Improved liveview

- Send new liveview frame only if data changed
- Update frequency updated to 250ms
- Fixed firmware release name

extra_script.py

@@ -31,4 +31,4 @@
 
 # Rename binary according to environnement/board
 # ex: firmware_esp32dev.bin or firmware_nodemcuv2.bin
-env.Replace(PROGNAME=f"firmware_v{version}_{build_tag}.bin")
+env.Replace(PROGNAME=f"firmware_v{version}_{build_tag}")

platformio.ini

@@ -32,6 +32,7 @@ lib_deps =
 	ColorConverter=https://github.com/luisllamasbinaburo/Arduino-ColorConverter.git
 	TimeLib = https://github.com/PaulStoffregen/Time.git
 	marcmerlin/FastLED NeoMatrix@^1.2
+	bakercp/CRC32 @ 2.0.0
 
 [env:wemos_d1_mini32]
  platform = espressif32

src/Liveview.cpp

@@ -49,6 +49,13 @@ void Liveview::fillBuffer()
     // set suffix
     memcpy(&_liveviewBuffer[MATRIX_HEIGHT * MATRIX_WIDTH * 6 + _LIVEVIEW_PREFIX_LENGHT], _LIVEVIEW_SUFFIX, _LIVEVIEW_SUFFIX_LENGHT);
 
-    // rise callback
-    callbackFunction(_liveviewBuffer, _LIVEVIEW_BUFFER_LENGHT);
-}
+    // calculate checksum
+    uint32_t newChecksum = CRC32::calculate((byte *)_liveviewBuffer, _LIVEVIEW_BUFFER_LENGHT);
+    if (_lastChecksum != newChecksum)
+    {
+        // Serial.printf("Checksum (new/old): 0x%08X/0x%08X\n", newChecksum, _lastChecksum);
+        _lastChecksum = newChecksum;
+        // rise callback
+        callbackFunction(_liveviewBuffer, _LIVEVIEW_BUFFER_LENGHT);
+    }
+}

src/Liveview.h

@@ -4,6 +4,7 @@
 #include <Arduino.h>
 #include <Adafruit_GFX.h>
 #include <FastLED_NeoMatrix.h>
+#include <CRC32.h>
 
 #define _LIVEVIEW_PREFIX "{\"liveview\":\""
 #define _LIVEVIEW_SUFFIX "\"}"
@@ -24,11 +25,11 @@ class Liveview
     CRGB *_leds;
     uint16_t _interval;
     unsigned long _lastUpdate;
+    uint32_t _lastChecksum;
     char _liveviewBuffer[_LIVEVIEW_BUFFER_LENGHT];
 
     void (*callbackFunction)(const char *, size_t);
     void fillBuffer();
-    char *getBuffer();
 };
 
 #endif

src/PixelIt.ino

@@ -52,7 +52,7 @@
 #define CHECKUPDATE_INTERVAL 1000 * 60 * 6 * 8   // 8 Hours
 #define CHECKUPDATESCREEN_INTERVAL 1000 * 60 * 5 // 5 Minutes
 #define CHECKUPDATESCREEN_DURATION 1000 * 5      // 5 Seconds
-#define SEND_LIVEVIEW_INTERVAL 500               // 0.5 Seconds, 0 to disable
+#define SEND_LIVEVIEW_INTERVAL 250               // 0.5 Seconds, 0 to disable
 
 #define VERSION "0.0.0-beta" // will be replaced by build piple with Git-Tag!