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    M5Dial UART Write not sending data

    UiFlow 2.0
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    • X
      xbr11332003
      last edited by

      The following M5Dial/UIFlow 2.0 code is able to receive data from Arduino Uno r4 wifi, but i cannot get data to Arduino. Using basic example Arduino code that works on other devices. Am i missing something? Tried every write command in UART list.

      import os, sys, io
      import M5
      from M5 import *
      from hardware import *
      
      
      
      label0 = None
      label1 = None
      label2 = None
      rotary = None
      uart1 = None
      
      
      def btnA_wasClicked_event(state):
        global label0, label1, label2, rotary, uart1
        rotary.reset_rotary_value()
        label0.setText(str(rotary.get_rotary_value()))
        label1.setText(str(rotary.get_rotary_value()))
        print(uart1.read(1)[0])
        uart1.write(bytes([1]))
      
      
      def btnA_wasHold_event(state):
        global label0, label1, label2, rotary, uart1
        label1.setText(str('hold'))
        label2.setText(str('Label'))
      
      
      def setup():
        global label0, label1, label2, rotary, uart1
      
        M5.begin()
        Widgets.fillScreen(0x222222)
        label0 = Widgets.Label("0", 96, 80, 1.0, 0xffa000, 0x222222, Widgets.FONTS.DejaVu72)
        label1 = Widgets.Label("label1", 88, 158, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu18)
        label2 = Widgets.Label("label2", -21, 114, 1.0, 0xffffff, 0x222222, Widgets.FONTS.DejaVu9)
      
        BtnA.setCallback(type=BtnA.CB_TYPE.WAS_CLICKED, cb=btnA_wasClicked_event)
        BtnA.setCallback(type=BtnA.CB_TYPE.WAS_HOLD, cb=btnA_wasHold_event)
      
        label1.setColor(0xcc33cc, 0x33ff33)
        rotary = Rotary()
        uart1 = UART(1, baudrate=9600, bits=8, parity=None, stop=1, tx=13, rx=15, txbuf=256, rxbuf=256, timeout=0, timeout_char=0, invert=0, flow=0)
      
      
      def loop():
        global label0, label1, label2, rotary, uart1
        M5.update()
        if rotary.get_rotary_status():
          label0.setText(str(rotary.get_rotary_value()))
      
      
      if __name__ == '__main__':
        try:
          setup()
          while True:
            loop()
        except (Exception, KeyboardInterrupt) as e:
          try:
            from utility import print_error_msg
            print_error_msg(e)
          except ImportError:
            print("please update to latest firmware")
      

      Arduino Code:

      int incomingByte = 0; // for incoming serial data
      
      void setup() {
        Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
      Serial1.begin(9600);
      }
      
      void loop() {
        // reply only when you receive data:
        if (Serial1.available() > 0) {
          // read the incoming byte:
          incomingByte = Serial.read();
      
          // say what you got:
          Serial1.print("I received: ");
          Serial1.println(incomingByte, DEC);
        }
      }
      
      X 1 Reply Last reply Reply Quote 0
      • X
        xbr11332003 @xbr11332003
        last edited by xbr11332003

        @xbr11332003
        Tried every UART write command and arduino is not receiving data.
        Serial monitor on Arduino prints -1. Again, I can send data to m5dial but arduino does not receive. Other arduino boards work flawlessly. Please help felix.

        felmueF 1 Reply Last reply Reply Quote 0
        • felmueF
          felmue @xbr11332003
          last edited by

          Hello @xbr11332003

          have you tried to send the data with trailing CR LF? E.g. uart1.write('hallo\r\n')? Works for me.

          Thanks
          Felix

          GPIO translation table M5Stack / M5Core2
          Information about various M5Stack products.
          Code examples

          1 Reply Last reply Reply Quote 0
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