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I wasn’t able to find a good definitive source, but here is a start.
"Vadiyalu are small sun-dried fritters that can be stored for months on end and fried as and when required. Called Sandige in Karnataka, Wadi in Punjabi, and Vadagam in Tamil, every region of India has its own treasure trove of these sun-dried treats." Atukula Vadiyalu (Andhra Style Aval Vadam | Avalakki Sandige), Aruna, 2017. [1]
I gather from the context that vadiyalu is Telugu and sandige is Kannada.