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Go to Azure IoT Suite and click on 1RMB Trail.
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Enter you phone number and complete the verification process.
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Enter basic information and complete the real name authentication.
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Register
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Pay 1 RMB to complete the register
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Go to Azure IoT Portal.
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Click on "All services", and choose "IoT Hub".
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Create a new IoT hub.
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Name your new hub.
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Obtain your connection string as instructed in the figure below: