I have dorji DBM-01 bluetooth module, which essentially uses TI CC2540 chip, just like other well known BT4 modules do, such as HM-11.
I have only connected the 3.3V and GND pins to see if it will be scanned by my iPhone.
Somehow, it didn't show up in the bluetooth device list when I turned the bluetooth on.
[Edit: I have just read that since BLE doesnt require pairing, it won't appear in the Devices list]
However, I tried bluefruit LE app for IOS by adafruit and it found the device. Also another app called lightBlue can see it. The weird thing is, when I connected to module through bluefruit LE software, name of the module appears in the bluetooth settings screen of iPhone as connected.
Another app called lightShow also offers the arduino code to control an RGB LED. However, this app cannot find this module when other two aforementioned apps can do find it.
Do you have any idea about the possible problems?