Need Guidance... Teensy 4.0 Program Button was removed, now I need to press it...

JimKazmer

Well-known member
I am using the Teensy 4.0 in a combat robotics application. In the past, during matches when my Bot was hit really hard, the program button would trigger and cause my application to be disrupted... so I removed it. The white housing is still there, just the internal plastic button and small metal parts were removed.

I now have some "bad code" loaded, and the teensy loader won't load me new code. I need to press the button.

What can I do? Somewhat urgent... need to get this code done ASAP.
thanks
 

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I got this sorted. Turns out, besides the "bad code" my USB connection to the teensy was having issues.
 
Future: Looking at the T_4.0 card you'll see a Program Pin hole. If that is held to GND the Teensy will enter the bootloader mode same as if the button was pushed.
 
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