Hi rpdom, you're up early this morning!
rpdom wrote:GPIO 4 (pin 7) is used for the w1 (one-wire) bus, most commonly used for the DS18B20 temperature sensors. The driver will be polling the bus to look for devices every 10 seconds or so, and the rest of the time the pin will be used as input.
Check your /boot/config.txt for the w1-gpio dtoverlay line and comment it out to disable that driver.
I thought to myself " this seems like an easy fix " so I did a quick nano /boot/config.txt but the only line that says anything about dtoverlay relates to i2c-rtc,ds3231. I suppose I could use another GPIO without too much worry but the connector is quite tidy the way I have it at the moment.