Search found 8912 matches

by ESP_Sprite
Sat Feb 04, 2023 1:03 am
Forum: Hardware
Topic: PCB check, and ideas
Replies: 16
Views: 4367

Re: PCB check, and ideas

Ah, that's much more readable. Just a nitpick: some people don't like 'Christmas trees' in their schematic, in other words, if you want to make it really clean, you want all your ground symbols to point down and your power rail symbols to point up. No need to change it for readability in this schema...
by ESP_Sprite
Sat Feb 04, 2023 12:41 am
Forum: Hardware
Topic: ESP32-S3-WROOM1 : Type of SPI Flash embedded ?
Replies: 6
Views: 1576

Re: ESP32-S3-WROOM1 : Type of SPI Flash embedded ?

Yes. There's FAT, spiffs and littlefs, for example.
by ESP_Sprite
Fri Feb 03, 2023 1:23 pm
Forum: ESP32 Arduino
Topic: ESP32-U4WD Preinstalled Bootloader
Replies: 4
Views: 1573

Re: ESP32-U4WD Preinstalled Bootloader

ESP chips come with a bootloader from the factory embedded in non-modifyable ROM. You both cannot and do not need to install your own bootloader to program them.
by ESP_Sprite
Fri Feb 03, 2023 1:20 pm
Forum: Hardware
Topic: ESP32-S3-WROOM1 : Type of SPI Flash embedded ?
Replies: 6
Views: 1576

Re: ESP32-S3-WROOM1 : Type of SPI Flash embedded ?

Currently, ESP chips can only boot from NOR flash. The difference between it and e.g. a SD card is that SD cards have an entirely different interface, tend to be much larger, and usually consist of NAND flash with an ASIC that acts as a translation layer to do wear leveling and error correction.
by ESP_Sprite
Fri Feb 03, 2023 1:17 pm
Forum: Hardware
Topic: Custom ESP32-C3 not detecting COM port (crystal problem?)
Replies: 15
Views: 5482

Re: Custom ESP32-C3 not detecting COM port (crystal problem?)

The thing is that on all current ESP chips, the crystal needs to be running before the CPU will try to boot from anything, so regardless of bootstrap pins or flash contents you should still see activity on the crystal.
by ESP_Sprite
Fri Feb 03, 2023 1:30 am
Forum: Hardware
Topic: PCB check, and ideas
Replies: 16
Views: 4367

Re: PCB check, and ideas

Before I start, have you looked at the hardware design guidelines ? - Your schematic is a mess of wires. Suggest you use nets (=those labels with the same name, as a random example this uses a lot of them) to clear things up so we don't have to manually follow traces. I probably didn't catch all mis...
by ESP_Sprite
Fri Feb 03, 2023 1:13 am
Forum: Hardware
Topic: Custom ESP32-C3 not detecting COM port (crystal problem?)
Replies: 15
Views: 5482

Re: Custom ESP32-C3 not detecting COM port (crystal problem?)

Are you sure the crystal footprint is correct and the crystal is soldered properly?
by ESP_Sprite
Fri Feb 03, 2023 1:09 am
Forum: Hardware
Topic: ESP32-C3 needs external flash chip?
Replies: 19
Views: 13663

Re: ESP32-C3 needs external flash chip?

If your problem is only the lack of flash, then yes, it would solve the issue.
by ESP_Sprite
Thu Feb 02, 2023 7:44 am
Forum: Hardware
Topic: ESP32-C3 needs external flash chip?
Replies: 19
Views: 13663

Re: ESP32-C3 needs external flash chip?

Yes, the ESP32-C3FN4 (like in that Mouser link) would work (although you'd probably want an 100nF from Vdd_spi to gnd for stability), a plain ESP32-C3 would not.
by ESP_Sprite
Thu Feb 02, 2023 2:22 am
Forum: Hardware
Topic: Custom ESP32-C3 not detecting COM port (crystal problem?)
Replies: 15
Views: 5482

Re: Custom ESP32-C3 not detecting COM port (crystal problem?)

C18 is not connected in your schematic (on purpose or otherwise). You do need that as it forms part of the RC network that properly resets the C3. Also, Vdd_spi generally needs a 1uF capacitor to ground. Both things should not stop the crystal from functioning, though; I'm afraid I have no idea what...