diff --git a/boards/esp320.json b/boards/esp320.json
index 979f464..604469e 100644
--- a/boards/esp320.json
+++ b/boards/esp320.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/esp32dev.json b/boards/esp32dev.json
index a33c37c..37c3e0e 100644
--- a/boards/esp32dev.json
+++ b/boards/esp32dev.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/esp32doit-devkit-v1.json b/boards/esp32doit-devkit-v1.json
new file mode 100644
index 0000000..1e1b733
--- /dev/null
+++ b/boards/esp32doit-devkit-v1.json
@@ -0,0 +1,28 @@
+{
+  "build": {
+    "core": "esp32",
+    "extra_flags": "-DESP32_DEV -DARDUINO_ESP32_DEV",
+    "f_cpu": "240000000L",
+    "f_flash": "80000000L",
+    "flash_mode": "dio",
+    "ldscript": "esp32_out.ld",
+    "mcu": "esp32",
+    "variant": "doitESP32devkitV1"
+  },
+  "frameworks": [
+    "arduino",
+    "espidf"
+  ],
+  "name": "DOIT ESP32 DEVKIT V1",
+  "upload": {
+    "flash_size": "4MB",
+    "maximum_ram_size": 294912,
+    "maximum_size": 1310720,
+    "require_upload_port": true,
+    "resetmethod": "nodemcu",
+    "speed": 115200,
+    "wait_for_upload_port": true
+  },
+  "url": "http://www.doit.am/",
+  "vendor": "DOIT"
+}
diff --git a/boards/esp32thing.json b/boards/esp32thing.json
index 0e237ea..0e250db 100644
--- a/boards/esp32thing.json
+++ b/boards/esp32thing.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/esp32vn-iot-uno.json b/boards/esp32vn-iot-uno.json
new file mode 100644
index 0000000..0be6631
--- /dev/null
+++ b/boards/esp32vn-iot-uno.json
@@ -0,0 +1,28 @@
+{
+  "build": {
+    "core": "esp32",
+    "extra_flags": "-DESP32_DEV -DARDUINO_esp32vn-iot-uno",
+    "f_cpu": "240000000L",
+    "f_flash": "80000000L",
+    "flash_mode": "dio",
+    "ldscript": "esp32_out.ld",
+    "mcu": "esp32",
+    "variant": "esp32vn-iot-uno"
+  },
+  "frameworks": [
+    "arduino",
+    "espidf"
+  ],
+  "name": "ESP32vn IoT Uno",
+  "upload": {
+    "flash_size": "4MB",
+    "maximum_ram_size": 294912,
+    "maximum_size": 1044464,
+    "require_upload_port": true,
+    "resetmethod": "nodemcu",
+    "speed": 115200,
+    "wait_for_upload_port": true
+  },
+  "url": "https://esp32.vn/",
+  "vendor": "ESP32vn"
+}
diff --git a/boards/espea32.json b/boards/espea32.json
index bf14219..05bd35d 100644
--- a/boards/espea32.json
+++ b/boards/espea32.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB", 
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/featheresp32.json b/boards/featheresp32.json
index e730448..abeaca2 100644
--- a/boards/featheresp32.json
+++ b/boards/featheresp32.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/firebeetle32.json b/boards/firebeetle32.json
index 07258ad..80a7473 100644
--- a/boards/firebeetle32.json
+++ b/boards/firebeetle32.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/hornbill32dev.json b/boards/hornbill32dev.json
index b0275d2..a84d3f6 100644
--- a/boards/hornbill32dev.json
+++ b/boards/hornbill32dev.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/hornbill32minima.json b/boards/hornbill32minima.json
index a2d6ab8..1927de2 100644
--- a/boards/hornbill32minima.json
+++ b/boards/hornbill32minima.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/intorobot.json b/boards/intorobot.json
index 1631418..06c08e9 100644
--- a/boards/intorobot.json
+++ b/boards/intorobot.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/lolin32.json b/boards/lolin32.json
index 01929ef..272e1db 100644
--- a/boards/lolin32.json
+++ b/boards/lolin32.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/nano32.json b/boards/nano32.json
index 547bfd0..b970179 100644
--- a/boards/nano32.json
+++ b/boards/nano32.json
@@ -19,7 +19,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/node32s.json b/boards/node32s.json
index c7731e4..a7f351f 100644
--- a/boards/node32s.json
+++ b/boards/node32s.json
@@ -16,8 +16,8 @@
   "name": "Node32s",
   "upload": {
     "flash_size": "4MB",
-    "maximum_ram_size": 114688,
-    "maximum_size": 1044464,
+    "maximum_ram_size": 294912,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/nodemcu-32s.json b/boards/nodemcu-32s.json
index 2e07260..29c8257 100644
--- a/boards/nodemcu-32s.json
+++ b/boards/nodemcu-32s.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/onehorse32dev.json b/boards/onehorse32dev.json
index 59eb09b..dd6e143 100644
--- a/boards/onehorse32dev.json
+++ b/boards/onehorse32dev.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "4MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/quantum.json b/boards/quantum.json
index 1edb1c3..cd0a046 100644
--- a/boards/quantum.json
+++ b/boards/quantum.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "16MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,
diff --git a/boards/widora-air.json b/boards/widora-air.json
index 2083ebf..b323e75 100644
--- a/boards/widora-air.json
+++ b/boards/widora-air.json
@@ -17,7 +17,7 @@
   "upload": {
     "flash_size": "16MB",
     "maximum_ram_size": 294912,
-    "maximum_size": 1044464,
+    "maximum_size": 1310720,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
     "speed": 115200,