It is just the chipset changes based on supply.
Here is an example - the HFW3549T1-AS-PV is available in 2 versions of firmware across 3 different chipsets for the same model camera:
- HFW3549T1-AS-PV-S4 uses the HX3XXX-Taurus firmware.
- HFW3549T1-AS-PV and IPC-HFW3549T1-AS-PV-S3 use the HX5XXX-Volt firmware
In this instance, Dahua added an S# designation after the model number (while Hikvision adds a C), but many do not and then you try to update with a firmware not compatible with your chipset and potentially brick it.
And since your location says "at home", who knows where you are or where you bought it from.
Many units being sold are Chinese hacked units into English that will either brick or go into Chinese upon updating. Some vendors will be upfront and tell consumers that as part of their website, but many do not or the consumer forgets...here is one such example....
You really need to be asking yourself why are you updating? If it is just for grins and giggles or OCD behavior to be running the latest firmware, think twice.
A common theme around here is don't fix what ain't broke. If the unit is working and meets your needs, in many instances an update breaks what you had working and provides you with something you didn't need or bricks the camera. In most instances, updates are simply security vulnerability patches (usually years after the breach was found), but since we do not give our cameras internet access (which your NVR is blocking), the update is useless to us.
Here is one of many
threads of someone updating for OCD behavior simply to get all cams on same firmware and bricked them. Here is one of many
threads where someone had their camera go into Chinese when they tried to update it.
Unless the release notes specifically mention it fixing a problem you are experiencing, more than likely it won't fix an issue and may make the camera worse by removing functionality or worse brick it.
yeah....