- Tue Feb 23, 2016 10:00 am
#41724
Of course GPIO0/GPIO2 can be read using digitalRead(), as long as those pins are HIGH during power-up and/or reset for getting into proper boot mode.
Moderator: igrr
- Thu May 19, 2016 6:41 am
#47647
Yes you can set I/O state for GPIO-2, which can be made high low through GPIO-0. You can drive relay, LED by connecting it on GPIO-2.
samialfarra wrote:Thank you Ray . I want to know can read digital pin in ESP 01 that have only gpio 0 and gpio 2 like digital pin in arduino
Yes you can set I/O state for GPIO-2, which can be made high low through GPIO-0. You can drive relay, LED by connecting it on GPIO-2.
Cheers,
PB
PB
- Thu May 19, 2016 9:11 am
#47654
Hi, you can also use GPIO 1 & 3 (by default Tx & Rx). I quite often use GPIO 3 if I need an extra pin or if the pullups on GPIOs 0 & 2 make things hard work. You can still debug with just Tx.
The functions are about half way down this page
wiki/doku.php?id=esp8266_gpio_pin_allocations
The functions are about half way down this page
wiki/doku.php?id=esp8266_gpio_pin_allocations
