The problem is in i2c addressing. In this case the slave address has 7 bits and it is needed to be shifted so the write bit is 0. Command registers need not be shifted, but he slave address has to.

Dear all, I am trying to setup the bq24735 power management unit with ESP32-WROOM-32. I have a problem with writing information to the BQ_CHARGE_OPTION_REG. Here is a recording from the logical analyzer: esp32.png The NACK is the problem. According to the datasheet write sequence should be this: dat...