So maybe I can help.
I understand that Hantek is not related to TestController. The issue is that their original software, HDM3000 Ver1.7, does not work correctly with the device — the panel always shows “Overload” (in all versions).
TestController used to work perfectly, but after the latest update it stopped functioning.
Here is the connection log when it does not work:
; jSerialComm version: 2.11.2
;; Start thread for: COM1
;; Start thread for: COM10
;; COM1: Set params: 9600
;; COM10: Set params: 9600
;; COM1: Tx: <*IDN?.> 2A 49 44 4E 3F 0A
;; COM10: Tx: <*IDN?.> 2A 49 44 4E 3F 0A
;; COM10: Rx: <Hantek,HDM3055,CN214xxxxxxxxxxxx,2.0.0.4>
;; USB Serial Converter (COM10) Did not find any match for: Hantek,HDM3055,CN214xxxxxxxxx,2.0.0.4
;; COM10: Close
;; Stopping thread for: COM10
And here is the connection log when everything works (with the previous firmware version of the device):
;; jSerialComm version: 2.11.2
;; Start thread for: COM1
;; Start thread for: COM10
;; COM1: Set params: 9600
;; COM10: Set params: 9600
;; COM10: Tx: <*IDN?.> 2A 49 44 4E 3F 0A
;; COM1: Tx: <*IDN?.> 2A 49 44 4E 3F 0A
;; COM10: Rx: <Hantek, HDM3055, CN214xxxxxxxx, 2.0.0.4>
;; COM10: Tx <*RST>
;; COM10: Tx <*CLS>
;; COM10: Tx <*OPC?>
;; COM10: Rx: <1>
;; Found Hantek HDM3055 on USB Serial Converter (COM10) sn: CN214xxxxxxxx
;; HDM3055: Tx SENSe:FUNCtion?
;; HDM3055: Rx <"VOLT">
ps I have a version of the device with a COM port and USB, but unfortunately no LAN. I cannot connect to TestController via USB — I’m connecting through the COM port, as shown in the terminal log.