diff --git a/avr/modules/reed/main.asm b/avr/modules/reed/main.asm
index 87377e1..55a2c8d 100644
--- a/avr/modules/reed/main.asm
+++ b/avr/modules/reed/main.asm
@@ -164,6 +164,37 @@ REED_Run:
 
 
 
+; ---------------------------------------------------------------------------
+; @routine REED_OnPacketReceived @global
+;
+; @clobbers any, -X
+
+REED_OnPacketReceived:
+  adiw xh:xl, 2                                ; command
+  ld r16, X
+  sbiw xh:xl, 2
+  cpi r16, CPRO_CMD_VALUE_SET
+  breq REED_OnPacketReceived_set
+  clc                                          ; unexpected msg
+  ret
+REED_OnPacketReceived_set:
+  rcall CPRO_ReadValue                         ; (none)
+  cpi r17, VALUE_ID_REED_CONF
+  breq REED_OnPacketReceived_setReedConf
+  clc
+  ret
+REED_OnPacketReceived_setReedConf:
+  mov r16, r18
+  rcall REED_SetConfig
+REED_OnPacketReceived_sendAck:
+  ldi r16, CPRO_CMD_VALUE_SET_ACK
+  rcall CPRO_SendSetValueResponse
+  sec
+  ret
+; @end
+
+
+
 REED_Every100ms:
   push r15
     in r15, SREG