In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/bin/a1210_iconf.sh line 18:

  if [ "$linked" == "linked" ]; then

                 ^-- SC3014 (warning): In POSIX sh, == in place of = is undefined.

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/bin/a1210_iconf.sh line 26:

trattcom -p RELAY_ICONF_0 -v $iconf0

                             ^-----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

trattcom -p RELAY_ICONF_0 -v "$iconf0"

In /logs/firmware/patool_extraction/rootfs.img_unblob_extracted/rootfs.img_extract/0-50593792.squashfs_v4_le_extract/usr/bin/a1210_iconf.sh line 27:

trattcom -p RELAY_ICONF_1 -v $iconf1

                             ^-----^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

trattcom -p RELAY_ICONF_1 -v "$iconf1"

For more information:

  https://www.shellcheck.net/wiki/SC3014 -- In POSIX sh, == in place of = is ...

  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...