updated docs

proxy.md

@@ -2,8 +2,15 @@
 There are two options to connect a melcloud wifi adapter / procon as slave.
 The slave works as normal and you are able to control the heatpump via the esp.
 
+### Custom proxy pcb
+[The easiest optionn is to use a custom pcb by @fonkse](https://github.com/gekkekoe/esphome-ecodan-hp/discussions/70#discussioncomment-11133291)
+
+@fonkse created a pcb + wires and it is basically plug and play. This is the recommended hardware setup for proxy.
+
+![image](https://github.com/gekkekoe/esphome-ecodan-hp/blob/main/img/proxy-setup.png?raw=true)
+
 ### Heishamon large V5
-[The easiest option is to use a Heishamon v5 (large).](https://www.tindie.com/products/thehognl/heishamon-communication-pcb/
+[Another option is to use a Heishamon v5 (large).](https://www.tindie.com/products/thehognl/heishamon-communication-pcb/
 )
  This option also allows you to use ethernet instead of wifi and has two relay switches available that can be used.
 Use the following diagram to create the connectors. 
@@ -22,7 +29,7 @@ Alternatively you can also rewire the melcloud wifi adapter / procon connector t
 
 NOTE: The current version of heishamon V5 requires a 10kΩ pull-up resistor on the RX line from the heat pump. It's recommended to solder it at the back side of the board.
 
-![image](https://github.com/gekkekoe/esphome-ecodan-hp/blob/main/img/solder.png?raw=true)
+![image](https://github.com/gekkekoe/esphome-ecodan-hp/blob/main/img/solder.png?raw=true)![image](https://github.com/gekkekoe/esphome-ecodan-hp/blob/main/img/heishamon-proxy.png?raw=true)
 
 Select the `esp32s3-heisamon.yaml` as configuration in `ecodan-esphome.yaml`. Build and flash the firmware. Connect the small connector to the slave and the large connector to the heatpump.