update readme

Author: RoanBrand

README.md

@@ -1,25 +1,26 @@
 # SerialToTCPBridgeProtocol
  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. 
+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.
 
 
-See [STM32SerialToTCPBridgeClient](https://github.com/RoanBrand/STM32SerialToTCPBridgeClient) for an example of a client, written in c, that connects to a MQTT broker from a STM32 Nucleo F334R8 development board.
+See [STM32SerialToTCPBridgeClient](https://github.com/RoanBrand/STM32SerialToTCPBridgeClient) for an example of a client, written in c, that connects to a MQTT broker from a STM32 Nucleo F334R8 development board (ARM Cortex-M4).
 
 
 #### Details
 - The Go service opens a real TCP connection to a set destination on behalf of the serial client.
+- The client specifies the destination IPv4 address and port.
 - 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](https://en.wikibooks.org/wiki/Serial_Programming/Error_Correction_Methods) for background.
 - The service forwards traffic bi-directionally, as long as tcp connection is open and serial line is good.
 
 #### Future plans
-- Add config. Turn into os service. 
-- Sort out timeout bugs
-- Add ping to periodically test serial line
-- Multiple connections for clients to servers
-- Unit tests
+- Add config. Turn into OS service. 
+- Add ping option to periodically test serial line and drop upstream connection if timeout.
+- Separate connection and com interface concepts in code in preparation of 'multiple connections per client to servers' capability.
+- Unit tests.
 - PC side service to listen to all COM ports and concurrently spawn new connections for clients
-- Create a Arduino lib/client that extends the [Arduino Client class](https://www.arduino.cc/en/Reference/ClientConstructor) so that libraries for existing Ethernet/Wifi shields can theoretically work.
+- Create a Arduino lib/client that extends the [Arduino Client class](https://www.arduino.cc/en/Reference/ClientConstructor) so that libraries for existing Ethernet/Wi-Fi shields can theoretically work.