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LTE-A Module Series

EP06&EG06&EM06 DFOTA User Guide

EP06&EG06&EM06_DFOTA_User_Guide 13 / 16

4 Abnormalities and Important Note

4.1. Abnormalities

4.1.1. Wrong Delta Firmware Package

After executing AT+QFOTADL command and the delta firmware package is downloaded, the module will

reboot automatically and then enter into recovery mode. The module checks the upgrade package first, if

there is something wrong with the package, the URC (+QIND: "FOTA","END",<err>) of an error code (504,

505 or 510) will be reported, then the module will reboot automatically, enter into recovery mode and

re-check the package for maximally five times. If the package is still wrong after five retries, the module

will reboot and enter into normal mode. In such case, please confirm the delta firmware package and

re-put it on FTP/HTTP(S) server.

4.1.2. Failure of Firmware Upgrade

After the upgrade package is checked OK, then it starts to upgrade firmware. If it is failed to upgrade the

firmware, the URC (+QIND: "FOTA","END",<err>) of an error code (502, 511, 520-530 or 540-546) will be

reported, then the module will reboot automatically, enter into recovery mode and retry to upgrade for

maximally five times. If upgrade is still unsuccessful after five retries, the module will stop firmware

upgrade and restore to the original version.

During an upgrading process, once the delta firmware package is downloaded, the module can only retry

for maximally five times in total, among which retry times for package checking and firmware upgrading

are both included.

As mentioned in Chapter 2, it is a completely automatic process after executing AT+QFOTADL command.

Therefore, any +QIND: "FOTA","END",<err> URCs sent from the module to the Ext. MCU can be ignored.

NOTE

Quectel EP06 User Guide

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