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It would not working with at least half of phones and tablets, because it needs kernel compiled with usb2ttl adapter's support or you should have kernel sources to compile kernel module by youself. It's not very complicated, but it's hard to find kernel sources. Most companies doesn't share it. You are lucky if you has popular phone from samsung for example or sony.At the other side there are a lot of arduino clones. Most of them has ftdi controller for usb2ttl support, but I seen few with cp2101. So, you should also know what kernel module you need. If you can just plug arduino to the phone and ttl is working, other steps is obliviously and you are lucky.
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