Search found 13 matches

by Fusion
Mon Feb 20, 2023 11:10 am
Forum: ESP32 Arduino
Topic: ESP32-C3 odd USB problems and no communication
Replies: 2
Views: 2327

Re: ESP32-C3 odd USB problems and no communication

Would anyone happen to know why it is required to run espefuse summary to fix the USB?
by Fusion
Sat Feb 18, 2023 8:26 pm
Forum: ESP32 Arduino
Topic: ESP32-C3 odd USB problems and no communication
Replies: 2
Views: 2327

Re: ESP32-C3 odd USB problems and no communication

So I got it working by setting USB CDC and Enable Erase Flash in Arduino IDE.

Still preplexed why I had to run espefuse summary to get the USB to stop acting up though.
by Fusion
Sat Feb 18, 2023 6:40 am
Forum: ESP32 Arduino
Topic: ESP32-C3 odd USB problems and no communication
Replies: 2
Views: 2327

ESP32-C3 odd USB problems and no communication

I have a custom ESP32-C3-WROOM-02 board keeps connecting/disconnecting the USB port. I can see the port come up in Arduino IDE, but 2 seconds later it disappears, then come back and so on D-/D+ is connected directly to IO18/19. The board of course has 5V to 3V3 for power. An original dev board from ...
by Fusion
Tue Jan 31, 2023 1:09 pm
Forum: Hardware
Topic: Adding an EMI shield over ESP32 SOCs
Replies: 1
Views: 1199

Adding an EMI shield over ESP32 SOCs

Would anyone happen to know which components should be covered by an EMI can? I am working with limited available space under then can. It seems I will be able to fit the SOC and some passives like the 3V3 decoupling capacitors. Should I also try to cram the antenna coil or any other passives under ...
by Fusion
Tue Mar 08, 2022 8:35 am
Forum: General Discussion
Topic: ESP32 with CP2102N QFN-20
Replies: 0
Views: 1006

ESP32 with CP2102N QFN-20

Hi all! Would anyone happen to have experience with the QFN-20 version of the CP2102N and ESP32? An autoprogram circuit with a dual transistor uses DTR and RTS to pull EN and IO0 low. The QFN-20 does not have a DTR pin. Is the alternative as simple as programming GPIO1 or 0 on the CP2102N to be low ...
by Fusion
Thu Nov 01, 2018 6:19 am
Forum: ESP32 Arduino
Topic: Problem with pullup on serial pin
Replies: 5
Views: 13764

Re: Problem with pullup on serial pin

Thank you, this worked.
Also the baud rate was 9600, even though manf. says 38400 in datasheet.
by Fusion
Mon Oct 29, 2018 12:04 am
Forum: ESP32 Arduino
Topic: Problem with pullup on serial pin
Replies: 5
Views: 13764

Re: Problem with pullup on serial pin

@WiFive

So what is the best option in my case (ESP32 wroom)?
Is there another way to test this before burning the fuses?
by Fusion
Sat Oct 27, 2018 5:12 pm
Forum: ESP32 Arduino
Topic: Problem with pullup on serial pin
Replies: 5
Views: 13764

Re: Problem with pullup on serial pin

12 (MTDI) If driven High, flash voltage (VDD_SDIO) is 1.8V not default 3.3V. Has internal pull-down, so unconnected = Low = 3.3V. May prevent flashing and/or booting if 3.3V flash is used and this pin is pulled high, causing the flash to brownout. See the ESP32 datasheet for more details. Is this w...
by Fusion
Fri Oct 26, 2018 12:43 am
Forum: ESP32 Arduino
Topic: Problem with pullup on serial pin
Replies: 5
Views: 13764

Problem with pullup on serial pin

Hi guys, I have an external module connected to the ESP32 with hardwareserial as RX GPIO12, TX GPIO14. HardwareSerial Serial2(2); void setup() { Serial2.begin(38400, SERIAL_8N1, 12, 14); } The module datasheet states that it's UART TX pin is open drain and needs a 10K ohm pullup (in my case to 3.3V)...