MQTT not connected after update

Oh dear !!! That sounds like you have a “pre-systemd” OS ie Raspbian wheezy (or Minibian?) and the “mqtt_input” init script has been removed by the update script perhaps (See the “EmonPi problem after update” thread for more info)

I think that would have probably been before Glyn switched out the mqtt service from SysV to systemd (see the “Mqtt_input script run as systemd instead of initd” thread for more info).

That’s a shame, it would have shed some light on whats what,

Can you tell us the response to

ls -la /etc/init.d/mqtt_input

and also

ls -la /var/www/emoncms/scripts/mqtt_input

EDIT - and what is returned by this command too

ls /boot | grep emonSD