Update README.md

Added e2e diagram and reference material 

Signed-off-by: nserway <[email protected]>

README.md

@@ -24,7 +24,7 @@ Below is a table of demonstrations that are currently available.
 | **One EV ↔ EVSE (AC Simulation)** | Simple AC charging session with one EV connecting to one Charger (EVSE) | [One EV ↔ EVSE (AC Simulation) Diagram](#one-ev-to-evse-ac-simulation) |
 | **One EV ↔ EVSE (ISO 15118-2 DC)** | ISO 15118-2 compliant charging session with one EV connecting to one EVSE | [One EV ↔ EVSE (ISO 15118-2 DC) Diagram](#one-ev-to-evse-iso-15118-2-dc)|
 | **Two EV ↔ EVSE** | Two EVSE connector points showcasing EVerests ability to work with a CSMS in a multi-station context | [Two EV ↔ EVSE Diagram](#two-ev-to-evse) |
-| **E2E Automated Tests** | Performs an automated test of a full charging session| N/A |
+| **E2E Automated Tests** | Performs an automated test of a full charging session| [E2E Automated Tests Diagram](e2e-automated-tests) |
 | **OCPP Demos** | Various OCPP 1.6J and 2.0.1 compliant charging sessions with differing security profiles| [OCPP Demo Diagram](#ocpp-demos)|
 
 ## Operating System Specific Instructions
@@ -172,6 +172,9 @@ please add the details to the "Additional Functionality" section
 
 ## Reference Material
 
+For more information around ISO 15118-2 and OCPP messaging,
+see the below standards documentation.
+
 - [ISO 15118-2 Documentation](https://www.typhoon-hil.com/documentation/typhoon-hil-software-manual/References/iso15118_protocol.html)
 - [OCPP 2.0.1 Documentation](https://openchargealliance.org/my-oca/ocpp/)
 
@@ -273,6 +276,29 @@ sequenceDiagram
 
 ```
 
+### E2E Automated Tests
+
+```mermaid
+
+sequenceDiagram
+
+participant EVerest
+participant Probe Module
+participant MQTT
+par docker boots
+EVerest ->> EVerest: Boot
+Probe Module ->> Probe Module: init
+end
+Probe Module ->> MQTT: subcribe to session_event
+Note over EVerest, MQTT: Test
+Probe Module ->> EVerest: call_command 
+loop timeout or events
+    Probe Module->>MQTT: get message
+    Probe Module->>Probe Module: assert
+end
+
+```
+
 ### OCPP Demos
 
 ```mermaid