ESP32 talking to an HC-06..... nope

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I have an ESP32 WROOM talking to an HC-06 Bluetooth module.
Plenty of power (they are a bit juice hungry) and used them lots before.

This one is connected on Serial2 of the ESP32 Wroom.

Absolutely refuses to be talked to. I cannot get it to respond to the renaming commands that I always use.

My ESP32 is obviously 3.3v. The return from the HC-06 to the Esp32 is through a voltage divider to keep the levels correct.

Just wondered if maybe the 3.3v serial TX from the ESP32 isn't enough for the HC-06.
I would have thought it was, but I can't think of anything else.

Anyone had this issue?

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Just to be sure, can You via pen and paper show the Rx/Tx and the divider? Only the HC06 5 volt Tx needs dividing.....
Usually 3.3 volt output signals are accepted by 5 volt logic.
How about the power supple of the two circuits?

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2x Dud HC-06's out of 3. Brilliant! Thanks Ebay

Plugged in another one and it didn't even illuminate the led.
Tried the last one... fired up first time.

Says on the back that the serial comms is 3.3v

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