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Drok buck PSU UART not responding

sidtupper

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May 18, 2021
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I'm making a MPPT solar pump controller using a Drok buck PSU (200310) controlled with an arduino UNO R3, as shown in this drawing, using the library and example at https://github.com/bengineer19/BuckPSU. I'm stalled at not being able to communicate with the Drok. On a logic analyzer I can see that commands are getting to the Drok Rx pin but nothing is coming back on the Tx pin. I've tried obvious stuff like swapping Tx / Rx and various baud rates (9600 vs 4800) without success. I'd really appreciate hints on how to get past this.
 
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I'm making a MPPT solar pump controller using a Drok buck PSU (200310) controlled with an arduino UNO R3, as shown in this drawing, using the library and example at https://github.com/bengineer19/BuckPSU. I'm stalled at not being able to communicate with the Drok. On a logic analyzer I can see that commands are getting to the Drok Rx pin but nothing is coming back on the Tx pin. I've tried obvious stuff like swapping Tx / Rx and various baud rates (9600 vs 4800) without success. I'd really appreciate hints on how to get past this.
I am having the exact same problem-curious as to whether you were able to find a solution- if not, did you find a controllable power supply to replace it with? Thanks
 
Sorry … no progress. I shelved that project, hoping that a solution pops up. Drok support hasn’t been supportive; they sent me a link to a Chinese site where I downloaded a Windows binary they claim can command the PSU. It has a large and complex menu interface labeled entirely in Chinese. I’m not about to disassemble it to see how it works. I don’t know of a substitute. I’d be grateful to hear of progress you might make.
 
 
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