How to disconnect 2 HM-10 BLE Modules?

Hi,
I am currently using 2 HM-10 BLE modules (It has the additional Crystal and USB Pads). I have connected it with ESP8266 NodeMCU board. How do I disconnect? The AT Commands do not work as it treats it as a message.

(Edit: I tried pulling down the BRK pin which also did not work)

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