I’m not good with electronics … just IT 
- I connected the three existing ir sensors to the three zones on the board
- I connected the red/black power cables of the pir sensors to the boards +/- connectors
- I connected a laptop to the board via a micro usb cable and installed the usb driver
- I flashed the esphome firmware (using microsoft edge) onto the board using the install.konnected.io - (board powered up from usb but firmware flashing did not work until i plugged in the power brick as well)
- Installed home assistant on a raspberry pi with the esphome addon (after wifi secret already added to esphome addon)
- Home assistant found the board and i adopted it in homeasistant
- Installed the alarmo addon into home assistant and got a burgular alarm system up and running with some simple configuration of the alarmo
- Installed the home asistant app on all users with easy big arm home and arm away buttons (alarmo sets these up for you)
- Installed zerotier on phones and home assistant so everyone can access the dashboard from whenever
Happy bunny! repalced faulty system for less than £150 cost
My negatives…
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I think it should be made clear to newbies that your bell/alarm will simply not work without a driver module, and really should be supplied with the unit … which is a significant cost when added to the panel itself (only £93 here in the uk).
I will just end up using a cheap smart plug connected to a 12v adaptor hooked up to some cheap bells with home assistant firing them up during an alarm (easy to setup within alarmo addon) -
I think it should be possible to have the option of being able to use the 12v power in the old alarm panels to power the device instead of a bulky power plug, pain having to put in a new power plug near the panel
anything i could do better please?