esp-01 with pn532 i2c V3
Posted: Wed Nov 06, 2019 12:05 pmHi so will the PN532 V3 work over i2c with the esp-01? or do I need to get the esp-12f and use SPI?
or
ESP8266 Community Forum
Open Community Forum for ESP8266, Come share Arduino and IoT (Internet of Things)
https://www.esp8266.com/
esp-01 with pn532 i2c V3
Page 1 of 1
Posted: Wed Nov 06, 2019 12:05 pmRe: esp-01 with pn532 i2c V3
Posted: Thu Nov 07, 2019 7:50 amYou can use the ESP-01 to talk I2C without problem (I used it once to drive the display of a YouTube counter), whether it will work with the PM532 is for you to find out, but I expect no problems. You've only got to make sure you use the correct pull-up resistors, for instance like this:
or
or
Re: esp-01 with pn532 i2c V3
Posted: Fri Nov 08, 2019 9:37 amso two 330 ohm resistors for the GPIO?
the resistors on your VCC are for your voltage divider and would I need those if I had a stable 3.3-volt power supply?
the resistors on your VCC are for your voltage divider and would I need those if I had a stable 3.3-volt power supply?