diff --git a/tools/ESP32-Chip_info.hpp b/tools/ESP32-Chip_info.hpp
index e1a1cf25..f8563ab8 100644
--- a/tools/ESP32-Chip_info.hpp
+++ b/tools/ESP32-Chip_info.hpp
@@ -502,6 +502,7 @@ void show_psram_info_part2(void)
     }
   #endif
 
+  #if 0  // this test makes the "max used PSRAM" info unusable
   // try to allocate PSRAM (one 640KB chunk so we can be sure it will not fit into DRAM)
   void * buff2 = ps_malloc(640 * 1024);
   uint8_t * buf = (uint8_t*)malloc(620 * 1024);
@@ -518,6 +519,7 @@ void show_psram_info_part2(void)
     free(buf);
     Serial.println("* Can allocate big memory with malloc()");
   }
+  #endif
 
 #endif
 }
diff --git a/wled00/data/index.js b/wled00/data/index.js
index c88581bc..de330f70 100644
--- a/wled00/data/index.js
+++ b/wled00/data/index.js
@@ -667,16 +667,19 @@ ${urows===""?'':'<tr><td colspan=2><hr style="height:1px;border-width:0;color:gr
 ${inforow("Build",i.vid)}
 ${inforow("Signal strength",i.wifi.signal +"% ("+ i.wifi.rssi, " dBm)")}
 ${inforow("Uptime",getRuntimeStr(i.uptime))}
-${theap>0?inforow("Total heap",theap," kB"):""}
-${inforow("Free heap",heap," kB")}
-${i.tpram?inforow("Total PSRAM",(i.tpram/1024).toFixed(1)," kB"):""}
-${i.psram?inforow("Used PSRAM",(i.tpram-i.psram)," B"):""}
 ${inforow("Estimated current",pwru)}
 ${inforow("Average FPS",i.leds.fps)}
+<!-- WLEDSR begin--> 
+<tr><td colspan=2><hr style="height:1px;border-width:0;color:SeaGreen;background-color:SeaGreen"></td></tr>
 ${inforow("MAC address",i.mac)}
 ${inforow("Filesystem",i.fs.u + "/" + i.fs.t + " kB (" +Math.round(i.fs.u*100/i.fs.t) + "%)")}
 ${inforow("Environment",i.arch + " " + i.core + " (" + i.lwip + ")")}
-<!-- WLEDSR begin--> 
+${theap>0?inforow("Total heap",theap," kB"):""}
+${theap>0?inforow("used heap",((i.totalheap-i.freeheap)/1000).toFixed(1)," kB"):inforow("Free heap",heap," kB")}
+${i.minfreeheap?inforow("Max used heap",((i.totalheap-i.minfreeheap)/1000).toFixed(1)," kB"):""}
+${i.tpram?inforow("Total PSRAM",(i.tpram/1024).toFixed(1)," kB"):""}
+${i.psram?((i.tpram-i.psram)>16383?inforow("Used PSRAM",((i.tpram-i.psram)/1024).toFixed(1)," kB"):inforow("Used PSRAM",(i.tpram-i.psram)," B")):""}
+${i.psusedram?((i.tpram-i.psusedram)>16383?inforow("Max Used PSRAM",((i.tpram-i.psusedram)/1024).toFixed(1)," kB"):inforow("Max Used PSRAM",(i.tpram-i.psusedram)," B")):""}
 <tr><td colspan=2><hr style="height:1px;border-width:0;color:SeaGreen;background-color:SeaGreen"></td></tr>
 ${i.e32model?inforow(i.e32model,i.e32cores +" core(s)"," "+i.e32speed+" Mhz"):""}
 ${i.e32flash?inforow("Flash "+i.e32flash+" MB"+", mode "+i.e32flashmode+i.e32flashtext,i.e32flashspeed," Mhz"):""}
diff --git a/wled00/json.cpp b/wled00/json.cpp
index b6a8106e..3b509d75 100644
--- a/wled00/json.cpp
+++ b/wled00/json.cpp
@@ -767,9 +767,18 @@ void serializeInfo(JsonObject root)
   #endif
 
   root[F("freeheap")] = ESP.getFreeHeap();
-  #if defined(ARDUINO_ARCH_ESP32) && defined(WLED_USE_PSRAM)
-  if (psramFound()) root[F("tpram")] = ESP.getPsramSize(); //WLEDSR
-  if (psramFound()) root[F("psram")] = ESP.getFreePsram();
+  root[F("minfreeheap")] = ESP.getMinFreeHeap();
+  #if defined(ARDUINO_ARCH_ESP32) && defined(WLED_USE_PSRAM) && defined(BOARD_HAS_PSRAM)
+  if (psramFound()) {
+    root[F("tpram")] = ESP.getPsramSize(); //WLEDSR
+    root[F("psram")] = ESP.getFreePsram();
+    root[F("psusedram")] = ESP.getMinFreePsram();
+  }
+  #else
+  // for testing
+  //  root[F("tpram")] = 4194304; //WLEDSR
+  //  root[F("psram")] = 4193000;
+  //  root[F("psusedram")] = 3083000;
   #endif
 
   // begin WLEDSR
diff --git a/wled00/util.cpp b/wled00/util.cpp
index 16d31884..3cd369f1 100644
--- a/wled00/util.cpp
+++ b/wled00/util.cpp
@@ -148,8 +148,10 @@ bool oappendi(int i)
 bool oappend(const char* txt)
 {
   uint16_t len = strlen(txt);
-  if (olen + len >= SETTINGS_STACK_BUF_SIZE)
+  if (olen + len >= SETTINGS_STACK_BUF_SIZE) {
+    DEBUG_PRINTLN(F("oappend() error: buffer full. Increase SETTINGS_STACK_BUF_SIZE."));
     return false;        // buffer full
+  }
   strcpy(obuf + olen, txt);
   olen += len;
   return true;
diff --git a/wled00/wled.cpp b/wled00/wled.cpp
index 2de8a6d4..bec2af6f 100644
--- a/wled00/wled.cpp
+++ b/wled00/wled.cpp
@@ -457,6 +457,15 @@ void WLED::setup()
   #if defined(ARDUINO_ARCH_ESP32) && defined(WLED_DISABLE_BROWNOUT_DET)
   WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 1); //enable brownout detector
   #endif
+  
+  #ifdef ARDUINO_ARCH_ESP32
+  #ifdef ARDUINO_RUNNING_CORE
+    DEBUG_PRINTF("Arduino core=%d (loop is now on core #%d)\n", int(ARDUINO_RUNNING_CORE), int(xPortGetCoreID()));
+  #endif
+  #ifdef ARDUINO_EVENT_RUNNING_CORE
+      DEBUG_PRINTF("Arduino Event core=%d\n", int(ARDUINO_EVENT_RUNNING_CORE));
+  #endif
+  #endif
 }
 
 void WLED::beginStrip()