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I have bought https://shop.pimoroni.com/products/pan-tilt-hat , it works fine, but I want to control it through a php webserver, but every time I try, it requires sudo but when I use sudo I get an error in /var/log/apache2/error.log 

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sudo: no tty present and no askpass program specified

Another question could be: How do I avoid having to use sudo with the pan tilt hat library

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  • Not Pi specific. – joan Jun 15 '18 at 17:13
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    It is, cause it's the hats python library that won't run without sudo so another question could be how do I avoid having to use sudo with the pan tilt hat library – Harcker Jun 15 '18 at 17:16
  • @Harcker, you only asked one question after your last edit ... your original post had no question – jsotola Jun 16 '18 at 5:25
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Give the apache user permissions to run sudo commands without password. Assuming the user in question is called www-data, add the following line to your sudoers file:

www-data ALL=(ALL) NOPASSWD:ALL

Once you get that working, you can restrict commands which could be run without password to hat-related only, so if your web server gets hacked, the attacker will not be able to run random commands as root.

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