Depending on the MCU model you can have very different pull-up strengths (impedance if you will). The author doesn’t specify which MCU they were using (maybe STSPIN32F0A from STEVAL-ESC002V1, but I’m not sure if it’s acting as an I2C slave or master?), so it’s kinda complicated to draw meaningful conclusions from this article.
Depending on the MCU model you can have very different pull-up strengths (impedance if you will). The author doesn’t specify which MCU they were using (maybe STSPIN32F0A from STEVAL-ESC002V1, but I’m not sure if it’s acting as an I2C slave or master?), so it’s kinda complicated to draw meaningful conclusions from this article.