ESP32ASCIIPrinter/kicad/bugs.txt

32 lines
1.3 KiB
Plaintext

Known bugs
Revision Current (no date yet)
------------------------------
Revision 2022-06-07
-------------------
- The LEDs for all bidirectional signals are activated only by pullups, which may lead
to low brightness and a signal voltage level that is below the desired 5V.
Workaround: Solder the LEDs in reverse and connect them to 5V instead of GND, as the
signal LOW state can sink more current. Will be fixed upon redesign/cleanup.
- 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.
- The ESP isn't programmable when inserted into the socket on the PCB. More and more
bootstrapping issues. In the end, the following remapping was necessary in total:
Signal Old New
ESP_D0 GPIO12 GPIO13 ok
ESP_D5 GPIO5 GPIO18 ok
ESP_STROBE GPIO15 GPIO19 ok
ESP_AUTOFD GPIO2 -
ESP_PAPER_EMPTY GPIO19 -