Add ESP32-S2 Solo board

boards/esp32s2_solo1.json

@@ -0,0 +1,35 @@
+{
+    "build": {
+        "arduino": {
+            "ldscript": "esp32s2_out.ld"
+        },
+        "core": "esp32",
+        "extra_flags": "-DBOARD_HAS_PSRAM -DCORE32SOLO1",
+        "f_cpu": "240000000L",
+        "f_flash": "80000000L",
+        "flash_mode": "dout",
+        "mcu": "esp32s2",
+        "variant": "esp32s2",
+        "partitions": "esp32_partition_app1856k_spiffs320k.csv"
+    },
+    "connectivity": [
+        "wifi"
+    ],
+    "debug": {
+        "openocd_target": "esp32s2.cfg"
+    },
+    "frameworks": [
+        "espidf",
+        "arduino"
+    ],
+    "name": "Espressif Generic ESP32-S2",
+    "upload": {
+        "flash_size": "4MB",
+        "maximum_ram_size": 327680,
+        "maximum_size": 4194304,
+        "require_upload_port": true,
+        "speed": 460800
+    },
+    "url": "https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/hw-reference/esp32s2/user-guide-saola-1-v1.2.html",
+    "vendor": "Espressif"
+}

user_setups/esp32s2/s2-mini-esp32s2_ili9341.ini

@@ -7,7 +7,7 @@
 
 [env:s2-mini-esp32s2_ili9341]
 extends = esp32s2_4mb_v2
-board = esp32s2
+board = esp32s2_solo1
 
 build_flags =
     ${env.build_flags}