[sudo-discuss] arduino logic lever shifter 5v-3.3v for esp8266

[Jake]

just connect them together with two resistors like this page says:

http://michaelteeuw.nl/post/113107637802/esp8266-no-strings-attached

     ESP8266’s VCC is connected to a 3v3 power supply.
     ESP8266’s GND is connected to the ground.
     ESP8266’s RXD is connected to Arduino’s pin 4 using a voltage divider
     (330Ω to GND, 170Ω to pin 4).
     ESP8266’s TXD is connected to Arduino’s pin 5 (The Arduino can handle
     3v3 just fine.)
     ESP8266’s CH_PD is connected to VCC using a 10k pull up resistor.
     (This will enable the wifi module.)


On Fri, 5 Feb 2016, robb wrote:

> i've discovered 5v (arduino) to 3.3v (esp8266) serial requires a logic level shifter.
> i have a max3243 with no idea how to use it.
> 
> anyone know how to use a Multichannel RS-232 Line Driver/Receiver or
> know a good circuit schematic that converts 5v-3.3v logic?
> 
> thx
> ~r
> 
>