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    How to tell lens size on camera's?

    if the labels have been removed (really? who does that?) or if you swapped lenses and didn't mark them somehow (really!? who does that?!?) , just set them all up next to each other and compare scenes. or open them up, unscrew the lens and aim a laser pointer through it from the back side...
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    Looking for long cable advise/solutions 160ft/560ft PoE

    wire it up (+1 on quality cable!) and see what's not working (if anything) then add another ethernet switch in the middle of that run, somewhere. easy-peasy.
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    The Chinese camera does not start up

    extracting firmware from the working cam in a format that can be applied to the non-working may be a challenge. it's not something I've done, but good luck!
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    The Chinese camera does not start up

    looks about right. should be safe to swap those around if needed to get/send data, but that's the most common arrangement i've seen...
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    The Chinese camera does not start up

    typically, tx connects to the first (square pad), rx the next one and grnd to the third (no need for 5v or anything else). Fire up Putty on Windows (or equivalent serial program on IOS), most often 8N1 @115200 is proper setting, but can vary. Any signs of life there and you MAY be able to...
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    Sensors used in Dahua cams

    possibly IMX485? Products｜Image Sensor：Security｜Products｜Sony Semiconductor Solutions Group
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    Review of the Hikvision OEM model IPC-T2347G-LU 'ColorVu' IP CCTV camera.

    yes, thanx Andy. I had the new FW, just confused about how to make it work. all good now. Cheers!
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    Review of the Hikvision OEM model IPC-T2347G-LU 'ColorVu' IP CCTV camera.

    I was on older FW for this cam and couldn't figure how to enable/disable the white LED with motion, so i had BI do it. With a little packet capture of the GUI enabling/disabling the LED, I came up with a curl command to do so and added that as a command to run when the camera alerts and resets...
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    The Chinese camera does not start up

    serial pads circled in blue.
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    The Chinese camera does not start up

    i don't recognize that logo. Are ther any other identifying marks or stickers on the cam to identify the make & model? That would be your best bet to tracking down working firmware, But of course, you'd need access to it somehow to re-install working formware once you had it. Most likely...
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    Smartening up the Lorex LNB8005C 8MP mini bullet.

    all the needed info is in the first post at Dahua IPC EASY unbricking / recovery over TFTP
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    Lorex LNB8005B-C and Dahua firmware (Solved with instructions)

    FYI, same process works to upgrade LNB8111 (previously on Lorex v20). I went straight to V2.800.0000013.0.R, Build Date: 2019-12-02 via tftp.
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    Smartening up the Lorex LNB8005C 8MP mini bullet.

    The LNB8111 (on Lorex v20 fw) took the Dahua FW DH_IPC-HX5X3X-Rhea_MultiLang_PN_Stream3_V2.800.0000013.0.R.191202 directly via tftpd. Didn't need to first flash the intermediary DH_IPC-HX5X3X-Rhea_EngSpnFrn_N_Stream3_V2.460.0000000.16.R.20170904.bin before going to v2.800. I re-upgraded to the...
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    Changing/Switching PoE Camera Lenses

    that amcrest lists IMX274 sensor: https://www.sony-semicon.co.jp/products/common/pdf/IMX274LQC_Flyer.pdf not great. if you really need 8MP, stick with a bigger 1/1.8" sensor, or you'll have crap at night. plus that amcrest uses a 2.8mm lens, so while it would be OK for a daytime overview...
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    Smartening up the Lorex LNB8005C 8MP mini bullet.

    for posterity, 'printenv' and 'help' commands before the update:
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    Smartening up the Lorex LNB8005C 8MP mini bullet.

    @Tsu Ko, I just got a used LNB8111 to play with. mine does report HWID IPC-HFW4830EP-S in the magicbox URL: http://192.168.0.170/cgi-bin/magicBox.cgi?action=getSystemInfo appAutoStart=true deviceType=LNB8111 hardwareVersion=1.00 processor=S3LM serialNumber=ND051812000996...
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    New 1080p IMX482 sony sensor

    looks like a quad-bayer (2x2 binned) version of the imx485. same size sensor, but 2mp vs 8mp and each pixel is a whopping 5.9um (vs 2.9) a few offerings of the imx485 on aliexpress in industrial format, but no cctv-type ip cams (yet...)
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    LKB384X 4K Active Deterrence Camera without the NVR

