What else can old cameras do? Don't throw away the obsolete 4K 1080P; taking it from the cloud can do three more things

last year, when the family surveillance cameras were replaced with 4K, the first batch of 1080P infrared cameras bought in 2021 was retired. My wife packed them in a cardboard box and said they were on Xianyu. One was 32 yuan and someone asked, and the other was left hanging for a week without a single bargain. I stopped both units—not because I was reluctant to spend those tens of yuan, but because I had rounded out the corners of my home and happened to need two camera positions that didn't mind me. To use an old camera, first think about one thing before acting.

Let me be clear: what old cameras fear most isn't their age, but that no one fixes the loopholes

I checked the backend of these two bolt cameras, and the last firmware version was in autumn 2022, and it hasn't been updated for over three years since then. Cameras are different from routers. If the router's firmware stops updating, at worst there's a risk of internet access, but what's hanging behind the camera is your living room or bedroom. When I wrote about checking security one by one six heads at home, I flipped through firmware versions and concluded the same: the biggest problem with cameras that stop updating isn't the poor image quality, but the that no one fixes the flaws.

but just throwing it away is a pity. A 1080P camera is more than enough for looking at outlines and identifying figures during the day. The hardware itself is flawless, with 5V 1A power supply, a Micro USB port, and a single cable from an old Android phone. If it breaks, it's easy to fix. The real problem is that it still foolishly uploads images to the cloud—the vendor's servers are still there, the app can connect, but it hasn't patched a single new vulnerability that has emerged in the past three years. Staying on the cloud is like moving things out of a machine with no one guarding the door safe.

my approach can be summed up in one sentence: keep the hardware, and quit the cloud. Downgrade it to a local device that only works within your home LAN, with loopholes and footage that can't get out. This approach applies to any outdated camera that has been discontinued.

Step one: take it off the clouds

Zhaiyun follows three steps, don't mess up the order:

Step one: Change the password. When I built my PC in 2021, I wanted to save it and set the default password for over three years. First, change the device password in the app to a 16-bit hybrid one. This step must be done before disconnecting from the external network; otherwise, if you disconnect, you will have to disconnect and reconfigure it.

the second step, Guan Yun. Turn off all available options in the app settings: cloud storage plan, screen upload, P2P traversal, and even those with intelligent recognition and sync. On some models, these switches are hidden deep inside; flipping through the "Advanced Settings" and "Privacy Settings" tabs can turn off everything that can be disabled. Some things can't be turned off, like cloud device bindings that can't be unlocked. Don't worry, the third step will cover the situation.

Step three: cut off the outer net. Under my router hangs an AP modified from an old router, dedicated to feeding smart devices a single 2.4G, but the external network outlet is blocked by the main router. Two old cameras were thrown into this private network, and the app couldn't view them on the foreign site. Fortunately, they hadn't planned to let them off the network beforehand. If you don't have this setup at home, you can take a quick step: find these two devices in the main router's device management and directly block internet access. You can still lock them to the local area network and how to operate them on the router. I once wrote an article about anti- anti-internet penetration, and the backend is designed for this.

After

disconnection, I had an unexpected discovery: the apps for the two cameras no longer run cloud storage promotional ads, looking much cleaner. One more reminder: these old cameras only recognize 2.4G. If you can't connect to the network, don't suspect the device is broken. First switch your phone's 5G band to the 2.4G end before configuring it. Smart devices only recognize 2.4G — I've fallen into this trap more than once.

Position One: Insert a card, watch the cat machine without the cloud

the first station, I placed it next to the TV cabinet in the living room, with the camera focused on the cat's rice bowl and litter box. The feeder at home dispenses food on schedule—what time the cat goes there, whether it's eating, how often it scoops litter—just in need of a dedicated camera to keep an eye on it. Previously, I used an old phone that was gathering dust modified its surveillance to do this job and it worked, but the phone solution had an unavoidable flaw: the battery stayed plugged in for years and got hot, and in summer it felt hot to the touch, so I had to set it up with limited charging. A proper camera doesn't have this problem; plugged in is designed to run 24× 74.

storage, I plugged in a SanDisk High Durability 64GB card for about fifty yuan. When choosing cards, don't just use outdated regular cards from your phone to make do. Surveillance writes in a round-the-clock loop, and the write lifespan of regular cards can't hold up. The high-durability and dedicated monitoring models are designed for this method. I've calculated the capacity storage: a 1080P H.265 main bitstream is about 2 megabytes, recording about 21GB continuously all day, and 64GB maxed out for three days. But when checking the camera position, you don't need to record continuously; set it to motion detection, and only record when the cat gets close. The daily valid video is only four to five gigabytes, a 64GB card can be stored for ten days or more, and when it's full, it automatically overwrites the oldest one, so you don't need to worry about at all.

watching the replay, just open the app under your home WiFi to watch the local card recordings, without going online. My husband now sits on the sofa every day, watching replays of cats eating, even more enthusiastic than watching short videos. The only shortcoming to recognize is night vision: infrared night vision is black and white, and at night, cats are like black-and-white shadows—you can recognize outlines but can't see fur color. That's a physical feature—machines from 2021 were like this.

