored_power_state == 1);
+
+ ESP_LOGI(TAG, "Loaded state from NVS - Mode: %d, Speed: %d%%, Last ON: %d@%d%%, User OFF: %s",
+ stored_mode, stored_speed, motor_state.last_on_mode, motor_state.last_on_speed,
+ motor_state.user_turned_off ? "YES" : "NO");
+
+ // Check reset reason to decide whether to restore state
+ bool was_watchdog_reset = is_watchdog_reset();
+ esp_reset_reason_t reset_reason = esp_reset_reason();
+
+ ESP_LOGI(TAG, "=== RESET ANALYSIS ===");
+ ESP_LOGI(TAG, "Reset reason: %d", reset_reason);
+ ESP_LOGI(TAG, "Reset reason name: %s",
+ reset_reason == ESP_RST_POWERON ? "POWERON" :
+ reset_reason == ESP_RST_EXT ? "EXTERNAL" :
+ reset_reason == ESP_RST_SW ? "SOFTWARE" :
+ reset_reason == ESP_RST_PANIC ? "PANIC" :
+ reset_reason == ESP_RST_INT_WDT ? "INT_WDT" :
+ reset_reason == ESP_RST_TASK_WDT ? "TASK_WDT" :
+ reset_reason == ESP_RST_WDT ? "WDT" :
+ reset_reason == ESP_RST_DEEPSLEEP ? "DEEPSLEEP" :
+ reset_reason == ESP_RST_BROWNOUT ? "BROWNOUT" :
+ reset_reason == ESP_RST_SDIO ? "SDIO" : "UNKNOWN");
+ ESP_LOGI(TAG, "Watchdog reset: %s", was_watchdog_reset ? "YES" : "NO");
+ ESP_LOGI(TAG, "Stored mode: %d, speed: %d", stored_mode, stored_speed);
+ ESP_LOGI(TAG, "User turned off: %s", motor_state.user_turned_off ? "YES" : "NO");
+ ESP_LOGI(TAG, "====================");
+
+ if (was_watchdog_reset) {
+ // True watchdog reset (TASK_WDT or INT_WDT) - don't restore state, start fresh
+ ESP_LOGI(TAG, "⚠️ TRUE watchdog reset detected - starting in OFF state for safety");
+ motor_state.mode = MOTOR_OFF;
+ motor_state.target_speed = 0;
+ motor_state.current_speed = 0;
+ motor_state.user_turned_off = false; // Reset user off flag
+ } else if (motor_state.user_turned_off) {
+ // User manually turned off - stay off
+ ESP_LOGI(TAG, "🔒 User had turned off manually - staying OFF");
+ motor_state.mode = MOTOR_OFF;
+ motor_state.target_speed = 0;
+ motor_state.current_speed = 0;
+ } else if (stored_mode != MOTOR_OFF && stored_speed > 0) {
+ // Normal power loss or general WDT (which can be power-related) - restore previous state
+ ESP_LOGI(TAG, "🔋 Power restored - will resume previous state: %s @ %d%%",
+ stored_mode == MOTOR_EXHAUST ? "EXHAUST" : "INTAKE", stored_speed);
+ motor_state.mode = (motor_mode_t)stored_mode;
+ motor_state.target_speed = stored_speed;
+ motor_state.current_speed = 0; // Always start ramping from 0
+ } else {
+ ESP_LOGI(TAG, "❌ No valid state to restore (mode=%d, speed=%d)", stored_mode, stored_speed);
+ motor_state.mode = MOTOR_OFF;
+ motor_state.target_speed = 0;
+ motor_state.current_speed = 0;
+ }
+ } else {
+ ESP_LOGI(TAG, "No saved state found, using defaults");
+ err = ESP_ERR_NVS_NOT_FOUND;
+ }
+
+ nvs_close(nvs_handle);
+ return err;
+}
+
+// Save the last ON state (for ON button functionality)
+static void save_last_on_state(motor_mode_t mode, int speed) {
+ if (mode != MOTOR_OFF && speed > 0) {
+ motor_state.last_on_mode = mode;
+ motor_state.last_on_speed = speed;
+ ESP_LOGI(TAG, "Last ON state updated: %s @ %d%%",
+ mode == MOTOR_EXHAUST ? "EXHAUST" : "INTAKE", speed);
+ }
+}
+
// WiFi event handler
static void event_handler(void* arg, esp_event_base_t event_base,
int32_t event_id, void* event_data)
@@ -368,6 +564,9 @@ static void start_motor_operation(motor_mode_t mode, int speed_percent) {
apply_motor_pwm(0);
ESP_LOGI(TAG, "Motor stopped immediately");
} else {
+ // Save last ON state for future ON button use
+ save_last_on_state(mode, speed_percent);
+
// Start from minimum speed if currently off
if (motor_state.current_speed == 0) {
int start_speed = (speed_percent < MIN_MOTOR_SPEED) ? speed_percent : MIN_MOTOR_SPEED;
@@ -384,6 +583,9 @@ static void start_motor_operation(motor_mode_t mode, int speed_percent) {
motor_state.ramping = false;
}
}
+
+ // Save state to NVS after any change
+ save_motor_state_to_nvs();
}
// Initialize motor ramping system
@@ -423,11 +625,21 @@ void set_motor_speed(motor_mode_t mode, int speed_percent)
motor_state.current_speed,
motor_state.state);
+ // Track if user manually turned off
+ if (mode == MOTOR_OFF && motor_state.mode != MOTOR_OFF) {
+ motor_state.user_turned_off = true;
+ ESP_LOGI(TAG, "User manually turned OFF - will stay off after restart");
+ } else if (mode != MOTOR_OFF) {
+ motor_state.user_turned_off = false;
+ ESP_LOGI(TAG, "Motor turned ON - will resume after power loss");
