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POST No. 2408048
Arduino Portenta H7 and Dynamixel MKR shield - no motor response
2021-05-21 19:18:52 fry321

I am using an Arduino Portenta H7, Dynamixel MKR shield and MX-28AT which are connected as shown in the manual .


There is power to the servo as the LED briefly flashes when it is turned on, but I cannot get any of the examples from the DynamixelShield library to work. 


The code uploads and the debug output is seen on the serial monitor, but there is never a response from the servo. I'm mainly trying the scan example to make sure its not because I've got the id or baud rate wrong. 

I have tried a different servo too. 


Any suggestions of what to test next? Does a setting, like the `DXL_DIR_PIN` need to be changed?

2021-05-21 19:18:52
fry321
2021-05-25 13:19:42 Will Son

Hi,

Thank you for your inquiry.

We're currently investigating this issue and it seems like the Arduino mbed library switches the TX_EN signal too early so that the digital packet is truncated.

Once we find the exact reason and solution, we'll update the library as soon as possible.

Thank you.

2021-05-25 13:19:42
willson
2021-05-25 17:53:00 Nick Fry

Ok, thank you for looking into it!

2021-05-25 17:53:00
fry321