diff --git a/tasmota/tasmota_support/support.ino b/tasmota/tasmota_support/support.ino
index d2a8cd2c0..a9f189990 100755
--- a/tasmota/tasmota_support/support.ino
+++ b/tasmota/tasmota_support/support.ino
@@ -2324,6 +2324,14 @@ void I2cScan(uint32_t bus) {
   // I2C_SCL_HELD_LOW_AFTER_READ 2 = I2C bus error. SCL held low beyond client clock stretch time
   // I2C_SDA_HELD_LOW            3 = I2C bus error. SDA line held low by client/another_master after n bits
   // I2C_SDA_HELD_LOW_AFTER_INIT 4 = line busy. SDA again held low by another device. 2nd master?
+  //                             5 = bus busy. Timeout
+  // https://www.arduino.cc/reference/en/language/functions/communication/wire/endtransmission/
+  // 0: success
+  // 1: data too long to fit in transmit buffer
+  // 2: received NACK on transmit of address
+  // 3: received NACK on transmit of data
+  // 4: other error
+  // 5: timeout
 
   uint8_t error = 0;
   uint8_t address = 0;
@@ -2415,7 +2423,12 @@ bool I2cSetDevice(uint32_t addr, uint32_t bus) {
     return false;       // If already active report as not present;
   }
   myWire.beginTransmission((uint8_t)addr);
-  return (0 == myWire.endTransmission());
+//  return (0 == myWire.endTransmission());
+  uint32_t err = myWire.endTransmission();
+  if (err && (err != 2)) {
+    AddLog(LOG_LEVEL_DEBUG, PSTR("I2C: Error %d at 0x%02x"), err, addr);
+  }
+  return (0 == err);
 }
 #endif  // USE_I2C