+ }
+
// If we're in cooldown, update the pending command
if (motor_state.state == MOTOR_STATE_COOLDOWN) {
motor_state.pending_mode = mode;
motor_state.pending_speed = speed_percent;
ESP_LOGI(TAG, "Motor in cooldown - command queued for execution");
+ save_motor_state_to_nvs(); // Save the pending state
return;
}
@@ -466,6 +678,9 @@ void set_motor_speed(motor_mode_t mode, int speed_percent)
ESP_LOGI(TAG, "Motor stopped for direction change - %d second cooldown started",
DIRECTION_CHANGE_COOLDOWN_MS / 1000);
+
+ // Save state including pending command
+ save_motor_state_to_nvs();
} else {
// No direction change required, proceed normally
@@ -530,12 +745,17 @@ static esp_err_t status_get_handler(httpd_req_t *req)
default: state_str = "idle"; break;
}
+ const char* last_on_mode_str = "exhaust";
+ if (motor_state.last_on_mode == MOTOR_INTAKE) last_on_mode_str = "intake";
+
cJSON_AddStringToObject(json, "mode", mode_str);
cJSON_AddNumberToObject(json, "current_speed", motor_state.current_speed);
cJSON_AddNumberToObject(json, "target_speed", motor_state.target_speed);
cJSON_AddStringToObject(json, "state", state_str);
cJSON_AddBoolToObject(json, "ramping", motor_state.ramping);
cJSON_AddNumberToObject(json, "cooldown_remaining", motor_state.cooldown_remaining_ms);
+ cJSON_AddStringToObject(json, "last_on_mode", last_on_mode_str);
+ cJSON_AddNumberToObject(json, "last_on_speed", motor_state.last_on_speed);
// Add pending command info if in cooldown
if (motor_state.state == MOTOR_STATE_COOLDOWN) {
@@ -613,7 +833,14 @@ static esp_err_t fan_post_handler(httpd_req_t *req)
}
motor_mode_t mode = MOTOR_OFF;
- if (strcmp(mode_str, "exhaust") == 0) {
+
+ // Handle special "ON" command - resume last settings
+ if (strcmp(mode_str, "on") == 0) {
+ mode = motor_state.last_on_mode;
+ speed = motor_state.last_on_speed;
+ ESP_LOGI(TAG, "ON button pressed - resuming %s @ %d%%",
+ mode == MOTOR_EXHAUST ? "EXHAUST" : "INTAKE", speed);
+ } else if (strcmp(mode_str, "exhaust") == 0) {
mode = MOTOR_EXHAUST;
} else if (strcmp(mode_str, "intake") == 0) {
mode = MOTOR_INTAKE;
@@ -756,19 +983,9 @@ void wifi_init_sta(void)
}
}
-// Main application task with watchdog feeding
-void main_task(void *pvParameters) {
- ESP_LOGI(TAG, "Main task started");
-
- while (1) {
- feed_watchdog();
- vTaskDelay(pdMS_TO_TICKS(5000)); // Feed watchdog every 5 seconds
- }
-}
-
void app_main(void)
{
- ESP_LOGI(TAG, "Starting Maxxfan HTTP Controller with Direction Change Safety!");
+ ESP_LOGI(TAG, "Starting Maxxfan HTTP Controller with State Preservation!");
// Initialize NVS
esp_err_t ret = nvs_flash_init();
@@ -788,15 +1005,39 @@ void app_main(void)
// Initialize motor ramping system
init_motor_ramping();
+ // Load saved state from NVS
+ ESP_LOGI(TAG, "Loading saved state...");
+ load_motor_state_from_nvs();
+
ESP_LOGI(TAG, "Connecting to WiFi network: %s", WIFI_SSID);
wifi_init_sta();
// Start HTTP server
start_webserver();
+ // Restore motor state if needed (after WiFi is connected and server is running)
+ ESP_LOGI(TAG, "=== MOTOR STATE RESTORATION ===");
+ ESP_LOGI(TAG, "Current motor state: mode=%d, target=%d%%, current=%d%%",
+ motor_state.mode, motor_state.target_speed, motor_state.current_speed);
+
+ if (motor_state.mode != MOTOR_OFF && motor_state.target_speed > 0) {
+ ESP_LOGI(TAG, "Restoring motor state: %s @ %d%%",
+ motor_state.mode == MOTOR_EXHAUST ? "EXHAUST" : "INTAKE",
+ motor_state.target_speed);
+
+ // Start the motor with current settings
+ motor_state.current_speed = 0; // Start from 0 and ramp up
+ start_motor_operation(motor_state.mode, motor_state.target_speed);
+ ESP_LOGI(TAG, "Motor restoration initiated");
+ } else {
+ ESP_LOGI(TAG, "No motor state to restore - staying OFF");
+ }
+ ESP_LOGI(TAG, "===============================");
+
ESP_LOGI(TAG, "=== Enhanced Maxxfan Controller Ready! ===");
- ESP_LOGI(TAG, "Features: Motor Ramping, Direction Change Safety, Real-time Updates");
+ ESP_LOGI(TAG, "Features: State Preservation, Direction Safety, Motor Ramping, ON Button");
ESP_LOGI(TAG, "Safety: 10-second cooldown for direction changes");
+ ESP_LOGI(TAG, "Memory: Remembers settings after power loss (except watchdog resets)");
ESP_LOGI(TAG, "Open your browser and go to: http://[ESP32_IP_ADDRESS]");
ESP_LOGI(TAG, "Check the monitor output above for your IP address");