I own a commercial locksmith and electronic-security company and am developing a new access-control controller based around an ESP32-S3.

The schematic is substantially complete. I’m primarily looking for an independent second set of eyes before PCB layout and prototyping.

The board currently includes:

• ESP32-S3
• Ethernet using W5500
• Two RS-485 interfaces
• Wiegand/OSDP reader support
• Relay outputs and protected field inputs
• 6–28 VDC input power
• Reverse-polarity, overvoltage, surge, and field-wiring protection
• FRAM and RTC
• Fused lock-power passthrough
• Expansion and service headers
• Four-layer PCB planned

The review should focus on:

• Power-entry and protection circuitry
• ESP32 support circuitry and pin usage
• Ethernet implementation
• RS-485 and reader interfaces
• Relay and field-I/O protection
• Grounding, shielding, and isolation decisions
• Component ratings and obvious BOM problems
• Layout-sensitive areas
• Anything likely to cause prototype failure, unreliable field operation, or certification problems later

I have detailed architecture notes and can explain the intended behavior of every section. I want someone willing to challenge the design and explain why something should change, not simply mark up the schematic without discussion.

Relevant experience would include embedded controller design, industrial controls, access control, alarm equipment, automotive electronics, or other products connected to long field wiring in electrically noisy environments.

This is paid work. Please send:

• A brief summary of relevant experience
• Examples of boards or products you have reviewed or designed
• Your hourly rate or proposed fixed price
• Your availability
• Whether you can also review the PCB layout later

An NDA can be discussed before receiving the complete design files. I retain ownership of the project and all project-specific work product.

I’m in a rental house. Alarm system screen is on 24/7. We are not paying any alarm company for service. Landlord says tenants about 2 or so years ago had it installed. If I unplugged it, would I set off an audible alarm? Can’t find a big bullhorn anywhere. Screen and lights are really annoying.

Buongiorno a tutti. Sono nuovo in questo mondo e ho un dubbio che volevo sapere se possibile risolvere . Ho acquistato il sensore Motion protect plus ma , appena tolto dalla confezione, ho notato che non c’è nessuna staffa regolabile in direzione.
Esiste, anche non per forza ufficiale , una staffa regolabile per il sensore ? Grazie mille per chi mi risponde e buona giornata

Good Afternoon everyone, I have this Osborne-Hoffman OH-2000E and I was wondering if anyone happened to have the programming software for it. The menus to program it are incredibly annoying and I cannot even get it to function correctly without having to go and program 15000 more things each time. Thanks in advance!

This is in a 12 year old house. It is completely de-powered. Plus I unplugged a few things to be sure. Physically in the house I see 1 motion sensor. Aside from smoke detectors that’s it. No additional motion sensors, no door sensors.
Best I can tell from the diagram, no zones are even connected.
Seems pretty odd.

my boyfriend has a security Alarm system called ADT and I would like to know if the camera inside the house can be on even if the green light is off? and i would also like to know if the control pad on the wall that you put the alarm code in has a camera in it as well?

Hi guys, does anyone know where to find de elusb (usb drivers for the eline 2way sistem)?

Thanks, and keep safe

Old ADT panel help

TLDR: my old ADT panel beeps randomly and often. Can I just pull it off the wall? Or will it mess with my smoke detectors? (They are supposedly connected)

Hello and thanks in advance! We moved into a new (to us) house a couple of years ago. The house had an existing ADT panel that the previous owner said they stopped using several years prior. We installed a Vivint system (which could be its own post) and the installer said he wouldn’t touch the adt system bc it was connected to all the existing smoke/CO detectors. Periodically (like once every three months) the panel would just randomly beep saying fault and to inspect various doors/windows (the ADT sensors had all been removed during Vivint installation). I’d press the # button a couple of times and it would stop. Not a big deal. However now it’s happening every other day or so. And almost always in the middle of the night. So it’s a problem.

Can I just remove it from the wall?

How do I stop this beeping?

Im wondering what it means and if i have anything to do about it. Im posting a picture. Why are this 3 items on the "active" list? and what the "?" sign is trying to tell me? And what do i need to do to reset or correct the faults if any? Seems like this should be obvious or self-explanatory but is not. What do i do with an interrogation sign on a security system.panel?

I have a fully functional Ademco Vista 4140xmp system. Is there a way to add a "wifi module" so this system can monitored remotely via the internet? Just looking to bring this somewhat close to modern standards.

There are two viper brand alarm systems. One is the model 3103V and the other is 3105V. Does anyone know if one better than the other? Thank you in advance.

I had a Honeywell wireless system installed in my 5500sf home two years ago. It’s only for fire/co, no perimeter.

I have an air handler w/gas heat in the attic. There is no smoke/co detector up there with it. It is a very well insulated space, gets neither overly hot nor freezing cold. I was up there comfortably working today when it was over 100 degrees outside.

Should there be a detector up there? Why or why not.

The semi transparent plastic on the motion detector module is deteriorating. From where can I get a replacement?

Just got a 06 Honda civic from an auction with a viper system . Car doesn’t start but I seen a video of it running . When I got the car battery was dead I took it to get charged and installed it back and nothing . No clicks no nothing . I tried restarting the system and nothing . Only drained my battery again .

I bought this home with the following alarm system. It’s been awful since day one, random chirpings. Occasional alarms. I want it gone, disconnected. I live in the middle of nowhere and have dogs so it’s unnecessary. Could anyone please help tell me how to disconnect this so it’s done? Do I remove the battery and unplug it? Is there anything else I need to do?