Several discount codes for m5stack.com are available. The code "M5STACK5" is one option. Another source suggests the code "m5stack956". Additionally, the codes "SARAWILLIAMS5" and "new5" are also mentioned. Please note that the effectiveness of these codes may vary and it's recommended to try different ones to see which provides the best discount. Remember to check the validity of these codes as they may have expiration dates.