I recently had a prototype made that used a FT232RLSSOP and UMH3N for Usb to serial and programming. The circuit looks like this: SHOT1.PNG SHOT1.PNG SHOT1.PNG I thought this would be enough to automatically program the ESP32 for the arduino IDE, but I'm probably missing something. I get the followi...

Very interesting tread, but I've by now been able to get hold of a regular FireBeetle ESP32 module, and I can now confirm that that's actually using 0.02mA in deep sleep using exactly the same firmware (I'm actually using the simple timerWakuUp sketch that comes with the ESP core for arduino) that I...

For a custom board I'm building I'm experimenting with ways to make the power usage as low as possible when it's in deep sleep. My goal would be to keep it running for a few weeks on a 800mAh lipo. Currently the power usage of my board is 3mA at deep sleep, which would deplete my battery in about 11...

Thanks! I will ajust my circuit to fix that.

Do you think that could be the cause of the problem with the boards? or are there other steps I could take to fix the issue?

Attached a better resolution image schematic.png The fuel gauge (BQ27411) circuit does indeed have a 0.01 ohm resistor between 3.3v and VBATT, I copied that part of the circuit from the sparkfun battery babysitter: https://cdn.sparkfun.com/assets/learn_tutorials/5/3/0/sparkfun-battery-babysitter-v10...

Hi,

Sorry for my late reply. I'm indeed using the AP2112 3.3.

What do you mean by xtal? I do not have any crystal on the board I believe.

Sorry, forgot to attach the schematic
I basically started out with the schematic of the Adafruit Huzzah32 and adopted it to my needs

I'm having some trouble with a ESP32 based custom board I had created recently. I had 5 prototypes created, 3 of them work fine, but 2 of them only spit out garbage on the serial output, like this: serial garbage.PNG I can't get these boards into programming mode, not even when I manually pull gpio0...

Thanks for the clarification!

The UMH3N looks like a great part to save some space, will give it a try!

I recently had someone design a board for me that uses a ESP32-WROOM-32D and a FT232R USB to UART chip. The idea was to make the board in such a way that it would be programmable using the EspTool. Unfortunately, I'm unable to program the board. The only way I can program the board is by manually co...