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--- arduino-docs [2015/04/01 20:53]
cimba007
+++ arduino-docs [2015/07/19 01:19] (current)
apedro [EEPROM]
@@ Line 8: / Line 8: @@
 ==== Wire ====
 content
 ==== EEPROM ====
+EEPROM functionality is similar to the standard Arduino library with the exception of having to declare memory size and committing writes.
+===example===
+<code c++>
+#include <EEPROM.h>
-content
+void setup()
+{
+     //Init EEPROM, note the size requirement. I believe 4096B is the maximum available.
+     //You could use a smaller amount/size.
+     EEPROM.begin(4096);
+     for( int i = 0; i < 4096; i++ )
+     {
+          EEPROM.write(i,i);
+     }
+     EEPROM.commit(); //note here the commit!
+}
+</code>
+NOTE: EEPROMAnything can be used with one simple modification.
+Find the EEPROMAnything.h and add EEPROM.commit(); after the EEPROM.write(ee++, *p++);
+EEPROMAnything provides nice functionality to save any type of variable including structers.
+<code c++>
+#include <EEPROMAnything.h>
+struct eepromInfoType
+{
+     uint8_t MyUnsigned8BitInt;
+     char MyCharArray[25]
+} myStructOriginal, myStructCopy;
+void setup()
+{
+     myStructOriginal.MyUnsigned8BitInt = 0; //assign some value
+     strcpy( myStructOriginal.MyCharArray, "Less than 25 chars" ); //assign some value
+     EEPROM_writeAnything( 0, myStructOriginal ); //remember to modify EEPROM_writeAnything by adding   .commit().
+     //Lets read it back
+     EEPROM_readAnything( 0, myStructCopy );
+}
+void loop()
+{
+//nothing here
+}
+</code>
 ===== ESP Specific Libs =====
-===== SDK-API (1.0.0) =====
+==== SDK-API (1.0.0) ====
+If you want to use some the the SDK-API functions have a look at this link
+http://bbs.espressif.com/viewtopic.php?f=5&t=286
+The Documentation can be found here
+http://bbs.espressif.com/download/file.php?id=253
+To use the API you have to include some header-files in your sketch. Below is a quick example of using the RTC-Memory-Write API to make a counter persistent even after using sleep + the following reset.
+<code c>
+#include <Streaming.h>
+// Include API-Headers
+extern "C" {
+#include "ets_sys.h"
+#include "os_type.h"
+#include "osapi.h"
+#include "mem.h"
+#include "user_interface.h"
+#include "cont.h"
+}
+// Counter
+uint32_t i = 0;
+// Temporary buffer
+uint32_t b = 0;
+void setup() {
+  Serial.begin(115200);
+  // Call API-Function
+  system_deep_sleep_set_option(4);
+  // Call API-Function
+  system_rtc_mem_read(64,&b,4) << endl;
+  // Check if the value is within expected range
+  if(b < 100000)
+    i = b;
+}
+int lap = 0;
+void loop() {
+  for(int c = 0; c < 50; c++)
+  {
+    Serial << i++ << " " << lap << endl;
+    delay(10);
+  }
+  // Call API-Function
+  system_rtc_mem_write(64,&i,4) << endl;
+  delay(1000);
+  // Call API-Function
+  system_deep_sleep(10000000);
+  lap++;
+}
+</code>
 ==== ESP8266WiFi ====
-content
+**Connect with static IP**
+If you experience problems regarding DNS resolving check out https://github.com/esp8266/Arduino/issues/369
+<code c>
+#include <ESP8266WiFi.h>
+#include <WiFiClient.h>
+#include <IPAddress.h>
+const char* ssid = ".....";
+const char* password = ".....";
+void setup(void)
+{
+  Serial.begin(115200);
+  // Connect to WiFi network
+  WiFi.begin(ssid, password);
+  //set static ip part
+  WiFi.config(IPAddress(192,168,1,118), IPAddress(192,168,1,1), IPAddress(255,255,255,0));
+  // Wait for connection
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(200);
+  }
+  Serial.println(WiFi.localIP());
+}
+</code>
 ==== ESP8266mDNS ====

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