    i'd agree. 2MP/5MP/8M(4K) FloodLight IPC - Raysharp supposedly Onvif-compatible by default (unless Lorex disabled that). Are the cams findable in ODM (Onvif Device Manager) ?
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    Comparison of a Fixed Lens and a Varifocal Lens Camera's FOV

    exactly. my point is just that 6mm focal length on an m16 lens will have different FoV than 6mm on a d14 lens.
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    IP Cams gone from Blue Iris (and network)

    well, re-plugging at the poe switch does power cycle the cams, assumign they are alive at all. as for a 'reset' button the turrets tend to have them inside, ie, you need to open it up, find the button and hold it down for 30 sec or so while bring the power up to the unit. Since you have it...
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    Comparison of a Fixed Lens and a Varifocal Lens Camera's FOV

    once again, different lenses. https://www.dahuasecurity.com/asset/upload/uploads/cpq/DH-IPC-HDW5442TM-ASE_datasheet_20200622.pdf https://www.dahuasecurity.com/asset/upload/uploads/cpq/DH-IPC-HDW5442TP-ZE_datasheet_20200518.pdf While they use the same 1/1.8" sensor, fixed has an m16 while...
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    Comparison of a Fixed Lens and a Varifocal Lens Camera's FOV

    yes, different lens (tho both d14 mount v/f's) . same sensor. i wasn't saying 5231 to 2231 is apple-to-apples, just that 2231 to 5542 is not, and that explains the differing FoV at the same 'zoom' level... aside: one of my 2231's has a 6-22mm zoom range, thanx to a lens replacement... :)
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    Comparison of a Fixed Lens and a Varifocal Lens Camera's FOV

    2231 has same sensor as 5231, smaller than the one in the 5442... it's not apple-to-apples unless you have the same size sensors and the same lens-mount type...
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    Comparison of a Fixed Lens and a Varifocal Lens Camera's FOV

    the difference is due to the varying SENSOR sizes. the larger sensor in the 5442 results in a wider FOV for any specific lens that is not accounted for in your mm-to-zoom conversion... IE< a 5442 (1/1.8" class sensor) with 6mm lens will be wider than a 5231 (1/2.8" class sensor) with a '6mm'...
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    Dahua IPC-B5442E-Z4E For License Plate Camera

    might be easier to get a 5-60mm (12x) lens to fit into the 5442. the Z4 already has a VF lens, so it may have room for a longer one... do the 5442 Z4's use an d14 lens? or is it an m16? or maybe a CS mount? I don't have one handy...
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    IP Cams gone from Blue Iris (and network)

    EdcFish has point. make sure your Poe switch is still connected to the rest of the network. you really should see ARP's from the cams as they reboot, even if they were hacked to change password or IP. the fact you saw none makes me wonder if you have end-to-end connectivity between the cams...
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    2,8mm or 3,6mm

    keep in mind your actual FoV will depend on the sonsor AND lens combo in the cam you choose. IE, a 3.6mm lens on a 1/1.8" sensor tends to be wider than a 3.6mm lens on a 1/3" sensor... but i agree with Holbs that you probably don't want go much narrower view than the photo you provided to...
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    IP Cams gone from Blue Iris (and network)

    FLIR N133ED looks like a turret/eyeball cam to me, not bullet. assuming you've checked the poe and link lights on the switch. have you run the hikvision SADP tool? or maybe the Dahua config tool? (not sure if those are Hik or Dahua re-brand, but if alive on the network, one of those tools...
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    How To Upgrade Amcrest / Lorex to Dahua Firmware And Get All Dahua Features

    see what you get with this URL from the http api doc, .EventHandler'] http://<cam ip>/cgi-bin/configManager.cgi?action=getConfig&name=MotionDetect[0].EventHandler look for the setting for 'EventHandler.SnapshotTimes '. try the SetConfig syntax (see the SetEventHandler section of the doc) to...
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    How To Upgrade Amcrest / Lorex to Dahua Firmware And Get All Dahua Features

    for the file path, See the HTTP API spec, specifically Get & SetStorageGroupConfig. eg: http://<cam ip>/cgi-bin/configManager.cgi?action=getConfig&name=StorageGroup if you try the Set option, be sure to note the prior settings, in case you need to revert...
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