public static boolean isValidTtl(final int ttl) {
        return ttl >= MIN_TTL && ttl <= MAX_TTL;
    }
Checks if the Publication ttl value is within the allowed range where the range is 0x00 - 0x7F.

@param ttl ttl
@return true if valid and false otherwise
mesh/src/main/java/no/nordicsemi/android/mesh/utils/MeshParserUtils.java