===== Q: I attached an IO-Link solenoid to the IOL HAT, but on switching, the communication fails =====

Errors like this one appear before failure:
<code>
[16:37:36 ERROR] PL: Got status error, REG_Status=0x00
</code>

===== A: The solenoid is causing transients on L+ =====
Some solenoids do not have a proper free-wheeling diode which causes spikes on ''L+''.

To solve this, do these steps either singly or in combination:
  * Use the parameter ''-b'' (e.g. ''-b 2'') to increase the blanking time. This makes the error detection more tolerant to voltage surges.
  * Connect a capacitor in parallel to ''L+'' and ''GND'' (e.g. 10µF). This will buffer the spikes.
  * If possible, connect a free-wheeling diode to the coil.