diff --git a/doc/AtomS3-PortABC-CAN.jpg b/doc/AtomS3-PortABC-CAN.jpg
new file mode 100644
index 00000000..fb03e0f8
Binary files /dev/null and b/doc/AtomS3-PortABC-CAN.jpg differ
diff --git a/doc/AtomS3Can.jpg b/doc/AtomS3Can.jpg
new file mode 100644
index 00000000..ca287c1a
Binary files /dev/null and b/doc/AtomS3Can.jpg differ
diff --git a/doc/Hardware.md b/doc/Hardware.md
index af4c8556..7e23c9e7 100644
--- a/doc/Hardware.md
+++ b/doc/Hardware.md
@@ -86,6 +86,8 @@ M5 Stack AtomS3Lite Canunit (experimental since dev20230826)
 * Build Define: BOARD_M5ATOMS3_CANUNIT
 * Power: Via USB
 
+![M5_Atom_S3 with CAN unit](AtomS3Can.jpg)
+
 M5 Stick C Canunit
 ------------------
 * Hardware: [M5_StickC+](http://docs.m5stack.com/en/core/m5stickc_plus) + [CAN Unit](http://docs.m5stack.com/en/unit/can)
@@ -98,6 +100,14 @@ M5 Stick C Canunit
 
 Can be used e.g. as an NMEA2000 Adapter for a laptop running e.g. OpenCPN with the NMEA2000 Data converted to NMEA0183.
 
+M5 Stack AtomS3Lite PortABC+CAN+ENV3
+------------------
+* Hardware: [M5_ATOMS3 Lite](http://docs.m5stack.com/en/core/AtomS3%20Lite) + [M5_PORTABC](https://docs.m5stack.com/en/unit/AtomPortABC) + [CAN Unit](http://docs.m5stack.com/en/unit/can) + [M5 ENV3](https://docs.m5stack.com/en/unit/envIII)
+* Build: [Online service](BuildService.md)
+* Power: Via USB
+
+![M5_Atom_S3 + PortABC + CAN unit + ENV3](AtomS3-PortABC-CAN.jpg)
+
 Node MCU32s -  [Homberger Board](https://github.com/AK-Homberger/NMEA2000WifiGateway-with-ESP32)
 --------------------------------------
 * Hardware: see link in heading
diff --git a/webinstall/build.yaml b/webinstall/build.yaml
index cdfde68d..17ecd60f 100644
--- a/webinstall/build.yaml
+++ b/webinstall/build.yaml
@@ -147,6 +147,11 @@ types:
         description: "M5 Gps Unit"
         url: "https://docs.m5stack.com/en/unit/gps"
         resource: serial
+      - label: "RS232/RS422"
+        value: SERIAL_GROOVE_232#grv#
+        description: "Generic RS232/RS422 Unit"
+        url: "https://github.com/oxbown/esp32-nmea2000/tree/master/doc"
+        resource: serial
 
   - &m5groove
     type: select