ErnstMLuebeck
Member
Hello all,
My Teensy 4.0 (soldered to an AudioShield) worked without problems for some weeks. While working with a second Teensy (3.5) and not flashing the other one for some time, I realized that the 4.0 is not visible in the Arduino IDE any more. However it was powered by the iMac the whole time (connected to the keyboard USB port, see picture) and transmitting data to the 3.5 via an NRF24 as intended.
What I tried so far:
> Different cables, different USB ports (all cables and ports working fine with all my Teensys)
> Isolating it from other hardware (testing only Teensy+AudioShield, no change)
> Arduino IDE upgrade/downgrade (no change, all other Teensys still working, current version: 1.8.9)
> Teensyduino upgrade/downgrade (no change, all other Teensys still working, current version: 1.52-beta1)
> 15s push button restore to blink sketch (worked, now it is blinking faithfully, still not recognized)
> Holding down the button while plugging it in (no change, remains RED and Teensy loader does not program it)
> I pulled the VDD and both GND pins to disconnect the AudioShield (no change, see pictures)
> Downloaded TyCommander (does not show up, other Teensys do immediately)
> Connected it to my company Windows 10 notebook (does not appear in device manager)
> I cleared the NVRAM of my iMac (CMD + Option + P + R) in case it stored something about this USB device (no change)
Then I started Wireshark to see if there is anything on USB (no clue about USB though..):
> Connected to one of the USB 2.0 ports on the (old) iMac keyboard, Wireshark shows a stream of messages
> Connected to the USB 3.0 port on the back directly, nothing at all
Any ideas? I'm running out of ideas..
Best wishes,
Ernst
My Teensy 4.0 (soldered to an AudioShield) worked without problems for some weeks. While working with a second Teensy (3.5) and not flashing the other one for some time, I realized that the 4.0 is not visible in the Arduino IDE any more. However it was powered by the iMac the whole time (connected to the keyboard USB port, see picture) and transmitting data to the 3.5 via an NRF24 as intended.
What I tried so far:
> Different cables, different USB ports (all cables and ports working fine with all my Teensys)
> Isolating it from other hardware (testing only Teensy+AudioShield, no change)
> Arduino IDE upgrade/downgrade (no change, all other Teensys still working, current version: 1.8.9)
> Teensyduino upgrade/downgrade (no change, all other Teensys still working, current version: 1.52-beta1)
> 15s push button restore to blink sketch (worked, now it is blinking faithfully, still not recognized)
> Holding down the button while plugging it in (no change, remains RED and Teensy loader does not program it)
> I pulled the VDD and both GND pins to disconnect the AudioShield (no change, see pictures)
> Downloaded TyCommander (does not show up, other Teensys do immediately)
> Connected it to my company Windows 10 notebook (does not appear in device manager)
> I cleared the NVRAM of my iMac (CMD + Option + P + R) in case it stored something about this USB device (no change)
Then I started Wireshark to see if there is anything on USB (no clue about USB though..):
> Connected to one of the USB 2.0 ports on the (old) iMac keyboard, Wireshark shows a stream of messages
> Connected to the USB 3.0 port on the back directly, nothing at all
Any ideas? I'm running out of ideas..
Best wishes,
Ernst