ESP32 Forum

I am using quectal m95 gsm module with esp32 board to create a point to point cellular connection, Can i connect thier TX and RX pins directly or i need to do some volatge level conversions???

Check the datasheets for voltage levels. ESP32 uses 3.3V so if your devices uses the same you should be good to go.

Check the datasheets for voltage levels. ESP32 uses 3.3V so if your devices uses the same you should be good to go.

my gsm module uses something around 3.9 to 4 V, what should i do.

4V logic? Sounds like an odd value. Are you sure about that?

In any case, use a levelshifter, such as the TXB0102DCUR.

You could also use a simple voltage divider based on two resistors for each channel.