Error: Improv initialization failed. Error: Improv Wi-Fi Serial not detected

[hossain-khan]

I am seeing this error in console, however the UI doesn't show any error. So, I wasn't very comfortable flashing the TRMNL after this.

install-dialog-BQTNxCWK.js?module:825 Improv initialization failed. Error: Improv Wi-Fi Serial not detected
    at install-dialog-BQTNxCWK.js?module:493:1210

Is this something I should ignore, or it needs to be handled by the app?

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2026-02-28.07.49.19.mp4

Related fix:

• Filter serial port picker to TRMNL ESP32-C3 devices only #7

[hossain-khan]

In previous session, I was not in "Flashing Mode" - so the connect window didn't show JTAG

However, even after selecting JTAG i saw the same error

2026-02-28.07.56.15.mp4

[hossain-khan]

Update

I went ahead an tried to install anyway. It worked ✅

I think, one improvement could be made is, when user select non-JTAG device, it should show error/warning that TRMNL device is not detected.

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2026-02-28.08.01.03.mp4