Update README.md

Added Insulated version of wiring (ADUM1201 + DIY USB2TTL/Ve.Direct of Insulated version cable)

README.md

@@ -52,7 +52,7 @@ Please measure the voltage between TX and GND. In case of a logic level of 5V yo
 
 If you are unsure about to pin order please measure the voltage between GND and VCC (5V). If you measure a positive voltage you know the position of VCC and GND!
 
-### JST-PH jack
+### JST-PH jack (direct connection noninsulated)
 
 | Pin | Purpose | ESP8266 pin | ESP32 pin |
 | :-----: | :----------- | :------------- |:------------- |
@@ -61,12 +61,39 @@ If you are unsure about to pin order please measure the voltage between GND and
 | **3** | **TX** | D7 (**RX**) | GPIO16 (**RX**) |
 | 4 | 5V | | |
 
-note: _Level shifter (5V<->3.3V)between esp32 and mppt is not necessary_ (tested on esp32 nodemcu v1 and MPPT 75/115 , MPPT 150/35 and smartshunt 500A)
-
 <a href="images/circuit.jpg" target="_blank">
 <img src="images/circuit_thumbnail.jpg" width="50%">
 </a>
 
+note: _JST-PH connector on this image has lock downwards_
+<img width="70" alt="image" src="https://github.com/KinDR007/VictronMPPT-ESPHOME/assets/61905170/184607a8-4a18-437d-a859-d32b5c329a0b">
+
+
+
+
+note: ~~_Level shifter (5V<->3.3V)between esp32 and mppt is not necessary_ (tested on esp32 nodemcu v1 and MPPT 75/115 , MPPT 150/35 and smartshunt 500A)~~ 
+
+## Safe connection (insulated)
+ use `ADUM 1201` for galvanic isolation between ESP and Victron Devices (or make an insulated cable for Ve.direct)
+
+|Ve.Direct <img width="70" alt="image" src="https://github.com/KinDR007/VictronMPPT-ESPHOME/assets/61905170/184607a8-4a18-437d-a859-d32b5c329a0b"> _downwards_|Ve.Direct <img width="70" alt="image" src="https://github.com/KinDR007/VictronMPPT-ESPHOME/assets/61905170/c1e2f7c5-c9c1-4b34-9c8e-fb6dc1e144dd"> **upward** | Purpose (wire color)|connect|ADUM1201 #2| ADUM1201 #1 |connect| ESP8266 pin| ESP32 pin|USB TTL cable|
+|:-----| :----- | :----------- |:-----|:------------- |:------------- |:-----|:----- |:-----|:-----|
+| _1_ |**1** | **GND** (black) |<- ->| **GND2** | **GND1** |<- ->| **GND** |**GND**|**GND**|
+| _2_ |**2** | **RX** (red) |<- ->| **VOB** | **VIB** |<- ->| D8 (**TX**) | GPIO17 (**TX**)|**TX**| 
+| _3_ |**3** | **TX** (white) |<- ->| **VIA**| **VOA** |<- ->|D7 (**RX**) | GPIO16 (**RX**)|**RX**|
+| _4_ |**4** | **5V** or **3V3** (yellow) |<- ->| **VDD2** | **VDD1** |<- ->| **3V3 or 5V** | **3V3 or 5V** |**3V3 or 5V**|
+
+ ![adum1201_](https://github.com/KinDR007/VictronMPPT-ESPHOME/assets/61905170/9c7cf60c-fb19-404a-9c6e-7a17bc463ead)
+
+
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+
+
+
+---
+
 ## Installation
 
 You can install this component with [ESPHome external components feature](https://esphome.io/components/external_components.html) like this: