Search found 178 matches

by boarchuz
Tue Dec 31, 2019 11:04 am
Forum: ESP32 Arduino
Topic: Count 2µs pulses with ULP
Replies: 1
Views: 310

Re: Count 2µs pulses with ULP

So I understand correctly, the signal is normally high (idle) and is then low for >=2 uS? How frequent is this low pulse? It will be tight, but might be possible. ULP instructions take 4-12 cycles total, at 8 MHz, which works out to 0.5-1.5uS, so you don't have any time to spare. You'll have to stri...
by boarchuz
Tue Dec 31, 2019 10:18 am
Forum: Hardware
Topic: Esp32-PICO-D4 Antenna Matching circuit
Replies: 2
Views: 334

Re: Esp32-PICO-D4 Antenna Matching circuit

There's no "correct", a matching network needs to be tuned for each particular PCB design and so will vary between them. The first schematic has a placeholder (don't pay too much attention to the values or symbols, they will share the same footprint and so any of those positions may be populated wit...
by boarchuz
Tue Dec 31, 2019 12:45 am
Forum: IDEs for ESP-IDF
Topic: Official Visual Studio Code Extension for ESP-IDF Projects
Replies: 9
Views: 1765

Re: Official Visual Studio Code Extension for ESP-IDF Projects

Do you know when it will be available on the marketplace?
by boarchuz
Fri Dec 13, 2019 4:02 pm
Forum: General Discussion
Topic: ESP32 interface with I/O Expander
Replies: 4
Views: 451

Re: ESP32 interface with I/O Expander

john_peter wrote:
Fri Dec 13, 2019 3:46 pm
The direction of port PA00 configured as output and then set to low voltage level
Other way around. Prepare the level, then enable output.
by boarchuz
Wed Dec 11, 2019 8:27 pm
Forum: Hardware
Topic: pull down resistor's value for low deep sleep current
Replies: 3
Views: 421

Re: pull down resistor's value for low deep sleep current

Ignore the ESP32 for a moment, and notice that you've got a simple circuit with a resistor and a switch between V+ and V-. When (and only when) that switch is closed, the circuit is complete, and current will flow across the resistor. So you want the switch to be in an open (disconnected) state most...
by boarchuz
Wed Dec 11, 2019 1:25 am
Forum: ESP32 IDF
Topic: ULP coprocessor wakeup + RTC_PERIPH ON
Replies: 1
Views: 179

Re: ULP coprocessor wakeup + RTC_PERIPH ON

bump
by boarchuz
Sun Dec 08, 2019 4:39 pm
Forum: General Discussion
Topic: Questions about ULP in deep sleep
Replies: 1
Views: 199

Re: Questions about ULP in deep sleep

1. It works the same as reading any other register. The only thing to keep in mind is that you need to flag the RTC controller to update the register with the current tick count beforehand. Using macros: I_WR_REG_BIT(RTC_CNTL_TIME_UPDATE_REG, RTC_CNTL_TIME_UPDATE_S, 1), //Set update bit I_RD_REG(RTC...
by boarchuz
Mon Dec 02, 2019 5:49 am
Forum: ESP32 IDF
Topic: ULP coprocessor wakeup + RTC_PERIPH ON
Replies: 1
Views: 179

ULP coprocessor wakeup + RTC_PERIPH ON

The Sleep Modes documentation notes: Revisions 0 and 1 of the ESP32 only support [ULP coprocessor wakeup] when RTC peripherals are not forced to be powered on (i.e. ESP_PD_DOMAIN_RTC_PERIPH should be set to ESP_PD_OPTION_AUTO). https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/syst...
by boarchuz
Thu Nov 28, 2019 10:49 pm
Forum: ESP32 Arduino
Topic: GRRRR How can I use ESP32 to SEND and RECEIVE GET Requests simultaneously?
Replies: 11
Views: 785

Re: GRRRR How can I use ESP32 to SEND and RECEIVE GET Requests simultaneously?

kermitfuckingfrog wrote:
Thu Nov 28, 2019 7:26 pm
My watchdog get's triggered
Have a read over the documentation here and you'll see what the problem is:
https://github.com/me-no-dev/ESPAsyncWebServer

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