diff --git a/src/devices/switch.cpp b/src/devices/switch.cpp
index 5c9ebcadd..243869355 100644
--- a/src/devices/switch.cpp
+++ b/src/devices/switch.cpp
@@ -24,6 +24,11 @@ REGISTER_FACTORY(Switch, EMSdevice::DeviceType::SWITCH);
 
 Switch::Switch(uint8_t device_type, uint8_t device_id, uint8_t product_id, const char * version, const std::string & name, uint8_t flags, uint8_t brand)
     : EMSdevice(device_type, device_id, product_id, version, name, flags, brand) {
+    // check for EM10 module
+    if (device_id == 0x12) {
+        return;
+    }
+    // WM10 module, device_id 0x11
     register_telegram_type(0x9C, F("WM10MonitorMessage"), false, MAKE_PF_CB(process_WM10MonitorMessage));
     register_telegram_type(0x9D, F("WM10SetMessage"), false, MAKE_PF_CB(process_WM10SetMessage));
     register_telegram_type(0x1E, F("WM10TempMessage"), false, MAKE_PF_CB(process_WM10TempMessage));