Bno080 detected but fails at dataAvailable()

[ionidestiny]

Bno080 detected but fails at dataAvailable()

My Bno080 fails right from the start but my Bno080 was detected on setup.

Your workbench

• ESP32 DevKit-Lipo
• GY-Bno080 custom
• Connect via I2C reference Design from Bno080 datasheet
• Powered by : LiPo battery / USB

Pins
VCC -----> ESP32 3.3V
GND -----> ESP32 GND
SCL -----> ESP32 PIN 22
SDA -----> ESP32 PIN 21
AD0
CS
INT
RST
PS1 -----> GND
PS0 -----> GND

Steps to reproduce

It fails on startup.

Expected behavior

Bno detected and dataavailable() should return true to allow for collection of data

Actual behavior

Bno detected but dataavailable() fails.

[nseidle]

We only have the resources to support our hardware so I can only guess:

• I forget but I think the BNO080 uses clock stretching. I think the ESP32 has problems with I2C stretching.
• Missing pull up resistors

[ionidestiny]

hi @nseidle
i've added a pull up resistor but im not entirely sure how to implement clockstretching for ESP32.

I stumbled upon this issue #16 but the esp32 wire.h does not include a function for wire.setClockStretchLimit();

is there a way i can stretch the clock limit for esp32.

thanks