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Microstepping on SKR2 with TMC2209

Arturo Caballero

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I understood that you could program the microstepping in TMC2209's by using the UART interface. I connected the UART jumper as shown in the user guide. However, I can't change the microsteps by changing $150. In fact $150 shows 16 but in reality the motor moves as if it was 8. If I can't change  $150 it remains at 16. The only way I can change the microsteps is with the jumpers on MS1 and MS2. How can I change the microsteps with the UART interface?


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  • 2 weeks later...

Hi ,

Thanks for your feedback.

Maybe the uart is not successfully connected,

Please check whether the jumper cap and driver are wire properly ; please send the command M122 to get the feedback information of the TMC2209 driver, from which you can see the set number of subdivisions and whether the connection is successful.



Edited by BTT Tony
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