Endianness breaks communication when one system sends multi-byte data in one byte order and another system reads the same bytes using a different byte order. For example, one device may send: 12 34 meaning: 0x1234 But another device may interpret those same bytes as: 0x3412 The bytes are identical. The interpretation is different. This can cause wrong sensor readings, invalid commands, communication failures, and difficult embedded system firmware bugs. The Main Problem: Same Bytes, Different Meaning Imagine two embedded devices. Device A → Communication Data → Device B Device A sends: 12 34 Now Device B must know exactly what those bytes mean. Are they: 0x1234 or: 0x3412 The answer depends on the communication protocol. If the protocol is not followed correctly, Device B may calculate the wrong value. That is how endianness can break communication. A Simple Example Suppose Device A wants to send the number: 0x1234 If the communication format uses big-end...
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