Use the WiFi Nina module for storing the OTA image

.github/workflows/compile-examples.yml

@@ -57,7 +57,8 @@ jobs:
               - name: ArduinoECCX08
               - name: RTCZero
               - name: WiFi101
-              - name: WiFiNINA
+              # Use the version of WiFiNINA from the tip of its repository's default branch
+              - source-url: https://github.com/arduino-libraries/WiFiNINA.git
               - name: Arduino_MKRMEM
             sketch-paths: '"examples/utility/Provisioning" "examples/utility/WiFi_Cloud_Blink"'
           # LoRaWAN boards

extras/tools/bin2json.py

@@ -5,7 +5,7 @@
 import base64
 
 CHUNK_SIZE           = 256 # This is the chunk size of how the binary is split on the server side for not overloading the embedded device receive buffers.
-INTER_CHUNK_DELAY_MS = 250 # This is delay between 2 consecutive chunks so as to not over load the embedded device.
+INTER_CHUNK_DELAY_MS = 500 # This is delay between 2 consecutive chunks so as to not over load the embedded device.
 
 if len(sys.argv) != 3:
     print ("Usage: bin2json.py sketch.ota sketch.json")

src/ArduinoIoTCloudTCP.cpp

@@ -29,8 +29,9 @@
   #include "tls/utility/CryptoUtil.h"
 #endif
 
-#include "utility/ota/OTAStorage_SSU.h"
+#include "utility/ota/OTAStorage_SNU.h"
 #include "utility/ota/OTAStorage_SFU.h"
+#include "utility/ota/OTAStorage_SSU.h"
 
 #include "cbor/CBOREncoder.h"
 
@@ -44,6 +45,8 @@ TimeService time_service;
   static OTAStorage_SSU ota_storage_ssu;
 #elif OTA_STORAGE_SFU
   static OTAStorage_SFU ota_storage_sfu;
+#elif OTA_STORAGE_SNU
+  static OTAStorage_SNU ota_storage_snu;
 #endif
 
 /******************************************************************************
@@ -148,6 +151,8 @@ int ArduinoIoTCloudTCP::begin(String brokerAddress, uint16_t brokerPort)
   setOTAStorage(ota_storage_ssu);
 #elif OTA_STORAGE_SFU
   setOTAStorage(ota_storage_sfu);
+#elif OTA_STORAGE_SNU
+  setOTAStorage(ota_storage_snu);
 #endif
 
   return 1;

src/ArduinoIoTCloud_Config.h

@@ -26,6 +26,12 @@
   #define OTA_STORAGE_SFU         (0)
 #endif
 
+#if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT)
+  #define OTA_STORAGE_SNU         (1)
+#else
+  #define OTA_STORAGE_SNU         (0)
+#endif
+
 #ifdef ARDUINO_SAMD_MKRGSM1400
   #define OTA_STORAGE_SSU         (1)
 #else
@@ -36,7 +42,7 @@
  * AUTOMATIC CONFIGURED DEFINES
  ******************************************************************************/
 
-#if OTA_STORAGE_SFU || OTA_STORAGE_SSU
+#if OTA_STORAGE_SFU || OTA_STORAGE_SSU || OTA_STORAGE_SNU
   #define OTA_ENABLED             (1)
 #else
   #define OTA_ENABLED             (0)

