Board Arducam ESP32S UNO PSRAM I2C protocol issues

ESP32/ESP8266 Camera Boards
1

I am trying to get the time from a simple real time module that uses I2C protocol. I get the RT module to work with and ESP32 DEV board, but not with the Arducam PSRAM board. It looks like the SDA/SLC pins are not used/read/working?. I just bought the second arducam board thinking maybe i damaged the first one I used for a while.

Commands I am using is just including Wire.h, calling wire.begin in the setup proc and then

Wire.beginTransmission(DS3231_I2C_ADDRESS);
Wire.write(0); // set DS3231 register pointer to 00h
Wire.endTransmission();
Wire.requestFrom(DS3231_I2C_ADDRESS, 7);

On the Arducam board I get the same readout that I get from ESP Dev chip if I disconnect all the wires.

Do I need to do something special here to initialize the I2C protocol?

Thanks, Joe

 

2

Hi,

Please attach me your hardware setup.

For the Arducam ESp32S psram board， the i2c pin are 21 and 22.

static const uint8_t SDA = 21;
static const uint8_t SCL = 22;

Please ensure which pin you have connected your DS3231 module to.

 

3

I don’t want to hijack this thread but I am also having I2C issues on this board. I have a sparkfun SAM-M8Q module connected to the 3.3v, GND and SDA/SCL pins. What is the I2C pullup resistance on the board currently? Wondering if I need to remove the pullups on the SAM-M8Q.

 

Brett

4

Hello,

I am very very for missing your problems. Have you solved your i2c issue?