https://test-devzone.nordicsemi.com/f/nordic-q-a/88277/how-to-transfer-large-amounts-of-data-over-i2cHello, I am using the vl53l5cx TOF sensor and implementing the ULD using zephyr. My setup is a bl654 board using zephyr on sdk 1.9.1. However I am running into an issue, since the sensor is RAM based in the init() it&#39;s required to upload ~82kB ofen-USTelligent Community 13 Non-ProductionWed, 25 May 2022 13:02:04 GMThttps://test-devzone.nordicsemi.com/thread/369542?ContentTypeID=1Wed, 25 May 2022 13:02:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7cd492ef-0c93-4c4c-a0d5-0ef4f3ed5265user2111<p>I suggest to get a logic analyzer trace and see the data transferred on the twi bus, then you can also see the start, and re-start bits, and the device address and if the register address are incremented as expected. Alternatively you need to write it on byte level using direct address access, something like this:</p> <p><a href="https://test-devzone.nordicsemi.com/f/nordic-q-a/28367/i2c-driver-from-scratch-using-direct-register-access">https://devzone.nordicsemi.com/f/nordic-q-a/28367/i2c-driver-from-scratch-using-direct-register-access</a>&nbsp;</p> <p>Kenneth</p><div style="clear:both;"></div>