Feature: Redirect all ESP log output to the MessageOutput handler

include/MessageOutput.h

@@ -19,6 +19,8 @@ public:
     size_t write(const uint8_t* buffer, size_t size) override;
     void register_ws_output(AsyncWebSocket* output);
 
+    static int log_vprintf(const char *fmt, va_list arguments);
+
 private:
     void loop();
 

platformio.ini

@@ -31,6 +31,13 @@ build_flags =
     -DCONFIG_ASYNC_TCP_QUEUE_SIZE=128
     -DEMC_TASK_STACK_SIZE=6400
 ;   -DHOY_DEBUG_QUEUE
+
+;   Log related defines
+    -DUSE_ESP_IDF_LOG
+    -DLOG_LOCAL_LEVEL=5
+    -DCORE_DEBUG_LEVEL=5
+    -DTAG="\"CORE\""
+
     -Wall -Wextra -Wunused -Wmisleading-indentation -Wduplicated-cond -Wlogical-op -Wnull-dereference
 ;   Have to remove -Werror because of
 ;   https://github.com/espressif/arduino-esp32/issues/9044 and

src/MessageOutput.cpp

@@ -19,6 +19,7 @@ void MessageOutputClass::init(Scheduler& scheduler)
 {
     scheduler.addTask(_loopTask);
     _loopTask.enable();
+    esp_log_set_vprintf(log_vprintf);
 }
 
 void MessageOutputClass::register_ws_output(AsyncWebSocket* output)
@@ -28,6 +29,13 @@ void MessageOutputClass::register_ws_output(AsyncWebSocket* output)
     _ws = output;
 }
 
+int MessageOutputClass::log_vprintf(const char* fmt, va_list arguments)
+{
+    char log_buffer[WS_CHUNK_SIZE_BYTES];
+    vsnprintf(log_buffer, sizeof(log_buffer), fmt, arguments);
+    return MessageOutput.print(log_buffer);
+}
+
 void MessageOutputClass::serialWrite(MessageOutputClass::message_t const& m)
 {
     // operator bool() of HWCDC returns false if the device is not attached to