[SOLVED] Help: Switch from UNO to ESP32

Other Hardware General Electronics
1

Hi guys,
as advised by some of you I decided to switch from Arduino UNO to ESP32.
I tried connecting my DHT11 and my BMP085 (connected via I2C) with poor results.
In the case of the BMP I scanned with the example part of the ESP32 board manager and found nothing, currently it is connected SCL > GPIO22 and SDA > GPIO21. Looking for information I have not read of similar problems. Am I doing something wrong?
Regarding the DHT module, however, I think it is missing a 10kΩ resistor on the data output since the board only accepts 3.3V voltage input.

Can you guys help me clearing my doubts?

2

Coincidentally, this morning, I successfully ran a SX1509 (I2C expander) example sketch without modification.
(And, yes, SCL (22) and and SDA (21) as you described .)

3

I take it as a comment to keep the post up :sweat_smile:

4

UNO is 5v, ESP32 is 3.3v, have you followed all the precautions and connected your sensor accordingly so that it outputs 3.3v? The doc sheet for the sensor should tell you how

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I meant to confirm that Wire.h works with ESP32, viz. SCL (22) and SDA (21).

Where are these "advisors" when you need them?

A Uno to ESP switch is indeed abrupt, no mean feat.

6

You're right.

Btw, it was a wire connection problem, changing the jumper wire the BMP085 worked as expected. Thanks for you interest man

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