Sparkfun ESP32 thing & Sparkfun GPS RTK (SMA) breakout

Qwiic System
1

Hello,

i have Sparkfun ESP32 thing and Sparkfun GPS RTK breakout with ZED-F9P. Both devices is connected via I2C bus. Arduino Wire example (uploaded to ESP32) successfully detects ZED-F9P at address 0x42, but any of the Sparkfun examples coming with Sparkfun GNSS Arduino library (for example Example15_GetDateTime) does not able to connect to ZED. I2C bus is connected at pins 21 + 22 on SF ESP32 thing and on SDA and SCL pins on ZED + GND of course.

All examples write to USB:

u-blox GNSS not detected at default I2C address. Please check wiring. Freezing.

Please anyone knows where the problem is?

Thank you

2

Oops. It’s my fault. I configured the ZED module in the u-center as input/output RTCM3 at I2C bus and the library could not logically communicate with the module with this mode. After returning the value of UBX + NMEA + RTCM3 everything works. Maybe at least it’ll help someone who’s done as stupid as me.