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A comment on FlipperZero: 1 Month Battery Life with Firmware Update. Parent comment

Re:FlipperZero: 1 Month Battery Life with Firmware Update by cdchn on Friday April 28, 2023 @01:11AM (#35737657)
I think people have managed to use the GPIO pins as a bit bang transmitter.
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Re:FlipperZero: 1 Month Battery Life with Firmware Update by sebcat on Friday April 28, 2023 @06:01AM (#35739382)
See https://github.com/F5OEO/rpitx
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