EVOHD+ & IP150+ serial connection problem

[W00D00]

Dear Community,

Please help me get my PAI serial connection working.

The problem started when my IP150 module failed and I had to replace it. Unfortunately, I could not purchase a replacement IP150 module, so I bought a newer IP150+ (v6.15.008) instead.

The new IP150+ and the Swarn Android app work perfectly. However, as far as I know, IP150+ firmware version 6.15.008 no longer supports local IP connections. That is why I would like to establish a serial connection alongside the IP150+, so that Swarn can continue to use the IP150+ while Home Assistant can connect through PAI via the serial interface.

My Paradox EVOHD+ works perfectly with my PC and BabyWare. The connection and communication are successfully established using the same settings that I am trying to use in PAI. I used the same Paradox 307USB cable for both BabyWare and Home Assistant.
This setup can work in parallel with the IP150+ because the EVOHD+ has two serial connectors.

I know all the required details, including the panel ID, IP password, admin password, etc.

Any help would be greatly appreciated.

Paradox EVOHD+:
• version: v1.8.1

IP150+:
• version v6.15.008

Home Assistant:
• Installation method: Home Assistant OS
• Core: 2026.7.2
• Supervisor: 2026.07.3
• Operating System: 18.1
• Frontend: 20260624.5
• USB3 port on a MiniPC

PAI:
• version: 3.7.0

My PAI configuration:

LOGGING_LEVEL_CONSOLE: 20
LOGGING_LEVEL_FILE: 40
CONNECTION_TYPE: Serial
SERIAL_PORT: /dev/ttyUSB0
SERIAL_BAUD: 115200
IP_CONNECTION_HOST: 192.168.8.3
IP_CONNECTION_PORT: 10000
IP_CONNECTION_PASSWORD: "…."
KEEP_ALIVE_INTERVAL: 9
IO_TIMEOUT: 0.5
LIMITS:
zone: auto
user: 1-10
door: ""
pgm: 1-5
partition: auto
module: ""
repeater: ""
keypad: ""
key-switch: ""
SYNC_TIME: true
SYNC_TIME_MIN_DRIFT: 120
PASSWORD: "…."
MQTT_ENABLE: true
MQTT_HOST: core-mosquitto
MQTT_PORT: 1883
MQTT_KEEPALIVE: 60
MQTT_USERNAME: pai
MQTT_PASSWORD: "….."
MQTT_HOMEASSISTANT_AUTODISCOVERY_ENABLE: true
MQTT_BASE_TOPIC: paradox
COMMAND_ALIAS:
arm: partition all arm
disarm: partition all disarm
MQTT_COMMAND_ALIAS:
armed_home: arm_stay
armed_night: arm_sleep
armed_away: arm
disarmed: disarm
HOMEASSISTANT_NOTIFICATIONS_EVENT_FILTERS:

• live,alarm,-restore
• live,trouble,-clock
• live,tamper
  HOMEASSISTANT_PUBLISH_PARTITION_PROPERTIES:
• target_state
• current_state
  HOMEASSISTANT_PUBLISH_ZONE_PROPERTIES:
• open
• tamper
  PUSHBULLET_CONTACTS: []
  PUSHBULLET_EVENT_FILTERS:
• live,alarm,-restore
• live,trouble,-clock
• live,tamper
  PUSHOVER_EVENT_FILTERS:
• live,alarm,-restore
• live,trouble,-clock
• live,tamper
  PUSHOVER_BROADCAST_KEYS: []
  SIGNAL_CONTACTS: []
  SIGNAL_EVENT_FILTERS:
• live,alarm,-restore
• live,trouble,-clock
• live,tamper
  GSM_CONTACTS: []
  GSM_EVENT_FILTERS:
• live,alarm,-restore
• live,trouble,-clock
• live,tamper
  IP_INTERFACE_ENABLE: false
  IP_INTERFACE_PASSWORD: ….
  DUMMY_EVENT_FILTERS: []

[yozik04]

Go serial then. Probably you need to unlock it. Ensure you know Baud rate and installer password.

[W00D00]

Thanks for your quick response. Could you please clarify what you mean by "unlock it"? What exactly do I need to unlock?
You also mentioned the "installer password". Do you mean the installer password for the EVOHD+?

[yozik04]

PAI requires installer password to communicate. Use search for information regarding unlock. I did not do that myself but here are threads that mention it. You need to do your own research for that and if you need it at all.