An error tolerant serial UART to TCP connection, raw data bridge.

PC side service written in Go that listens on COM ports for serial clients.
This is meant to bridge the gap between tcp connections and serial devices using UART/RS-232/Virtual COM over USB, etc.
Clients implementing the protocol have a tcp like api that they can use to make connections to real servers.
The goal of the project is to have the means to connect the simplest and cheapest devices to the internet, albeit indirectly.
For now, I use this to connect microcontrollers on development boards to servers running on localhost through the Virtual COM port over USB, without requiring any Ethernet/Wi-Fi hardware.

An implementation of the Protocol Gateway and Client, written in Go, is included here. See STM32SerialToTCPBridgeClient for an example of another Client, written in c, that connects to a MQTT broker from a STM32 Nucleo F334R8 development board (ARM Cortex-M4).

• Open a terminal, then run go get -u github.com/RoanBrand/SerialToTCPBridgeProtocol
• Run the binary in $GOPATH/bin

• The protocol provides the app an in order, duplicates free and error checked byte stream by adding a CRC32 and simple retry mechanism. See this for background.
• The Protocol Gateway opens a real TCP connection to a set destination on behalf of the Protocol Client.
• The Protocol Client connects to the Protocol Gateway over serial-like connection.
• The Client specifies the destination IPv4 address and port.
• The Gateway forwards traffic bi-directionally, as long as tcp connection is open and serial line is good.

• Open a terminal, then run go get -u github.com/RoanBrand/goBuffers
• In the terminal, change directory to the protocol folder inside the repository
• Run go test -v in the terminal

• Add config. Turn into OS service.
• Add ping option to periodically test serial line and drop upstream connection if timeout.
• Multiple connections per client to servers.
• Capability to scan system and listen on all found COM ports for clients.
• Create a Arduino lib/client that extends the Arduino Client class so that libraries for existing Ethernet/Wi-Fi shields can theoretically work.