HC 05 programming with LEONARDO

Using Arduino Programming Questions
1

can anyone tell me how i can program a hc 05 module with LEONARDO. i already try to do with AT but when i type AT in serial monitor i get nothing , i set the baud rate to 38400 and bothNL and CR and
tx ==> tx
rx ==> rx
gnd ==>gnd
vcc ==> +5v
En ==> 3.3v
and then i hold that tiny push button on hc 05 and turn on the arduino
and yes it goes to at mode but i didn't gent anything on Serialmonitor wit AT commands.
(i flash a blank sketch before im going to do this)

oh yeah i also flash with Serial1.begin(38400); in void setup but same thing i got which is nothing :confused:

2

Please read my reply to your other post.

3 
tx ==> tx
rx ==> rx

Wrong

Transmit on one device sends to the device that receives it
So Tx to Rx and Rx to Tx

4

Hello!
First you make wrong circuit because you need only make four connection.

Bluetooth Module -- Arduino
VCC -- 5V
Gnd -- Gnd
TX -- RX
RX -- by Voltage divider -- TX

Because Arduino LEONARDO use 5V logic level and HC 05 use 3.3V logic level.

How did make Voltage divider image available.

You need only two resistor 1k and 2.2 K .

Ok.

IMG_20180710_005255.jpg
IMG_20180710_005255.jpg439×585 11.4 KB