1 answer
Utoolity's (commercial) Tasks for AWS add-on offers dedicated tasks for several Amazon Web Services (AWS) products, see available tasks for details. AWS Device Farm is not on our near-term roadmap yet, though given its fairly unique value proposition, we are looking into it already - please watch/vote/comment on UAA-94 to stay in the loop and help us prioritize this story.
Workaround
Tasks for AWS includes Identity Federation for AWS and its AWS Credentials Variables task to ease using the AWS Command Line Interface (AWS CLI) in turn, which allows you to manage [almost all current and future] AWS services.
The AWS CLI devicefarm reference lists all available commands, which you could facilitate as conceptually outlined in How to work around limitations with the AWS Command Line Interface (AWS CLI). For the use case at hand, you probably require create-upload, followed by schedule-run.
Please note that the chosen upload mechanism is a bit unusual, as outlined in the AWS team's response to How to upload files using aws sdk?:
[...] When you call CreateUpload, the response is a JSON object representing the created upload. This returned Upload object contains a url field, which is an S3 pre-signed PUT URL. To actually upload the file, you must make a PUT request to that URL. [...]
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