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I have made a little project using WebIOPi, and it works like a charm. However, I have noticed that during the boot of the Raspberry Pi, all I/O pins are put at 0.6 V. This is enough to trigger my transistors and causes quite a lot of problems.

I am running the newest versions of WebIOPi and Raspbian, using a ABElectronics IOPi Expander.

How do I control the Raspberry Pi's behaviour during boot or is there a workaround?

goldilocks
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user3541930
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1 Answers1

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The state of the GPIO during startup is undefined, but on boot all should be set as input. If Console I/O is enabled TxD & RxD (8 & 10) will be configured for serial IO. There are on-board 1.8KΩ pullup on I2C (3 & 5). If you need to define the state of other pins you should include pullup resistors.

Milliways
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