Measure the voltage on GPIO.4 when it's low. It MUST be a low voltage(below 1V), if not you will have problems just like this. My guess is that you have a short on the base resistor to the PNP or forgotten it completely.
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Measure the voltage on GPIO.4 when it's low. It MUST be a low voltage(below 1V), if not you will have problems just like this. My guess is that you have a short on the base resistor to the PNP or forgotten it completely.
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