Fix firmware download

src/activities/settings/OtaUpdateActivity.cpp

@@ -31,6 +31,7 @@ void OtaUpdateActivity::onWifiSelectionComplete(const bool success) {
     LOG_DBG("OTA", "Update check failed: %d", res);
     {
       RenderLock lock(*this);
+      failureReason = res;
       state = FAILED;
     }
     return;
@@ -126,6 +127,35 @@ void OtaUpdateActivity::render(RenderLock&&) {
     GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
   } else if (state == FAILED) {
     renderer.drawCenteredText(UI_10_FONT_ID, top, tr(STR_UPDATE_FAILED), true, EpdFontFamily::BOLD);
+    const char* reason = "";
+    switch (failureReason) {
+      case OtaUpdater::HTTP_ERROR:
+        reason = "Network error (HTTP request failed)";
+        break;
+      case OtaUpdater::JSON_PARSE_ERROR:
+        reason = "Could not parse release info";
+        break;
+      case OtaUpdater::UPDATE_OLDER_ERROR:
+        reason = "Available version is not newer";
+        break;
+      case OtaUpdater::OOM_ERROR:
+        reason = "Out of memory";
+        break;
+      case OtaUpdater::INTERNAL_UPDATE_ERROR:
+        reason = "Internal update error";
+        break;
+      case OtaUpdater::NO_UPDATE:
+        reason = "No firmware asset found";
+        break;
+      case OtaUpdater::VALIDATE_FAILED:
+        reason = "Image validation failed - please flash via USB";
+        break;
+      default:
+        break;
+    }
+    if (reason[0] != '\0') {
+      renderer.drawCenteredText(SMALL_FONT_ID, top + height + metrics.verticalSpacing, reason);
+    }
     const auto labels = mappedInput.mapLabels(tr(STR_BACK), "", "", "");
     GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
   } else if (state == FINISHED) {
@@ -151,6 +181,7 @@ void OtaUpdateActivity::loop() {
         LOG_DBG("OTA", "Update begin failed: %d", beginResult);
         {
           RenderLock lock(*this);
+          failureReason = beginResult;
           state = FAILED;
         }
         requestUpdate();
@@ -205,6 +236,7 @@ void OtaUpdateActivity::loop() {
     LOG_DBG("OTA", "Update failed: %d", res);
     {
       RenderLock lock(*this);
+      failureReason = res;
       state = FAILED;
     }
     requestUpdate();

src/activities/settings/OtaUpdateActivity.h

@@ -21,6 +21,7 @@ class OtaUpdateActivity : public Activity {
   State state = WIFI_SELECTION;
   unsigned int lastUpdaterPercentage = UNINITIALIZED_PERCENTAGE;
   OtaUpdater updater;
+  OtaUpdater::OtaUpdaterError failureReason = OtaUpdater::OK;
 
   void onWifiSelectionComplete(bool success);
 

src/network/OtaUpdater.cpp

@@ -52,14 +52,18 @@ esp_err_t event_handler(esp_http_client_event_t* event) {
 } /* namespace */
 
 OtaUpdater::OtaUpdaterError OtaUpdater::checkForUpdate() {
+  // Reset globals so retries start clean regardless of previous outcome
+  local_buf = nullptr;
+  output_len = 0;
+
   JsonDocument filter;
   esp_err_t esp_err;
   JsonDocument doc;
 
   esp_http_client_config_t client_config = {
       .url = latestReleaseUrl,
-      .event_handler = event_handler,
       .timeout_ms = 10000,
+      .event_handler = event_handler,
       /* Default HTTP client buffer size 512 byte only */
       .buffer_size = 8192,
       .buffer_size_tx = 8192,
@@ -282,6 +286,9 @@ OtaUpdater::OtaUpdaterError OtaUpdater::performInstallUpdateStep() {
   if (finish_err != ESP_OK) {
     LOG_ERR("OTA", "esp_https_ota_finish Failed: %s", esp_err_to_name(finish_err));
     cleanupUpdate();
+    if (finish_err == ESP_ERR_OTA_VALIDATE_FAILED) {
+      return VALIDATE_FAILED;
+    }
     return INTERNAL_UPDATE_ERROR;
   }
 

src/network/OtaUpdater.h

@@ -3,7 +3,9 @@
 #include <functional>
 #include <string>
 
-#include "esp_https_ota.h"
+// Avoid pulling in esp_https_ota.h here — it transitively includes lwip/sockets.h
+// which defines INADDR_NONE as a numeric macro, conflicting with Arduino's IPAddress.h.
+typedef void* esp_https_ota_handle_t;
 
 class OtaUpdater {
   bool updateAvailable = false;
@@ -27,6 +29,7 @@ class OtaUpdater {
     OOM_ERROR,
     UPDATE_CANCELLED,
     UPDATE_IN_PROGRESS,
+    VALIDATE_FAILED,
   };
 
   size_t getOtaSize() const { return otaSize; }