gistfile1.txt

void process_data (char * data) {
  Serial.println("data");
  Serial.println(data);
//  old code for x,y:rrr,ggg,bbb
//  char *end_str;
//  char *token = strtok_r(data, "&", &end_str);
//  while (token != NULL) {
//      char *end_token;
//      char *token2 = strtok_r(token, ",", &end_token);
//      byte commands[5];
//      byte command_i = 0;
//      while (token2 != NULL) {
//          commands[command_i] = atoi(token2);
//          command_i++;
//          token2 = strtok_r(NULL, ",", &end_token);
//      }
//      setPixel(commands[0], commands[1], commands[2], commands[3], commands[4]);
//      token = strtok_r(NULL, "&", &end_str);
//  }
//  FastLED.show();

  // format: x:bbb&bbb&bbb&...
  char *state;
  // row:num&num&num
  char *row = strtok_r(data, ":", &state);
  char *brightness;
  while (row != NULL) {
      brightness = strtok_r(NULL, "&", &state);
      byte brightnesses[COLS];
      byte brightness_i = 0;
      while (brightness != NULL) {
          brightnesses[brightness_i] = atoi(brightness);
          brightnesses++;
          brightness = strtok_r(NULL, "&", &state);
      }
      setPixels(atoi(row), brightnesses);
      row = strtok_r(NULL, ":", &state);
  }
}