Need help with not being able to send data through bluetooth module

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2

I'm using an HC-05 with the rx pin connected to d4 and tx to d5 of an Arduino nano.

SoftwareSerial mySerial(4, 5); // RX, TX

You need to be cross connected. RX module > TX Arduino(pin5) and TX module > RX Arduino(pin4).

It's best to use a voltage divider on the Arduino Tx > Module Rx so that 5v is dropped to 3.3.

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