Position 2: Feed into the NAS via RTSP, picking up a free recording all the way

second unit is placed on the entryway shoe cabinet, with the camera angled toward the main door, filling in the original six uncovered entry corners. This one didn't have a SIM card and took a different approach: the RTSP stream was fed directly into the N100 Feiniu NAS at home, and the monitoring center added it as the seventh channel. I previously wrote about the process of adding itNAS I recorded in detail when the recorder , with three key points: first bind it to a static IP on the router to prevent the DHCP from disconnecting the entire stream when the address is changed; If ONVIF can't be found, manually enter the RTSP address. Each company has different address formats, so copy the comparison from that article; If the password contains a hash number, remember to escape; I've stepped into this trap for you.

to NAS, there's a key point: the main stream is reserved for video, while the substream is reserved for preview. Sub-stream 720P is just over half a megabyte, which is enough for a quick scan on your phone and saves bandwidth. I checked the daily recording volume on this trip. Only after people passed by the entryway camera did it record, less than one GB per day, all of which ended up in the NAS monitoring directory. Mixed with the original six-channel system, it was easy to review when out and about.

someone asks if a NAS hard drive can withstand this long journey. To put it bluntly, this channel costs about one GB per day, which is just a fraction of the 4TB drive pool. If you really want to worry about space, check my post about how many days can be stored video, and lower the main stream for six channels that should be reduced. This saves a lot of money than losing an old camera. If the pool is already empty, then it's time to clear the space or add more plates, not the old camera.

Position 3: Temporary deployment work, just the right time to assign it

old cameras have a legitimate use: as temporary workers. The night before leaving for the National Day holiday, I unplugged the first TV from the cabinet and plugged it into the outlet of the shoe cabinet by the door, placing it facing the front door all night—during those days when I was out, no one was home, so having one more facing the door gave me peace of mind. When I came back, I unplugged it and moved it back—a minute back and forth. keep which devices at home are out of power before heading out. I've made a list of these temporary slots are flexible personnel randomly added outside the list.

temporary camera stands have a natural requirement: they can connect anywhere. Old cameras only recognized the "drawback" of 2.4G, which actually became an advantage here—2.4G has low wall attenuation, and even in the most corner sockets, hallways, and storage rooms, there are only two bars of signal left, it can still connect and push the substream stream. The 5G band is already dead in that area. So the corners of the home with poor signal or the places where you do heavy work are just right for the old ones.

also mention the power supply. With this type of bolt 5V 1A power supply, any old phone charger can easily pull it off, making it easy to take on business trips. Don't use those 9.9 yuan generic adapters; the main issue with unstable power supply is occasional frame drops and freezes, and you might think it's a WiFi issue, so you end up spinning in circles.

don't force yourself to keep these two types of old cameras—just take them seriously

not all old cameras are worth keeping. I helped a friend rummage through his old machine, and there were two types I immediately advised to throw away:

one is cloud-bound dead. No matter how much you dig through app settings, you won't find words like RTSP or ONVIF. Storage is only for cloud solutions with no card slots, and you won't even find them in the manufacturer's app store. This kind of machine is blind without the vendor cloud; there's no local ability at all. Some older models have third-party firmware online that can be flashed entirely locally. You can find them on forums like Enshan, but flashing risks turning them into bricks and you have to adjust your environment yourself. If you really like tinkering, go for it. Ordinary people shouldn't try it—if you mess up, you won't even have the cloud you could see.

Another type is night vision and image quality that are unusable. Machines with weak infrared lights turn the screen black at night. Older cameras under 2 million compared to 1080P are hard to recognize during the day, and these are just taking up power outlets.

the finishing order: first change the device password, then disable cloud uploading, disconnect from the external network and enter the local area network, then assign positions based on whether there is a lag slot and RTSP, and finally run one night and replay the next day to confirm it is really recording before finishing. Together, I spent the price of an SD card, replaced two new camera slots, and had a temporary worker on call. This deal is more cost-effective than selling second-hand for 32 yuan.