on Pi, TOF delayed at switch-off physical PI pin

thiagoralves / OpenPLC_v3

OpenPLC Runtime version 3

GNU General Public License v3.0

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on Pi, TOF delayed at switch-off physical PI pin #78

Closed jancumps closed 5 years ago

jancumps commented 5 years ago

When using the Hello World example on a Raspberry Pi 3B, Linux raspberrypi 4.14.98-v7+ #1200, when executing the example, the output %QX0.0 nicely switches off after 2 seconds in the OpenPLC Monitoring page. The physical pin 8 on the PI connector stays 3.3V for various time between 2 and 11 seconds though, before returning to 0V level.

thiagoralves commented 5 years ago

Make sure you don't have any other process (including Serial, i2c or SPI configuration) trying to control that pin. Its always recommended to install OpenPLC on a clean Raspbian image