NodeMCU 1.0 + RC522 + Nextion 2.4"
Posted: Wed Oct 19, 2016 5:09 pm
Hello friends I'm new to developing with esp8266, I'm trying to connect both an RFID reader rc522 and screen nextion 2.4 "in a NodeMCU 1.0, using arduino IDE v 1.6.11 to read an RFID tag and display the UID in Nextion 2.4 screen ".
I managed to connect and work with each separately, but I can not make them work together.
when the connections operate separately in NodeMCU v 1.0 are the following:
Nextion 2.4 "||| MCU Node 1.0
5V-------------- 5V
RX ------------ (D7) - GPIO13 - RXD2 - HMOSI
TX ------------ (D8) - GPIO15 - TXD2 - HCS
GND ----------GND
RC522 ||| MCU Node 1.0
3.3V------ 3.3V
RST ------ (D2) - GPIO4
GND------- GND
IRQ -----
MISO -------(D6) - GPIO12 - HMISO
MOSI -------(D7) - GPIO13 - RXD2 - HMOSI
SCK --------(D5) - GPIO14 - HSCLK
SS ----------(D4) - GPIO2 - TXD1
Both devices need to use the pin D7 (RXD2), I would like to use both at the same time, I read that I use UART but do not understand how to apply.
any help is welcome
thank you very much
I managed to connect and work with each separately, but I can not make them work together.
when the connections operate separately in NodeMCU v 1.0 are the following:
Nextion 2.4 "||| MCU Node 1.0
5V-------------- 5V
RX ------------ (D7) - GPIO13 - RXD2 - HMOSI
TX ------------ (D8) - GPIO15 - TXD2 - HCS
GND ----------GND
RC522 ||| MCU Node 1.0
3.3V------ 3.3V
RST ------ (D2) - GPIO4
GND------- GND
IRQ -----
MISO -------(D6) - GPIO12 - HMISO
MOSI -------(D7) - GPIO13 - RXD2 - HMOSI
SCK --------(D5) - GPIO14 - HSCLK
SS ----------(D4) - GPIO2 - TXD1
Both devices need to use the pin D7 (RXD2), I would like to use both at the same time, I read that I use UART but do not understand how to apply.
any help is welcome
thank you very much