update examples with esp8266 specifics

examples/completeExample/completeExample.cpp

@@ -26,8 +26,18 @@
 #include <WiFi.h>
 #include <ESPmDNS.h>
 #else
+// esp8266
 #include <ESP8266WiFi.h>
 #include <ESP8266mDNS.h>
+#include <umm_malloc/umm_heap_select.h>
+#ifndef MMU_IRAM_HEAP
+#warning Try MMU option '2nd heap shared' in 'tools' IDE menu (cf. https://arduino-esp8266.readthedocs.io/en/latest/mmu.html#option-summary)
+#warning use decorators: { HeapSelectIram doAllocationsInIRAM; ESPUI.addControl(...) ... } (cf. https://arduino-esp8266.readthedocs.io/en/latest/mmu.html#how-to-select-heap)
+#warning then check http://<ip>/heap
+#endif // MMU_IRAM_HEAP
+#ifndef DEBUG_ESP_OOM
+#error on ESP8266 and ESPUI, you must define OOM debug option when developping
+#endif
 #endif
 
 //Settings
@@ -62,6 +72,11 @@ volatile bool updates = false;
 
 // This is the main function which builds our GUI
 void setUpUI() {
+
+#ifdef ESP8266
+    { HeapSelectIram doAllocationsInIRAM;
+#endif
+
 	//Turn off verbose debugging
 	ESPUI.setVerbosity(Verbosity::Quiet);
 
@@ -274,6 +289,11 @@ void setUpUI() {
 	//Finally, start up the UI. 
 	//This should only be called once we are connected to WiFi.
 	ESPUI.begin(HOSTNAME);
+
+#ifdef ESP8266
+    } // HeapSelectIram
+#endif
+
 }
 
 //This callback generates and applies inline styles to a bunch of controls to change their colour.

examples/completeExample/completeExample.ino

@@ -0,0 +1 @@
+// placeholder