Abstract: A system is provided, including: an aerosol-generating device and/or a charging device associated with an aerosol-generating device; a near-field communication module including a nonvolatile memory; and a controller configured to receive an indication of an error occurrence and to update an error data log stored in the nonvolatile memory by storing an error data entry associated with the error occurrence to the error data log, the error data entry being configured to be read by an external device even when the aerosol-generating device and/or the charging device including the near-field communication module is not powered. A method for maintaining error data on an aerosol-generating device and/or a charging device associated with an aerosol-generating device is also provided. A method for recovery of error data from an aerosol-generating device and/or a charging device associated with an aerosol-generating device is also provided.

Abstract: Aerosol-generating apparatus (100) for self-diagnosis allow users to initiate the self-diagnostics and then provide a diagnostic indication using, for example, indicators (162). The aerosol-generating apparatus (100) may include an aerosol-generating device (102) and a host device (101). The host device (101) may include one or more user-selectable switches (152) to initiate a self-diagnostic procedure and one or more indicators (162) to depict or display the diagnostic indication.