show_csv command

ampel-firmware/csv_writer.cpp

 #include "csv_writer.h"
 
-//TODO: Allow CSV download via USB Serial, when requested (e.g. via a Python script)
-
 namespace config {
   // Values should be defined in config.h
   uint16_t csv_interval = CSV_INTERVAL; // [s]
@@ -119,6 +117,7 @@ namespace csv_writer {
 
     sensor_commands::defineIntCallback("csv", setCSVinterval, " 60 (Sets CSV writing interval, in s)");
     sensor_commands::defineCallback("format_filesystem", formatFilesystem, " (Deletes the whole filesystem)");
+    sensor_commands::defineCallback("show_csv", showCSVContent, " (Displays the complete CSV file on Serial)");
   }
 
   File openOrCreate() {
@@ -176,6 +175,21 @@ namespace csv_writer {
     led_effects::showKITTWheel(color::green, 1);
   }
 
+  void showCSVContent() {
+    Serial.print(F("### "));
+    Serial.print(filename);
+    Serial.println(F(" ###"));
+    File csv_file;
+    if (FS_LIB.exists(filename)) {
+      csv_file = FS_LIB.open(filename, "r");
+      while (csv_file.available()) {
+        Serial.write(csv_file.read());
+      }
+      csv_file.close();
+    }
+    Serial.println(F("################"));
+  }
+
   void formatFilesystem() {
     FS_LIB.format();
     led_effects::showKITTWheel(color::blue, 2);

ampel-firmware/csv_writer.h

@@ -27,6 +27,7 @@ namespace csv_writer {
   extern const String filename;
 
   void setCSVinterval(int32_t csv_interval);
+  void showCSVContent();
   void formatFilesystem();
 }