Search found 138 matches

by martinayotte
Fri Apr 03, 2020 2:05 pm
Forum: ESP32 IDF
Topic: Button counter with interrupt
Replies: 2
Views: 252

Re: Button counter with interrupt

Your while loop doesn't check buttonState anymore after entering the loop ...
You should do that instead :

Code: Select all

            while(gpio_get_level(GPIO_INPUT_IO_0) == 1) {
by martinayotte
Tue Jan 14, 2020 2:57 pm
Forum: General Discussion
Topic: 16 relays controlled by esp32 and mcp23017
Replies: 2
Views: 491

Re: 16 relays controlled by esp32 and mcp23017

Do you have some MOSFETs or any kind of drivers, such as ULN2803, between MCP23017 and the relays ?
Because MCP23017 output can't provide enough current (max 25mA) to drive relay's coils directly ...
by martinayotte
Tue Dec 24, 2019 2:37 pm
Forum: Hardware
Topic: ULN2003 Stepper Motor
Replies: 2
Views: 507

Re: ULN2003 Stepper Motor

ULN2003 isn't the best for that purpose, especially that saturation requires input level greater than 2.7V.
You're better using MOSFET with low Vgs, such AO3401, where saturation could be achieve with only 1.3V.
by martinayotte
Fri Dec 13, 2019 3:02 pm
Forum: General Discussion
Topic: ESP32 interface with I/O Expander
Replies: 4
Views: 539

Re: ESP32 interface with I/O Expander

Do you placed a PullUp on RES pin of the TCA6424 ?
by martinayotte
Tue Dec 10, 2019 8:18 pm
Forum: ESP32 Arduino
Topic: [SOLVED] How to send a signal for a set amount of time ?
Replies: 6
Views: 662

Re: How to send a signal for a set amount of time ?

GeorgeFlorian1 wrote:
Tue Dec 10, 2019 10:31 am
What do you think ?
You need another delay after bringing back the lines to HIGH ...
by martinayotte
Mon Nov 11, 2019 3:11 pm
Forum: ESP32 IDF
Topic: Simple Timer Interrupt Not Working
Replies: 8
Views: 710

Re: Simple Timer Interrupt Not Working

eowesi wrote:
Mon Nov 11, 2019 12:09 pm
The display shows "c : 0" continuously.
You need to have your declaration "uint32_t c = 0;" to be volatile, ie "volatile uint32_t c = 0;"
by martinayotte
Thu Nov 07, 2019 10:01 pm
Forum: Hardware
Topic: PCB power layout ESP32WROOM
Replies: 4
Views: 657

Re: PCB power layout ESP32WROOM

IBABBLED wrote:
Wed Nov 06, 2019 9:06 pm
1. What are the smallest acceptable footprints sizes for C1, C2, C3 and R1 (e.g. 0603, 0402)?
For R1/C2/C3, yes, it could be 0603 or 0402, but for C1, since it is 10uF, I doubt ...
by martinayotte
Mon Sep 02, 2019 1:55 pm
Forum: ESP32 Arduino
Topic: ESP32 Remote Control
Replies: 17
Views: 4088

Re: ESP32 Remote Control

schkillll wrote:
Mon Sep 02, 2019 1:26 pm
Is there any other way than port forwarding?
To expose expose internal ESP32 WebServer externally ?
No !
by martinayotte
Fri Aug 30, 2019 2:20 pm
Forum: ESP32 Arduino
Topic: ESP32 Remote Control
Replies: 17
Views: 4088

Re: ESP32 Remote Control

Of course the router need to be configured to provide proper port forwarding.
You've asked how to get ESP32 WebServer exposed, but now you are talking about MQTT, which is completely different thing ...

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