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these are cheap and easy to use https://www.adafruit.com/products/757<br /><br />

<p><br />On 2016-02-05 11:44, robb wrote:</p>

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<div>i've discovered 5v (arduino) to 3.3v (esp8266) serial requires a logic level shifter.</div>

i have a <a href="http://www.ti.com/lit/ds/symlink/max3243.pdf">max3243</a> with no idea how to use it.<br /><br /></div>

anyone know how to use a<span style="font-size: small;"> Multichannel</span><span style="font-size: small;"> RS-232</span><span style="font-size: small;"> Line</span><span style="font-size: small;"> Driver/Receiver or<br /></span></div>

<span style="font-size: small;">know a good circuit schematic that converts 5v-3.3v logic?<br /><br /></span></div>

<span style="font-size: small;">thx<br /></span></div>

<span style="font-size: small;">~r<br /></span></div>

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