- Wed Nov 06, 2019 12:05 pm
#84447
Hi so will the PN532 V3 work over i2c with the esp-01? or do I need to get the esp-12f and use SPI?
- Thu Nov 07, 2019 7:50 am
#84457
You 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
Assumption is the mother of all f*ckups; I should know: I've been assuming a lot.
When you're new, don't start with a separate ESP (ESP-01 to ESP-14) module.
Get yourself a proper development board: NodeMCU - WeMos D1 - WeMos (UNO form factor) - Witty Board
ESP power requirements are 3.3V±10%@350mA
The ESP8266 IS NOT 5V tolerant on ANY pin (see item 5.14 on page 25 of the FAQ)
When you're new, don't start with a separate ESP (ESP-01 to ESP-14) module.
Get yourself a proper development board: NodeMCU - WeMos D1 - WeMos (UNO form factor) - Witty Board
ESP power requirements are 3.3V±10%@350mA
The ESP8266 IS NOT 5V tolerant on ANY pin (see item 5.14 on page 25 of the FAQ)
- Fri Nov 08, 2019 9:37 am
#84480
so 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?
