diff --git a/RCSwitch.cpp b/RCSwitch.cpp
index a144883..ac55acb 100644
--- a/RCSwitch.cpp
+++ b/RCSwitch.cpp
@@ -84,7 +84,8 @@ static const RCSwitch::Protocol PROGMEM proto[] = {
   { 200, {  3, 130}, {  7, 16 }, {  3,  16}, false},     // protocol 8 Conrad RS-200 RX
   { 200, { 130, 7 }, {  16, 7 }, { 16,  3 }, true},      // protocol 9 Conrad RS-200 TX
   { 365, { 18,  1 }, {  3,  1 }, {  1,  3 }, true },     // protocol 10 (1ByOne Doorbell)
-  { 270, { 36,  1 }, {  1,  2 }, {  2,  1 }, true }      // protocol 11 (HT12E)
+  { 270, { 36,  1 }, {  1,  2 }, {  2,  1 }, true },     // protocol 11 (HT12E)
+  { 320, { 36,  1 }, {  1,  2 }, {  2,  1 }, true }      // protocol 12 (SM5212)
 };
 
 enum {