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by WiFive
Thu Jul 19, 2018 6:08 am
Forum: Hardware
Topic: Question about UART Downloading
Replies: 1
Views: 30

Re: Question about UART Downloading

Io2 has internal pulldown so as long as you do not pull it or drive it high it will be read as low
by WiFive
Wed Jul 18, 2018 8:20 pm
Forum: ESP32 Arduino
Topic: ESP32 GPIO 34/ GPIO35 softwareserial problem.
Replies: 2
Views: 89

Re: ESP32 GPIO 34/ GPIO35 softwareserial problem.

martinayotte wrote:GPIO34 to GPIO39 are "Input Only" ...


He said RX
by WiFive
Wed Jul 18, 2018 7:54 pm
Forum: General Discussion
Topic: ESP32 ISR and Optocoupler Double Interrupt (Spurious?)
Replies: 8
Views: 194

Re: ESP32 ISR and Optocoupler Double Interrupt (Spurious?)

When you have a slow rise time noise is going to be a bigger factor. If you are using an open collector optocoupler and not a logic output optocoupler you need a strong pull-up to have a fast rise time.
by WiFive
Tue Jul 17, 2018 7:26 pm
Forum: General Discussion
Topic: ESP32 ISR and Optocoupler Double Interrupt (Spurious?)
Replies: 8
Views: 194

Re: ESP32 ISR and Optocoupler Double Interrupt (Spurious?)

10% error due to noise sounds more like a hardware design issue than a bug. In your photo your test leads are huge antennas. You could try one of the following workarounds 1. Ignore second interrupt within x time since previous interrupt based on known signal parameters 2. Use low level interrupt, s...
by WiFive
Tue Jul 17, 2018 3:08 am
Forum: Report Bugs
Topic: Always get 0 pins as ext1 wakeup source from deep sleep.
Replies: 4
Views: 118

Re: Always get 0 pins as ext1 wakeup source from deep sleep.

Since they all have to be low to wake up do you mean the last pin to go low? I don't think that would be stored in any registers.
by WiFive
Mon Jul 16, 2018 5:08 pm
Forum: Hardware
Topic: How to change device name connected to WiFi
Replies: 1
Views: 70

Re: How to change device name connected to WiFi

Not a hardware question

tcpip_adapter_set_hostname
by WiFive
Mon Jul 16, 2018 2:53 am
Forum: Report Bugs
Topic: Always get 0 pins as ext1 wakeup source from deep sleep.
Replies: 4
Views: 118

Re: Always get 0 from as ext1 wakeup source from deep sleep.

If the mode is ESP_EXT1_WAKEUP_ALL_LOW then don't you already know that they are ALL LOW?
by WiFive
Sat Jul 14, 2018 3:51 pm
Forum: General Discussion
Topic: ROM, RAM and flash difference and usage
Replies: 4
Views: 111

Re: ROM, RAM and flash difference and usage

ROM stands for Read Only Memory so yes you need flash. D0WD uses external flash.

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