diff --git a/PCBs/Wemos Lolin D32/Infos/sch_d32_v1.0.0.pdf b/PCBs/Wemos Lolin D32/Infos/sch_d32_v1.0.0.pdf
new file mode 100644
index 0000000..1f6c423
Binary files /dev/null and b/PCBs/Wemos Lolin D32/Infos/sch_d32_v1.0.0.pdf differ
diff --git a/PCBs/Wemos Lolin32/Infos/LOLIN32_Circuit.png b/PCBs/Wemos Lolin32/Infos/LOLIN32_Circuit.png
new file mode 100644
index 0000000..9b54c65
Binary files /dev/null and b/PCBs/Wemos Lolin32/Infos/LOLIN32_Circuit.png differ
diff --git a/platformio.ini b/platformio.ini
index 6ae8c7a..6f6a504 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -24,7 +24,7 @@ lib_deps_external =
 ; https://github.com/pschatzmann/ESP32-A2DP.git
 
 [env:common]
-build_flags = -DHAL=1 -DHAL=3
+build_flags = -DHAL=1 -DHAL=3 -DHAL=4
 ; Don't forget to run this script if you changed the html-files provided in any way
 extra_scripts =
  pre:processHtml.py
@@ -44,6 +44,7 @@ lib_deps =
 	${common.lib_deps_external}
 
 [env:lolin32]
+;https://docs.platformio.org/en/latest/boards/espressif32/lolin32.html
 platform = espressif32
 board = lolin32
 framework = arduino
@@ -59,6 +60,7 @@ upload_port = /dev/cu.SLAB_USBtoUART
 monitor_port = /dev/cu.SLAB_USBtoUART
 
 [env:lolin_d32]
+;https://docs.platformio.org/en/latest/boards/espressif32/lolin_d32.html
 platform = espressif32
 board = lolin_d32
 framework = arduino
@@ -74,6 +76,7 @@ upload_port = /dev/cu.SLAB_USBtoUART
 monitor_port = /dev/cu.SLAB_USBtoUART
 
 [env:lolin_d32_pro]
+;https://docs.platformio.org/en/latest/boards/espressif32/lolin_d32_pro.html
 platform = espressif32
 board = lolin_d32_pro
 framework = arduino
@@ -87,8 +90,11 @@ lib_deps =
 extra_scripts = ${env:common.extra_scripts}
 upload_port = /dev/cu.wchusbserial1410
 monitor_port = /dev/cu.wchusbserial1410
+build_flags = -DBOARD_HAS_PSRAM
+              -mfix-esp32-psram-cache-issue
 
 [env:nodemcu-32s]
+;https://docs.platformio.org/en/latest/boards/espressif32/nodemcu-32s.html
 platform = espressif32
 board = nodemcu-32s
 framework = arduino
@@ -104,6 +110,7 @@ upload_port = /dev/cu.SLAB_USBtoUART
 monitor_port = /dev/cu.SLAB_USBtoUART
 
 [env:az-delivery-devkit-v4]
+;https://docs.platformio.org/en/latest/boards/espressif32/az-delivery-devkit-v4.html
 platform = espressif32
 board = az-delivery-devkit-v4
 framework = arduino
diff --git a/src/main.cpp b/src/main.cpp
index 1eda696..0ccc166 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4156,6 +4156,7 @@ void setup() {
 
     snprintf(logBuf, serialLoglength, "%s: %u", (char *) FPSTR(freeHeapAfterSetup), ESP.getFreeHeap());
     loggerNl(logBuf, LOGLEVEL_DEBUG);
+    Serial.printf("PSRAM: %u bytes\n", ESP.getPsramSize());
 }
 
 
diff --git a/src/settings-lolin32.h b/src/settings-lolin32.h
index f570d17..e5c6719 100644
--- a/src/settings-lolin32.h
+++ b/src/settings-lolin32.h
@@ -7,8 +7,8 @@
    Infos: https://arduino-projekte.info/wemos-lolin32/
    Caveats: None
    Status:
-    tested with 2x SPI, RC522, SD (by biologist79)
-    tested with 1x SPI, PN5180, MMC (by biologist79)
+    tested with 2x SPI: RC522 & SD (by biologist79)
+    tested with 1x SPI: PN5180, SD (MMC) (by tueddy)
 */
 
 //################## GPIO-configuration ##############################
diff --git a/src/settings-lolin_d32_pro.h b/src/settings-lolin_d32_pro.h
index cc4d50f..6cb1659 100644
--- a/src/settings-lolin_d32_pro.h
+++ b/src/settings-lolin_d32_pro.h
@@ -8,7 +8,7 @@
    Schematics: https://www.wemos.cc/en/latest/_static/files/sch_d32_pro_v2.0.0.pdf
    Caveats: GPIO35 (battery monitoring) + SD can't be changed, it's built in
    Status:
-    tested with 2xSPI & RC522 (by biologist79)
+    tested with 2xSPI: RC522 & SD (by biologist79)
 */
 
 //################## GPIO-configuration ##############################