Thank you Ben,

I've updated libraries, but i have always the error message in debug COM port :

[0;31mE (372) i2c: i2c_param_config(647): i2c clock choice is invalid, please check flag and frequency[0m
[0;31mE (382) i2c: i2c_master_cmd_begin(1166): i2c driver not installed[0m

No activity in ...

My Hardware is an ESP WROOM 32.
Yes , the LED test is OK.
With the simple TEST I2C ESP32 program, with channel in software mode, i can read the activity on the oscilloscope .
With channel in channel 1 or 2 mode, there are no activity.

I tried to add the print 'test' in the loop. The problem is same.
Else, in I2C software emulation, i detect an activity on the I2C bus ( GPIO 22 and 21 ). The default frequency is 1 Khz. Oled screen wakes up with a random plot pixel .
The watchdog reset the ESP32 every 4 seconds.

With the Hardware ...

My OLED Adafruit own pull-up resistors. I wired an oscilloscope on the I2C signals. No activity on the SDA and SCL. The signals are 3.3V level.

I monitor the COM port and the see a problem on the DEBUG info :

[0;31mE (373) i2c: i2c_param_config(647): i2c clock choice is invalid, please check flag ...

I just made this wiring :

i have to find how enable the internal pull up...

it would be interesting if the initialization routines could return an information if everything went well

Hello Ben,

I didn't find any example about SSD1306-I2C in FC9 with ESP32.

This program in IDE Arduino works perfectly :

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 ...

Hello,

On the OLED Display SSD1306, on the I2c address, we can only select 0x78 or 0x7A
https://i.goopics.net/800/e1j1ud.png

In my case the I2C address is 0x3C.
Confirmed with an I2C scanner and with this example : https://www.instructables.com/Monochrome-096-i2c-OLED-display-with-arduino ...

Hello Ben,

Thank you very much !



Its works perfectly

Hello,

I encounter a difficulty with the ESP32 real time in FC9.
I make a simple program to generate a 1 khz signal on the GPIO1
https://i.goopics.net/800/NARNg.png


Every 5sec and during 40ms the signal is interrupted
https://i.goopics.net/800/3VbRa.png
https://i.goopics.net/800/npY0J.png ...