10

Trigonometry ! My camera is a DLink 5020-L and has pan/tilt commands which can be given through an API. It also has predefined positions to set and can also be triggered through API Pre-init Define a position of your camera to a 0° Pan and a 0° Tilt in your referential => we will call this position Position 1 Init Move your camera to Position 1 Store ...


7

I am not certain that this is an IoT question. I have the impression that those tracking devices would not get any GPS signal in shipping containers, trucks or buildings, where they would be most of the time. Also, I see the same issue regarding the connection to a cellular network or alike, especially in regions with bad network coverage. I have developed ...


6

Great answers already, I'd just like to add a few other things that you should take into consideration. Like hardlib and Goufalite have already mentioned, the way to do this is trigonometrically. I've drawn out a 2-d depiction of the camera and the IoT object: As you can see, the camera's field of view is going to be larger than the object - if not in ...


5

This is normally done with basic trigonometry. Start by working on a single 2d flat plane with the camera at the origin (0,0) and the object at (x,y) Given that the x distance will be the adjacent side of the triangle and the y distance will be the opposite you get: so the pan angle can be found with You can also work out the straight line distance (the ...


5

There's another idea, also from trackr's support page. Again, it's also a feature that can be enabled/disabled, and that is "Device alert." Basically, it warns when your phone can no longer make a bluetooth connection with your TrackR devices. If your TrackR device and/or smart phone is sounding off at seemingly random times, you may have device ...


3

I have used EPC GEN2 [EPC865-868 MHz(Europe), 902-928 MHz(USA)] technology for an automated document management system. You can find long distance antennas on the market. For example - GAO RFID can be good choice. Tags supported by such a system can be found everywhere, including Alibaba.com and Amazon.com. Tags can be active or passive so you can choose ...


3

If this only happens when the phone and the trackr's are separated, according to trackr's support page, This separation alert is an intended functionality. If you would like to disable this feature please check device settings to make sure that both iPhone Separation Alert and Device Separation Alert have the toggle set to the 'off' position (To change ...


2

Your best choice might be to have a look around on this site, quite a lot custom made hardware can be found here. A partially appropriate one could be this Tiny ESP32 board that is 29.21x26.72 mm, BT and WiFi capable programmable MCU with temperature, humidity and pressure on the board. You can add a gyro and an accelerometer separately or you can use it ...


2

I almost wonder if this is a duplicate of this question that @Aurora0001 linked. I would suggest the LightBug again. It has got an 8 day battery life, plus solar recharging, if you can leave it attached on the outside of your purse. It's quite small (53 x 27 x 15mm), transmits to the LightBug servers every 15 minutes. It works indoors, and can even make ...


2

You'd track on several levels. You track the truck with GPS, not the products. You track the individual shipments with zigbee or RFID. Those technologies are a lot cheaper. Thus, it's affordable to put them in or on less expensive products. Between commercial end points both sides can verify each product by the WPAN technologies on arrival or on packaging ...


1

Assuming the van as an ODB-2 port (most do) then you can just grab something like this. This assumes that you need something that reports in real-time, since you'd have to pay for a data plan. That one has an app so there must be some kind of api that it is reporting to; that system may have an open api you could leverage. Even if it doesn't, this one also ...


1

Firstly, how are you going to power your device? If you have a modern radio, or even a cigarette lighter USB adapter, then you can easily power an EDSP32, Raspberry Pi Zero W, BBC:Microbit, Arduino, etc. All of those could get the job done – with, in some cases, additionally Hat/Shields, so choose one that you are familiar with. I need to determine when a ...


1

I am trying to develop a security gadget which can be wearable. Congratulations. This sounds like a good idea. The first thing to worry about is power. Wait! Actually, that is the second. The fist is whether you want to create a new device, or whether it might not be better/easier to develop an app for a smartphone. But can be operate remotely from any ...


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