ESP8266 (without Arduino)

6 years 9 months ago - 6 years 9 months ago #2053 by asm7100
Replied by asm7100 on topic ESP8266 (without Arduino)
HTU21D is with I2C interface to, and remember to pull the lines up.
www.google.dk/search?q=i2c+pullup&tbm=is...B7UasuDrQfZ-bY5wU%3D

Its a link to a picture on how to pull up I2C.
To pullup to 3v3 use 2k2.

And if your HTU21D is on a modul, maby the lines is already pullup. And you can only have one pullup on the string.

//
Allan

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6 years 9 months ago - 6 years 9 months ago #2054 by piman
Replied by piman on topic ESP8266 (without Arduino)
Thanks for the reply I take it are use to resistors on each line instead of just connecting the sensor directly to the ESP not quite sure on the resistor values but I found this
Would this be okay.
Also not sure how to call additional sensors to the url.
Thanks for your advice.

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6 years 9 months ago #2055 by asm7100
Replied by asm7100 on topic ESP8266 (without Arduino)
Yes it ok, if it NOT at the moduel with the HTU on it. :-)

//
Allan

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6 years 9 months ago #2056 by piman
Replied by piman on topic ESP8266 (without Arduino)
Thanks this is the one I have.

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6 years 9 months ago #2059 by asm7100
Replied by asm7100 on topic ESP8266 (without Arduino)
I think that the to black once is pullup

//
Allan

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