That said, it appears from trying that 20 mA is not enough to even connect to a USB thumb drive. Question 1 was meant in general, is the output current limit hardware or software enforced?Ī coworker has a thermal camera attachment, which I am assuming would the same power requirements as what I am trying to use. Is there a software / hardware limitation with iOS? That seems a bit extreme when all other configurations can be tethered. However, not sure if this is true.ĥ) The only camera systems that I have been able to find like this that are compatible with iOS are wireless based. Which is it?ģ) Is there an app to allow for streaming of a USB camera to the display? Could one be made?Ĥ) For a USB device to work with iOS, does it require anything hardware wise? I have read somewhere that Apple devices requier an identification chip (forget proper term) to allow them to communicate with the device. Is this limit hardware or software set? If software, I am assuming it can be overridden.(?)Ģ) I have read some places that iOS does not support OTG, while other places say it does. For testing this works, but going forward this presents a problem, which leads to the following questions.ġ) I found somewhere that the current limit in iOS devices was changed from 100 mA to 20 mA.

The hub connects to the iOS device(s) by a USB->lightning adapter made by Apple. To combat problem 1, I have purchased a powered USB hub. Later, there may be a desire to either record the video or at least capture frames as images. I need to stream the video from the camera to the screen. The problems thus far are two fold:ġ) When the camera is plugged in, iOS recognizes it, but states it is not supported and draws too much power.Ģ) I have been unable to find an app for communicating with a USB camera, in the way I want. I have coworkers that have iPads and iPhones, but they have had hte same problem in trying to get this to work. The iOS device I have for testing is an iPod Touch running iOS 9.3. I have tried iOS and have hit what is a brick wall. For Windows, I used National Instruments Vision software to talk to it (overkill, really, but it was already installed). For Mac / Windows, the cameras come with software, but for Mac, I believe Photobooth works for talking to the cameras.

On Android, the cameras use the on-the-go (OTG) protocol to handle the communications, and there was an app that I needed to install (Basic USB Camera works for what I need, at least for testing). These cameras are readily available from Amazon and the like, and are interpreted as webcams by Android / Mac / Windows. I am working on a project where we would like to use a USB endoscope with Android / Mac / Windows and iOS.

Fantronics usb endoscope camera