Search found 513 matches

by loboris
Tue Aug 06, 2019 7:09 am
Forum: General Discussion
Topic: Small ESP32 Modul ( all include in new ESP32-PICO )
Replies: 150
Views: 199257

Re: Small ESP32 Modul ( all include in new ESP32-PICO )

Even if you are using an RF certified module, your system (the final device) still will require testing. You will save money though, because it will require less testing than a full FCC / IC / CE certification of the underlying transmitter.
by loboris
Fri Feb 01, 2019 5:58 pm
Forum: ESP-IDF
Topic: Wear Leveling File System with Directory Support
Replies: 6
Views: 11149

Re: Wear Leveling File System with Directory Support

SPIFFS does not have directory support, but it can be easily implemented using SPIFFS metadata feature. I have SPIFFS with full directory support implemented in my MicroPython for ESP32 . LittleFS with full directory support is also implemented. It can be configured to run on top of Wear Leveling dr...
by loboris
Sat Jan 26, 2019 11:44 pm
Forum: ESP-IDF
Topic: Control the Timing of CS line ESP32 SPI
Replies: 1
Views: 4739

Re: Control the Timing of CS line ESP32 SPI

Configure SPI not to use hw CS. Then control the CS line from software...
by loboris
Fri Jan 25, 2019 7:51 pm
Forum: General Discussion
Topic: How to start external flash with SPI in esp32
Replies: 4
Views: 9164

Re: How to start external flash with SPI in esp32

Yes, it should not be too difficult to adapt an existing SPI eeprom driver or write your own based on datasheet...
by loboris
Fri Jan 25, 2019 9:38 am
Forum: General Discussion
Topic: How to start external flash with SPI in esp32
Replies: 4
Views: 9164

Re: How to start external flash with SPI in esp32

You are using the SPI Flash API for write/read, which is unrelated to the SPI Master API you have used to initialize the SPI bus.
You should write your own driver (or use an existing) to access the ST-25P80, which, BTW, is not a Flash chip, but SPI EEPROM.
by loboris
Tue Jan 15, 2019 8:53 pm
Forum: ESP-IDF
Topic: SPI: received data shifted by 1bit right
Replies: 1
Views: 5146

Re: SPI: received data shifted by 1bit right

Maybe you are using the wrong SPI mode. Try with mode 0.
by loboris
Mon Jan 14, 2019 10:47 am
Forum: General Discussion
Topic: running ESP32-D2WD at 240 MHz ??
Replies: 3
Views: 7436

Re: running ESP32-D2WD at 240 MHz ??

Why not use ESP32-PICO-D4? It is only slightly larger (7x7mm), but you can save some space because of the components integrated on it.

ESP32 always executes code from SPI-Flash (some code is transfered to IRAM).
by loboris
Sat Jan 05, 2019 6:01 pm
Forum: Hardware
Topic: GPIO0 connected to GND makes the esp32 enter download mode
Replies: 2
Views: 12261

Re: GPIO0 connected to GND makes the esp32 enter download mode

GPIO0 must be high on reset not to enter the bootloader mode, after booting you can use it as any GPIO.
Why is it held low and how is it driving SSR, via transistor or directly?
You should put a pull-up resistor on GPIO0 so that it is in high state during reset.