careyer Posted September 20, 2022 Share Posted September 20, 2022 (edited) Hi there, sadly I found this valuable information a bit too late (after purchasin two PowMr knockoffs of the MSB). Unfortunatly the PowMr also has a unpopulated 4-Pin Pinheader right next to the load output. I meassured all four lines with an oscilloscope and got the following result: 1.) 5V 2.) 3,3V 3.) 3,3V 4.) GND I tried the above sketch sending the Read command but got no reply. I wonder: - Has anyone ever tried with a PowMr? - From what I can tell this looks very much like a TX/RX TTL interface. Is this 5V or 3,3V signal level? - Maybe the firmware does not support empowering this port? - Is it possible to upload the MSB firmware to the PowMr, i.e. flash the MCU and hence make it compatible? - Does anyone have a firmware update file for the MSB at hand? Edited September 20, 2022 by careyer Quote Link to comment Share on other sites More sharing options...
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