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I figured this out. I had a serial print line in the code which was keeping the pin high. I took this out and it works.
is there a trick for getting gpio3 as output. I had gpio2 working but with the pull up at boot I need to use gpio3. but for some reason it is always outputting high
Easy ultrasonic 4-pin sensor monitoring (hc-sr04)
AlexaPi + IFTTT
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