SP6000+ unable to complete connection
## Alarm system
Describe your panel model (ex: EVO192, Spectra SP4000, Magellan MG5050), access mode (Serial, IP150, etc..).
SP6000+, with ESP32 Serial/IP adaptor. Have tested on 1.05, 1.10 and 1.20 firmware on panel.

## Environment
HASSIO running on Proxmox, 

## Git branch
Both master and dev branches I have tried.

## Describe the bug
Unable to connect to SP6000+ board with PAI. Serial connection is established, panel replies with 


## To Reproduce
Steps to reproduce the behavior:
Start PAI with ESP32 serial/IP interface.
Have tried with & without logic level shifter.

## Logs
```
2022-12-16 21:56:28,240 - INFO     - MainThread - PAI - Starting Paradox Alarm Interface 3.2.0-dev
2022-12-16 21:56:28,240 - INFO     - MainThread - PAI - Config loaded from /data/options.json
2022-12-16 21:56:28,240 - INFO     - MainThread - PAI - Console Log level set to 1
2022-12-16 21:56:28,243 - DEBUG    - MainThread - PAI.paradox.interfaces.interface_manager - Registering IPInterface
2022-12-16 21:56:28,243 - INFO     - MainThread - PAI.paradox.interfaces.ip_interface.interface - Starting IPInterface Interface
2022-12-16 21:56:28,243 - INFO     - MainThread - PAI - Starting...
2022-12-16 21:56:28,243 - INFO     - MainThread - PAI.paradox.paradox - Connecting to interface
2022-12-16 21:56:28,243 - INFO     - MainThread - PAI.paradox.paradox - Using IP Connection
2022-12-16 21:56:28,373 - INFO     - MainThread - PAI.paradox.connections.ip.connection - Connecting. Try 1/3
2022-12-16 21:56:28,374 - INFO     - MainThread - PAI.paradox.interfaces.ip_interface.interface - IP Interface: serving on ('0.0.0.0', 10000)
2022-12-16 21:56:28,374 - INFO     - MainThread - PAI.paradox.interfaces.ip_interface.interface - IP Interface started
2022-12-16 21:56:28,466 - INFO     - MainThread - PAI.paradox.connections.connection - Connection established
2022-12-16 21:56:28,466 - INFO     - MainThread - PAI.paradox.paradox - Connecting to Panel
2022-12-16 21:56:28,879 - DEBUG    - MainThread - PAI.paradox.lib.encodings - Loaded paradox_en encoding
2022-12-16 21:56:28,880 - INFO     - MainThread - PAI.paradox.paradox - Panel Identified SP600+  version 1.20 build 0
2022-12-16 21:56:28,880 - INFO     - MainThread - PAI.paradox.paradox - Initiating panel connection
2022-12-16 21:56:29,882 - DEBUG    - MainThread - PAI.paradox.paradox - Request retry (attempt 2/5)
2022-12-16 21:56:30,883 - DEBUG    - MainThread - PAI.paradox.paradox - Request retry (attempt 3/5)
2022-12-16 21:56:31,885 - DEBUG    - MainThread - PAI.paradox.paradox - Request retry (attempt 4/5)
2022-12-16 21:56:32,887 - DEBUG    - MainThread - PAI.paradox.paradox - Request retry (attempt 5/5)
2022-12-16 21:56:33,889 - ERROR    - MainThread - PAI.paradox.paradox - Timeout while connecting to panel. Is an other connection active?
2022-12-16 21:56:33,889 - ERROR    - MainThread - PAI - Unable to connect to alarm
```
Snippet from associated UART debug output:
```
[22:00:42][D][uart_debug:114]: >>> 72 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 72
[22:00:43][D][uart_debug:114]: <<< 72 FF 04 03 10 00 A4 C6 01 01 20 00 29 20 43 CE 00 32 01 10 06 00 00 00 00 E4 FF 57 53 50 36 30 30 2B 00 07 5C
[22:00:43][D][uart_debug:114]: >>> 5F 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 81
[22:00:44][D][uart_debug:114]: >>> 5F 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 81
[22:00:45][D][uart_debug:114]: >>> 5F 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 81
[22:00:46][D][uart_debug:114]: >>> 5F 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 81
[22:00:48][D][uart_debug:114]: >>> 5F 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 81
```

[logfile.txt](https://github.com/ParadoxAlarmInterface/pai/files/10244216/logfile.txt)
[config.txt](https://github.com/ParadoxAlarmInterface/pai/files/10244282/config.txt)
