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

[robb]

@hol i agree, waiting a few weeks for delivery is killing me (already
ordered a couple).

@jake guess it's time to dig through the resistor box...i'm worried about
the 170Ω not being there though

hmm, chip-power-down (CH_PD) wants 10kΩ > vcc...i didn't know that.

thx all

On Fri, Feb 5, 2016 at 12:12 PM, Jake <jake at spaz.org> wrote:

> 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
>>
>>
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