Unified communication for IoT clients

The backends interface was introduced to support different connection methods. Each backend should provide the way to establish bidirectional connection for exchanging binary data with devices.

IMPORTANT NOTE: Async runtime feature should be selected explicitly.

Supported features

• futures Use futures only
• tokio Use tokio runtime
• async-std Use async-std runtime

Built-in backends

• unicom-tcp TCP socket connection
• unicom-unix Unix-domain socket connection
• unicom-serial Serial port connection