I built this board, but having 2 problems.. 1) the esp only seems to boot up when using external programmer RST button. Then blue light comes on, otherwise without external RST no blue light. 2) no output to OLED display. any advice?
@CTRONICS Looks like the schematic is wrong for R13 an R14. the values are listed as 15k and 2.2k, but per the datasheet of the MT3608 this would be ~4.7v output and this is what i am seeing. Vout = vRef * (1+ (r1/r2)). = 0.6 * 1 + (15k/2.2k) = 4.69.. we need 6v out so I think better values would be 15k and 1.6k ohm resistors. Also the reset RC circuit between EN and IO0 seems to be incorrect. Both EN and IO0 should be pulled high? Can you confirm?
@carlos33193 the resistors r13,r14 are correct. But the R5 is actually connected to 3.3v in blueprints. Not ground. It’s just a schematic error, I can confirm that in gerber files R5 connected between GPIO0 and 3.3v