diff --git a/ChangeLog b/ChangeLog
index 6692f889c..93ba702f8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -15,6 +15,7 @@
             Add `E.dumpFreeList` in non-release builds to help with debugging
             Fix mild memory leak in jsvMakeIntoVariableName that caused GC to run more often than normal
             E.toString now tries harder to allocate a Flat String, and works with no-alloc for Uint8Array/FlatStrings
+            WIO_LTE fix SD card initialisation
   
      1v95 : nRF5x: Swap to UART fifo to avoid overrun errors at high baud rates
             Ensure Exceptions/errors are reported on a blank line
diff --git a/libs/wio_lte/jswrap_wio_lte.c b/libs/wio_lte/jswrap_wio_lte.c
index f11d1510b..270b33fb9 100644
--- a/libs/wio_lte/jswrap_wio_lte.c
+++ b/libs/wio_lte/jswrap_wio_lte.c
@@ -139,6 +139,13 @@ void jswrap_wio_lte_setLEDPower(bool pwr) {
   "generate" : "jswrap_wio_lte_init"
 }*/
 void jswrap_wio_lte_init() {
-  // initialise the SD card
-  jsvUnLock(jspEvaluate("(function(){digitalWrite(A15,1);var spi=new SPI();spi.setup({mosi:D2,miso:C8,sck:C12});E.connectSDCard(spi,C11);})();",true));
+  /* initialise the SD card
+   C8   D0  MISO
+   C9   D1  unused
+   C10  D2  unused
+   C11  D3  CS
+   C12  CK  SCK
+   D2  CMD  MOSI
+   */
+  jsvUnLock(jspEvaluate("(function(){digitalWrite([C9,C10],0);var spi=new SPI();spi.setup({mosi:D2,miso:C8,sck:C12});pinMode(C8,\"input_pullup\");digitalWrite(A15,1);E.connectSDCard(spi,C11);})();",true));
 }
diff --git a/scripts/build_platform_config.py b/scripts/build_platform_config.py
index fb137feff..41638ebfa 100644
--- a/scripts/build_platform_config.py
+++ b/scripts/build_platform_config.py
@@ -259,8 +259,8 @@ codeOut("#define RAM_TOTAL ("+str(board.chip['ram'])+"*1024)")
 codeOut("#define FLASH_TOTAL ("+str(board.chip['flash'])+"*1024)")
 codeOut("");
 if LINUX:
-  codeOut('#define RESIZABLE_JSVARS // Allocate variables in blocks using malloc')
-  #codeOut("#define JSVAR_CACHE_SIZE                "+str(200)+" // Number of JavaScript variables in RAM")
+  #codeOut('#define RESIZABLE_JSVARS // Allocate variables in blocks using malloc')
+  codeOut("#define JSVAR_CACHE_SIZE                "+str(60)+" // Number of JavaScript variables in RAM")
 else:
   codeOut("#define JSVAR_CACHE_SIZE                "+str(variables)+" // Number of JavaScript variables in RAM")
   codeOut("#define FLASH_AVAILABLE_FOR_CODE        "+str(int(flash_available_for_code)))