diff --git a/README.md b/README.md
index 40d66b7b..26bfb437 100644
--- a/README.md
+++ b/README.md
@@ -270,7 +270,9 @@ This can be achieved by copying one of the [env:....] sections from 'platformio.
 -DHOYMILES_PIN_CE=4
 -DHOYMILES_PIN_CS=5
 -DVICTRON_PIN_TX=21
--DVICTRON_PIN_RX=22 
+-DVICTRON_PIN_RX=22
+-DPYLONTECH_PIN_RX=27
+-DPYLONTECH_PIN_TX=14
 ```
 It is recommended to make all changes only in the  'platformio_override.ini', this is your personal copy.
 You can also change  the pins by creating a custom [device profile](docs/DeviceProfiles.md).
diff --git a/platformio.ini b/platformio.ini
index 96d8e7e5..5ccc4346 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -55,6 +55,8 @@ build_flags = ${env.build_flags}
     -DHOYMILES_PIN_CS=5
     -DVICTRON_PIN_TX=21
 	-DVICTRON_PIN_RX=22
+    -DPYLONTECH_PIN_RX=27
+    -DPYLONTECH_PIN_TX=14
 
 
 [env:olimex_esp32_poe]