What is the I2C transaction size for the STM32 HAL_I2C_Mem_READ Function? I know for Arduino the I2C transaction size is limited to 32 bytes but I was unable to find similar information about STM32's I2C. I'm currently using the STM32L010RB chip.

[DQiu.1]

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[Tesla DeLorean]

Not sure if the limit there is from the AVR or the driver.

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The STM32 doesn't have that issue. The Slave device might have limits to its auto increment, perhaps to 256 or the page boundary, check the Data Sheet for the slave.​