diff --git a/avr/devices/c03/README b/avr/devices/c03/README
index 5caaa38..13cc9d7 100644
--- a/avr/devices/c03/README
+++ b/avr/devices/c03/README
@@ -4,13 +4,13 @@ C03
 
 - Role: Controller with Display
 - MCU: AtMega 644P
+- Bootloader: 0x7C00 (1024 words)
 - Connection: RJ45
 - Periphery:
   - Display with SPI
 
 
 
-
 SetLimits:
 aqhome-tool setdata -N nodes/xxxxxxxx/CO2_LIMIT_CRIT -v "LOWER:UPPER"
 aqhome-tool setdata -N nodes/xxxxxxxx/CO2_LIMIT_WARN -v "LOWER:UPPER"