Update

esp32c3-dev-board/firmware/esp32c3-blink/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

esp32c3-dev-board/firmware/esp32c3-blink/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

esp32c3-dev-board/firmware/esp32c3-blink/platformio.ini

@@ -0,0 +1,14 @@
+[env]
+platform = espressif32
+framework = arduino
+monitor_speed = 115200
+monitor_filters = colorize, esp32_exception_decoder
+upload_speed = 460800
+build_type = debug
+lib_deps = 
+  adafruit/Adafruit NeoPixel @ ^1.11.0
+
+[env:esp32-dev-board]
+board = lolin_c3_mini
+build_flags = 
+    -D SERIAL_BAUD=115200

esp32c3-dev-board/firmware/esp32c3-blink/src/main.cpp

@@ -0,0 +1,32 @@
+#include <Arduino.h>
+#include <Adafruit_NeoPixel.h>
+#include <Ticker.h>
+
+#define PIN_LED 8
+#define LED_COUNT 1
+
+Adafruit_NeoPixel pixels(LED_COUNT, PIN_LED, NEO_GRB + NEO_KHZ800);
+Ticker tOn, tOff;
+
+
+void setup()
+{
+  Serial.begin(SERIAL_BAUD);
+  Serial.println(F("Hello,"));
+  Serial.println(F("I'm"));
+  Serial.println(F("ESP32-C3!"));
+
+  tOn.attach_ms(500, [](){
+    pixels.setPixelColor(0, pixels.Color(0, 150, 0));
+    pixels.show();
+  });
+  delay(250);
+  tOff.attach_ms(500, [](){
+    pixels.setPixelColor(0, pixels.Color(0, 0, 0));
+    pixels.show();    
+  
+    Serial.printf("[%ld] %#08lx\n", millis(), random());
+  });
+}
+
+void loop(){}