xinyuan-lilygo / esp32_s2 Goto Github PK

Hey,
i use the ESP32-S2-WROOM in a breadboard, so i look all the time to the face of the board,
the board label is on the back, the pinout datasheet is from behind too,

so i draw a pinout from the front:
ESP32-S2-WROOM.pdf
ESP32-S2-WROOM.pptx

On which pin is the LED connected. I have a red and blue LED showing up

There are dip switches on the board. But I haven't found anywhere that describes what these do if you change them.

Hello. I am having trouble connecting an SPI display to this board. With other ESP32 or ESP8266 I do it without problem.
What are the exact pins? In the documentation I cannot clarify myself with the RESET, CS and DC pins.

Thanks

Hello,

TLDR :
Documentations on the dip switch for the external oscillator are wrong and should be inversed.

I wasn't managing to get the external crystal to oscillate on my T8 board.
It's a Lilygo ESP32_S2 T8 (20-6-18 rev 1.1).

Indeed I made sure to enable the external 32khz crystal in config.
In SDKCONFIG I have : CONFIG_RTC_CLK_SRC_EXT_OSC=y

I measured directly on the oscillator, as the oscillator gets disconnected from the circuit from the pinout when the dipswitch is configured.
I wasn't always getting the ""32 kHz XTAL not found, switching to internal 90 kHz oscillator" message on startup, but I never measured the expected waveform at the pins.

I checked the T9 datasheet and observed the indications on the Lilygo website weren't matching what's described on the schematic.

I orientated the schematic so it matches the picture.
You want switch 1 and 3 to be pushed up to have access to the oscillator (indicated by XP/XN).

I confirmed by measuring the voltage at the pins, and proceeded to set the DIP switch to the GPIO settings.
And, what a surprise, I now get a signal from the oscillator :

Sorry for the lack of proper probing, I'm not in my lab, did the screen capture with my elbow, lol.

I was surprised by the signal's low voltage, but it looks that it's what's expected, voltages are close to what's captured on this other issue (see capture for 32k on branch 4.2) :
espressif/esp-idf#6621

Sincerely,

If you compare the small images and the large image the pins on the lower right are wrong.

Hello,

I bought a Lilygo TTGO T8 ESP32-S2 V1.1 ST77789, but the display remains desperately dark.

What settings should I use for (Bodmer's) TFT_eSPI?

Thank you.

Attached LiPo battery, I can measure 3.9V on the BAT and 3.3V on VDD3V3 but on V3V I measure 1.2V. Board doesn't work, no blue led.

When USB-C is plugged in the V3V pin measures 3.29V and the board works, blue led on.

Is there an external condition (connection/...) required to make this work? Or is the board faulty?