# RDK X5 cannot read I2C data

- Source: D-Robotics Developer Community
- Published: 2026-10-17T08:31:26.745Z
- RoboHot: https://robohot.news/en/items/k8l54qk7m4vryllowj80qhobw
- Original: https://forum.d-robotics.cc/t/topic/35796

## Summary

On an RDK X5 V1.0, reading from both I²C sensors, the VEML7700 (address 0x10) and the VL53L8CX (address 0x29), failed, with address NACK, a timeout of about 1.06 seconds, and a Remote I/O error. The same two modules read successfully on an ESP32-C3 at 100kHz, and the VL53L8CX also output 8×8 distance data at about 2Hz.