Divisor de tensión para TOUT (1V) Vin=5V R1=12k R2=3k Vout=1V Vin=3.3V R1=6.8k Vout=1.01V Note that since ESP8285 has SPI flash memory internally connected in DOUT mode, pins 9 and 10 may be used as GPIO / I2C / PWM pins