From d0e5e3434fe328ffa65e386c5e6935b8002c2df0 Mon Sep 17 00:00:00 2001
From: Luc <8822552+luc-github@users.noreply.github.com>
Date: Sun, 14 Jun 2020 10:53:22 +0200
Subject: [PATCH] Fix sketch size calculation if 1MB flash

---
 esp3d/src/modules/filesystem/esp_filesystem.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/esp3d/src/modules/filesystem/esp_filesystem.cpp b/esp3d/src/modules/filesystem/esp_filesystem.cpp
index 8456aac8..75c46597 100644
--- a/esp3d/src/modules/filesystem/esp_filesystem.cpp
+++ b/esp3d/src/modules/filesystem/esp_filesystem.cpp
@@ -62,9 +62,9 @@ size_t ESP_FileSystem::max_update_size()
     size_t  flashsize = 0;
 #if defined (ARDUINO_ARCH_ESP8266)
     flashsize = ESP.getFlashChipSize();
-    //if higher than 1MB take out SPIFFS
+    //if higher than 1MB or not (no more support for 512KB flash)
     if (flashsize <= 1024 * 1024) {
-        flashsize = (1024 * 1024)-ESP.getSketchSize()-1024;
+        flashsize = (ESP.getFreeSketchSpace() - 0x1000) & 0xFFFFF000;
     } else {
         flashsize = flashsize - ESP.getSketchSize()-totalBytes()-1024;
         //max OTA partition is 1019Kb