Re: SHC not working
You should get at least the OnStep logo on the display... that is done before anything else.toggle quoted messageShow quoted text
Check that your display's pin order matches the order in which the PCB is routing them. Some OLED modules have the order VCC GND SCK SDA and others have GND VCC SCK SDA (i.e. the order of VCC and GND are reversed). Some modules also have zero-ohm chip resistors on the back that allow you to switch the order from the default, which is silkscreened on the front, to the other order.
In order to accommodate this, I designed the ESP32 SHC PCB with jumpers to either side of the OLED header so that you could reverse the order without having to buy a different module or rework the chip resistors that you may or may not have. The Teensy PCB does not have such jumpers so your choices would be surgery or buy a different module (many eBay vendors offer both types explicitly now whereas before it was random as to what you got).
On 2021-01-10 8:58 a.m., andrea tasselli via groups.io wrote: