Add protobuf (https://github.com/google/protobuf) and nanopb (https://github.com/metormote/nanopb) to build example beerduino project (https://github.com/ilyevsky/beerduino) using platformio (http://docs.platformio.org/en/latest/).

src/main.cpp

@@ -0,0 +1,47 @@
+#include <stdint.h>
+#include "Arduino.h"
+
+extern "C" {
+    #include "pb_decode.h"
+    #include "pb_encode.h"
+    #include "beerduino.pb.h"
+}
+
+void setup() {
+    Serial.begin(9600);
+    Serial.println("Hello.");
+}
+
+void loop() {
+}
+
+void serialEvent() {
+  if(Serial.available()) {
+    int packet_size = Serial.read();
+
+    uint8_t in_buffer[256];
+    int bytes_read = Serial.readBytes((char*)in_buffer, packet_size);
+    if (bytes_read != packet_size) {
+      // Well... fuck
+      return;
+    }
+
+    pb_istream_t istream = pb_istream_from_buffer(in_buffer, bytes_read);
+    beerduino_Ping ping_msg;
+    if(!pb_decode(&istream, beerduino_Ping_fields, &ping_msg)) {
+      // Well... fuck
+      return;
+    }
+
+    beerduino_Echo echo_msg = {ping_msg.id, true, "Hello"};
+
+    uint8_t out_buffer[256];
+    pb_ostream_t ostream = pb_ostream_from_buffer(out_buffer,
+                                                  sizeof(out_buffer));
+    if (pb_encode(&ostream, beerduino_Echo_fields, &echo_msg)) {
+      Serial.write(ostream.bytes_written);
+      Serial.write(out_buffer, ostream.bytes_written);
+    }
+  }
+}
+