Known bugs

Revision Current (no date yet)
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Revision 2022-06-07
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- The PCF8574 is not suitable for our needs, as it can't source enough current
  (300 µA max). Also it has a too-high leakage current, so that the relays are
  switched on permanently, when the pins are in input state.
  Workaround: Replace the part with the pin compatible PCA9554D
  Will be fixed upon redesign/cleanup.

- The DMP3098 transistor is integrated backwards (swapped Source/Drain)
  Workaround: Remove Q2 and the resistors, replace Q1 with a
  suitable N-channel part like AO3422
  Will be fixed upon redesign/cleanup.

- The pulldown resistor for the TCS signal bus has a too small footprint for the
  current it has to withstand, and the needed value isn't determined properly yet.
  Workaround: Solder a 1x2 female header on the pcb pads of Q1 (or the nearby
  desoldered resistor) and the tcs signal, for providing a swappable method (wired
  resistor).
  Will be fixed upon redesign/cleanup, utilising a 1x2 2.54mm tht footprint and a
  1206 resistor footprint in parallel

- ESP32 (azdelivery) has a wrong symbol where the "CMD" pin is labelled as GND, which
  resulted in a short to GND on this pin.
  Workaround: Remove the contacts from the pinheader that connects the PCB to the ESP.
  Will be fixed upon redesign/cleanup.

- ESP32 GPIO12 is not supposed to be pulled up HIGH during boot (the pin doubles as a
  bootstrapping pin, and will result in a boot loop if set to HIGH)
  Workaround: Cut trace at the GPIO12 pin, connect the signal to GPIO13
  Will be fixed upon redesign/cleanup.