diff --git a/avr/devices/r04/README b/avr/devices/r04/README
index e69de29..388a291 100644
--- a/avr/devices/r04/README
+++ b/avr/devices/r04/README
@@ -0,0 +1,13 @@
+
+R04
+===
+
+- Role: Router
+- MCU: AtTiny841
+- Connection: RJ45
+- Predecessor: none
+- UART: comonuart0 (uart_hw2), comonuart1 (uart_hw2)
+- Periphery:
+  - OWI interface
+    - DS18B20 temperature sensor
+
diff --git a/avr/devices/r05/README b/avr/devices/r05/README
index e69de29..004d17a 100644
--- a/avr/devices/r05/README
+++ b/avr/devices/r05/README
@@ -0,0 +1,13 @@
+
+R05
+===
+
+- Role: Router
+- MCU: AtTiny841
+- Connection: RJ45
+- Predecessor: R04
+- UART: comonuart0 (uart_hw2), comonuart1 (uart_hw2)
+- Periphery:
+  - OWI interface
+    - DS18B20 temperature sensor
+
diff --git a/avr/devices/t03/README b/avr/devices/t03/README
index e69de29..58c57bc 100644
--- a/avr/devices/t03/README
+++ b/avr/devices/t03/README
@@ -0,0 +1,13 @@
+
+T03
+===
+
+- Role: COM-PC-Interface
+- MCU: AtTiny841
+- Connection: RJ45
+- Predecessor: none
+- UART: comonuart0 (uart_hw2), ttyonuart1 (uart_hw)
+- Periphery:
+  - OWI interface
+    - DS18B20 temperature sensor
+