AT+BLESCAN name filter fails if the name has a null character in it

[JHedgesBartec]

Answers checklist

• I have read the documentation ESP-AT Programming Guide and the issue is not addressed there.
• I have used the latest released firmware or have updated my ESP-AT branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

AT+GMR

Official release firmware: v3.4.0.0 (https://docs.espressif.com/projects/esp-at/en/latest/esp32/AT_Binary_Lists/esp_at_binaries.html)

ESP-AT Firmware Source

Official Release firmware.

Hardware Information

ESP32 WROOM

Power Supply used

USB

What is the expected behavior?

When providing a name to filter scan results for, the comparison should be done based on string length of the advertised name.

What is the actual behavior?

If the broadcast name in the scan response data contains '00' (trailling null as part of a string) the name filter is failing.
For example:
+BLESCAN:"f8:8a:5e:0d:14:c0",-36,,0302221108094553502D415400,0,0

Where the name field is 08094553502D415400 which is "ESP-AT" followed by a null. If the AT+BLESCAN command is provided "ESP-AT" no scan results are returned.

Whist having the null in the name may not be considered valid, some third party devices include it, so the ESP-AT framework should account for this.

Probability of recurrence

100%

AT+SYSRAM?

AT+SYSRAM?
+SYSRAM:118296,115376
OK

Steps to reproduce

Configure a server to broadcast the following data in the name 4553502D415400 ("ESP-AT" followed by NULL)
Start a scan using "ESP-AT" as the name filter
No scan data is returned

AT command port output

AT+BLESCAN=1,30,2,"ESP-AT"

OK
+BLESCANDONE

AT log port output

Built with silence mode enabled.

More Information.

No response