Comms via UART between RP2040 and ESP

[alexphobby]

Hello T-PicoC3 Tutorial for comms between internal RP2040 and ESP

RP2040(sender):

from machine import UART, Pin import time time.sleep(3) uart = UART(1, baudrate=115200 , tx=Pin(8), rx=Pin(9), cts=Pin(10), rts=Pin(11)) uart.write('ATE0\r\n') led = machine.Pin(25,Pin.OUT) #on board LED

while True: try: led.toggle() uart.write('TEST\r\n') print("uart OK") except: print("err") time.sleep(1)

ESP32(receier):

from machine import UART uart = UART(1, baudrate=115000 , tx=7, rx=6, cts=5, rts=4) uart.init(115000, bits=8, parity=None, stop=1) uart.any() # >0 means data received uart.read() #data being received

So, one use case scenario is to use ESP32 to send and receive messages from a MQ (HiveMQ tested by me).

Have fun with this nice board!

[maxun]

Thank you Alex,

With your example, I was able to do something similar between RP2040 and ESP with arduino IDE.

If it can help someone else:

RP2040: void setup() { Serial2.setTX(8); Serial2.setRX(9); Serial2.begin(115200); }

ESP32: void setup() { Serial0.begin(115200); Serial0.setPins(6, 7, 5, 4); }

[Arquedy]

you two helped me a lot, i really appreciate it