   // Number of bytes received from USB.
   uint32_t bytes_read = 0;
   
-  // Signed char pointer to head of buffer.
-  char *input_buffer_ptr = (char *)input_buffer;
-  
   // Result of JSON parsing.
   jsmnerr_t json_result;
 

    return;
  }
  
  // TODO: read these inputs and do things.
  
  // Send back response.
  //adk.write(bytes_read, input_buffer);

  Serial.println(output_buffer);
}

/**
 * Copies a JSON string token into a provided char* buffer.
 */
jsmnerr_t json_string(const jsmntok_t &token, const char *json_str, char *output_str, size_t output_len)
{
  if (token.type != JSMN_STRING) return JSMN_ERROR_INVAL;
  
  size_t len = min(token.end - token.start, output_len - 1);
  strncpy(output_str, &json_str[token.start], len);
  output_str[len] = '\0';
  
  return JSMN_SUCCESS;
}

/**
 * Extracts a floating point value from a JSON token.
 */
jsmnerr_t json_float(const jsmntok_t &token, const char *json_str, float &output_float)
{
  if (token.type != JSMN_PRIMITIVE) return JSMN_ERROR_INVAL;
  
  const size_t len = token.end - token.start;
  char float_buffer[len];
  strncpy(float_buffer, &json_str[token.start], len);
  float_buffer[len] = '\0';
  
  output_float = atof(float_buffer);
  return JSMN_SUCCESS;
}

void setup() 
{
  // Initialize debugging serial console.
