WIZnet Developer Forum

WIZISP can`t open COM port. Updating Firmware WIZ750SR

I cant update the firmware, because WIZISP cant open COM port., (pic.1)

,
but other terminal programms sucsessfully connects to the WIZ750SR and receiving data as ot shown at pic. 2. and 3 either in BOOT mode, or at Normal mode.
(https://2.downloader.disk.yandex.ru/preview/be33a2d76331e20faa97c1d99f7901b647faa425ed52c799401ba3f5402003bb/inf/ls0c5--jXQJvKfsw4HeNHUPqVy1x79_wGxnbvp28awmr11SGlHKyF0m5G3-TTZ25xL-dUqMFm5tvURa15q8JDg%3D%3D?uid=47987437&filename=51TjAeSHdmL.AC_SX569.jpg&disposition=inline&hash=&limit=0&content_type=image%2Fjpeg&owner_uid=47987437&tknv=v2&size=1903x920)

(https://1.downloader.disk.yandex.ru/preview/bf0402a3a53c5b137bed4e3a0e18567b80ef205e4d3988003cf0cbc40c22b33d/inf/yBXBkdpa-zQWeR-6p1LBjVZEzdqMgDDpxsW7DuIdftrvRxbtTqEemDFBoZR7BgOrM2POzwEXHmM_t9aYQ_UmbQ==?uid=47987437&filename=W7500S2E-Z1-Side-e1550545895160-2-300x217.png&disposition=inline&hash=&limit=0&content_type=image%2Fpng&tknv=v2&owner_uid=47987437&size=1903x920)

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