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dashboard: throttle lvgl label updates

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This commit is contained in:
nick
2026-06-09 22:18:53 -06:00
parent 9cd26cb463
commit c3b3001fdc
1 changed files with 28 additions and 11 deletions
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firmware/esp32-s3-dashboard/esp32-s3-dashboard.ino
+28 -11
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@@ -24,14 +24,25 @@ static lv_obj_t *touch_count_label = nullptr;
static uint32_t touch_count = 0;
static unsigned long last_wifi_attempt_ms = 0;
static unsigned long last_wifi_label_update_ms = 0;
static unsigned long last_status_poll_ms = 0;
static void set_label_text(lv_obj_t *label, const String &text)
static String last_wifi_label_text;
static String last_api_label_text;
static String last_status_label_text;
static void set_label_text_if_changed(lv_obj_t *label, String &last_text, const String &text)
{
if (label == nullptr) {
return;
}
if (last_text == text) {
return;
}
last_text = text;
lvgl_port_lock(-1);
lv_label_set_text(label, text.c_str());
lvgl_port_unlock();
@@ -70,7 +81,7 @@ static void connect_wifi_if_needed()
Serial.print("Connecting to Cargo ESP AP: ");
Serial.println(CARGO_WIFI_SSID);
set_label_text(wifi_label, "WiFi: connecting...");
set_label_text_if_changed(wifi_label, last_wifi_label_text, "WiFi: connecting...");
WiFi.mode(WIFI_STA);
WiFi.begin(CARGO_WIFI_SSID, CARGO_WIFI_PASSWORD);
@@ -78,23 +89,29 @@ static void connect_wifi_if_needed()
static void update_wifi_label()
{
if (millis() - last_wifi_label_update_ms < 5000) {
return;
}
last_wifi_label_update_ms = millis();
if (WiFi.status() == WL_CONNECTED) {
String text = "WiFi: connected\nIP: ";
text += WiFi.localIP().toString();
text += "\nRSSI: ";
text += String(WiFi.RSSI());
text += " dBm";
set_label_text(wifi_label, text);
set_label_text_if_changed(wifi_label, last_wifi_label_text, text);
} else {
set_label_text(wifi_label, "WiFi: not connected\nSSID: " + String(CARGO_WIFI_SSID));
set_label_text_if_changed(wifi_label, last_wifi_label_text, "WiFi: not connected\nSSID: " + String(CARGO_WIFI_SSID));
}
}
static void poll_status_api()
{
if (WiFi.status() != WL_CONNECTED) {
set_label_text(api_label, "API: waiting for WiFi");
set_label_text(status_label, "No API response yet.");
set_label_text_if_changed(api_label, last_api_label_text, "API: waiting for WiFi");
set_label_text_if_changed(status_label, last_status_label_text, "No API response yet.");
return;
}
@@ -107,7 +124,7 @@ static void poll_status_api()
Serial.print("GET ");
Serial.println(CARGO_API_STATUS_URL);
set_label_text(api_label, "API: requesting /api/v1/status");
set_label_text_if_changed(api_label, last_api_label_text, "API: requesting /api/v1/status");
HTTPClient http;
http.begin(CARGO_API_STATUS_URL);
@@ -123,21 +140,21 @@ static void poll_status_api()
String api_text = "API: HTTP ";
api_text += String(code);
api_text += "\nGET /api/v1/status";
set_label_text(api_label, api_text);
set_label_text_if_changed(api_label, last_api_label_text, api_text);
if (body.length() > 900) {
body = body.substring(0, 900);
body += "\n...truncated...";
}
set_label_text(status_label, body);
set_label_text_if_changed(status_label, last_status_label_text, body);
} else {
String error = "API request failed: ";
error += http.errorToString(code);
Serial.println(error);
set_label_text(api_label, error);
set_label_text(status_label, "No valid response from Cargo ESP.");
set_label_text_if_changed(api_label, last_api_label_text, error);
set_label_text_if_changed(status_label, last_status_label_text, "No valid response from Cargo ESP.");
}
http.end();