Firmware is a code or software on the device that allows and enables the device to perform various tasks. The most common architectures for IoT devices are ARM and MIPS. Firmware provides the necessary instructions on how to communicate with hardware. Firmware is held in non-volatile memory devices such as ROM, EPROM, EEPROM, and code running on embedded devices. Updates to Firmware: Firmware updates are often pushed to fix bugs, roll out new features, or improve security.