Circuit Diagram: TTGO ESP8266 0.91 Inch OLED

errolt

Good day everyone,

Does anyone know where to get a circuit diagram for the TTGO ESP8266 0.91 Inch OLED?

I am getting very high sleep current of 6mA in deep sleep.

If I run the same code on a wemos D1 Mini, with 0.91 Oled, then I get 0.15mA sleep current.

Only way to find the problem is with the circuit diagram...

Thank you,
Errol

errolt

Confirmed!

Bad design. USB chip is powered by battery? Even when no USB cable is plugged in? And the USB chip does not enter sleep, so draws 6mA from battery.

Removing USB chip drops sleep current down to the expected 0.08mA

I still need the circuit diagram to fix the circuit so I can put the USB chip back on the PCB.

errolt

And reset of USB chip is pulled to 5V, chip only allows 3.8V. I think this damaged the chip because even removing that pullup it still uses 6mA.

Lilygo