src/utility/ota/OTAStorage_SNU.cpp

@@ -0,0 +1,101 @@
+/*
+   This file is part of ArduinoIoTCloud.
+
+   Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+
+   This software is released under the GNU General Public License version 3,
+   which covers the main part of arduino-cli.
+   The terms of this license can be found at:
+   https://www.gnu.org/licenses/gpl-3.0.en.html
+
+   You can be released from the requirements of the above licenses by purchasing
+   a commercial license. Buying such a license is mandatory if you want to modify or
+   otherwise use the software for commercial activities involving the Arduino
+   software without disclosing the source code of your own applications. To purchase
+   a commercial license, send an email to [email protected].
+*/
+
+/******************************************************************************
+ * INCLUDE
+ ******************************************************************************/
+
+#include <ArduinoIoTCloud_Config.h>
+#if OTA_STORAGE_SNU
+
+#include "OTAStorage_SNU.h"
+
+#include <WiFiStorage.h>
+
+/******************************************************************************
+ * CONSTANTS
+ ******************************************************************************/
+
+static char const SNU_UPDATE_FILENAME[]      = "/fs/UPDATE.BIN";
+static char const SNU_TEMP_UPDATE_FILENAME[] = "/fs/UPDATE.BIN.TMP";
+
+/******************************************************************************
+ * PUBLIC MEMBER FUNCTIONS
+ ******************************************************************************/
+
+bool OTAStorage_SNU::init()
+{
+  /* Ensure that there are no remains of previous
+   * aborted downloads still existing in the memory
+   * of the nina module.
+   */
+  WiFiStorage.remove(SNU_TEMP_UPDATE_FILENAME);
+  return true;
+}
+
+bool OTAStorage_SNU::open(char const * /* file_name */)
+{
+  /* There's no need to explicitly open the file
+   * because when writing to it the file will always
+   * be opened with "ab+" mode and closed after each
+   * call to 'write'.
+   */
+  return true;
+}
+
+size_t OTAStorage_SNU::write(uint8_t const * const buf, size_t const num_bytes)
+{
+  WiFiStorageFile file(SNU_TEMP_UPDATE_FILENAME);
+
+  /* We have to write in chunks because otherwise we exceed the size of
+   * the SPI buffer within the nina module.
+   */
+  size_t bytes_written = 0;
+  size_t const WRITE_CHUNK_SIZE = 32;
+
+  for(; bytes_written < (num_bytes - WRITE_CHUNK_SIZE); bytes_written += WRITE_CHUNK_SIZE)
+  {
+    if (file.write(buf + bytes_written, WRITE_CHUNK_SIZE) != WRITE_CHUNK_SIZE)
+      return bytes_written;
+  }
+
+  bytes_written += file.write(buf + bytes_written, num_bytes - bytes_written);
+
+  return bytes_written;
+}
+
+void OTAStorage_SNU::close()
+{
+  /* Files are closed after each file operation on the nina side. */
+}
+
+void OTAStorage_SNU::remove(char const * /* file_name */)
+{
+  WiFiStorage.remove(SNU_TEMP_UPDATE_FILENAME);
+}
+
+bool OTAStorage_SNU::rename(char const * /* old_file_name */, char const * /* new_file_name */)
+{
+  return WiFiStorage.rename(SNU_TEMP_UPDATE_FILENAME, SNU_UPDATE_FILENAME);
+}
+
+void OTAStorage_SNU::deinit()
+{
+  /* Nothing to do */
+}
+
+#endif /* OTA_STORAGE_SNU */

src/utility/ota/OTAStorage_SNU.h

@@ -0,0 +1,55 @@
+/*
+   This file is part of ArduinoIoTCloud.
+
+   Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+
+   This software is released under the GNU General Public License version 3,
+   which covers the main part of arduino-cli.
+   The terms of this license can be found at:
+   https://www.gnu.org/licenses/gpl-3.0.en.html
+
+   You can be released from the requirements of the above licenses by purchasing
+   a commercial license. Buying such a license is mandatory if you want to modify or
+   otherwise use the software for commercial activities involving the Arduino
+   software without disclosing the source code of your own applications. To purchase
+   a commercial license, send an email to [email protected].
+*/
+
+#ifndef ARDUINO_OTA_STORAGE_SNU_H_
+#define ARDUINO_OTA_STORAGE_SNU_H_
+
+/******************************************************************************
+ * INCLUDE
+ ******************************************************************************/
+
+#include <ArduinoIoTCloud_Config.h>
+#if OTA_STORAGE_SNU
+
+#include <SNU.h>
+
+#include "OTAStorage.h"
+
+/******************************************************************************
+ * CLASS DECLARATION
+ ******************************************************************************/
+
+class OTAStorage_SNU : public OTAStorage
+{
+public:
+
+  virtual ~OTAStorage_SNU() { }
+
+
+  virtual bool   init  () override;
+  virtual bool   open  (char const * file_name) override;
+  virtual size_t write (uint8_t const * const buf, size_t const num_bytes) override;
+  virtual void   close () override;
+  virtual void   remove(char const * file_name) override;
+  virtual bool   rename(char const * old_file_name, char const * new_file_name) override;
+  virtual void   deinit() override;
+
+};
+
+#endif /* OTA_STORAGE_SNU */
+
+#endif /* ARDUINO_OTA_STORAGE_SNU_H_ */