NodeMCU ESP-32s Wroom Firmware update and Bluetooth problem

Hi.
I buy a NodeMCU v1.1 (first time using this device)

If i connect to the bluetooth of an Android cellphone (using SerialToSerialBT example in Arduino-IDE) i dont see the nodemcu as “connected”.

Look this is with the nodemcu already connected to the android cellphone (by the way, i try with different phones, all the same)

(first post i just cant put one embedded image)

This in settings:
cdb8464db1d33e971cb46aafc39aaa8051a29707_2_225x500

This when “Cabezota” (the nodemcu) is active, and connected


As you can see NOTHING, luckily i download an app called “Serial Bluetooth Terminal” and i found that i can send and receive messages from that app. Thanks to the app i noticed that the nodemcu was working and connected.

This is the normal behavior?? i mean, the android dont show that is connected to something in the “regular way”?

I think that maybe it is not, then… i want to try to update the firmware to see if this was “fixed”. But i dont know from where download the appropriated firmware to my nodemcu device.