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    Don't know what to use

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    • J
      jerome83136
      last edited by

      Hi,

      I finally got the relay working with M5 Core Basic !
      I think my mistake was to power the relay with 5v rather than 3.3v

      Here is my wiring:

      0_1678303871852_e3effaca-5d50-4aad-8ac3-443c74b7346f-image.png

      And here is the example UIFlow that works for me:

      0_1678303823556_4a5396f9-008d-4831-9ef2-9a8450709bfe-image.png

      Now I need to find a way to power the M5 Core Basic by using a DC 12V --> USB 5V connector and connect it to the DC 12V power supply I already use.

      Next step will be the hardest: understanding how PaHub works to interconnect the M5 Core Basic with:

      • RFID reader
      • M5 Scales kit
      • M5 Ultrasonic Distance Unit

      I will report progress here

      Thank you again for your help

      Best regards

      1 Reply Last reply Reply Quote 0
      • J
        jerome83136
        last edited by jerome83136

        Hi all,

        Another report here.

        Almost everything is ready.
        I'm quite sure the RFID2 reader won't do the job because of its short reading range; let's try and improve if required.
        I will certainly have to give this reader a try. (already ordered)

        1 question I had while testing: TOF and RFID2 seems to need Ports A or E. But Port E never worked (the unit is seen as "not connected" by the Core); forcing me to use a PaHub which is a pity because I have plenty of available ports with the ExtPort extension.
        Someone able to help me understanding why ? (If I could use port E; I could completely remove the PaHub)

        Here is the current setup:

        0_1678322286834_643f4d48-949f-493f-a645-6ab5b9b233e5-image.png

        Last thing to do to complete the prototype: get a 12v --> 5V USB connector in order to power the M5 Core + 12v DC motor with a single source.

        Here is a simple UIFlow to check every component works correctly:
        0_1678322444056_88f378cd-ffb9-49e4-ae76-58ec1ab68f26-image.png

        Best regards

        1 Reply Last reply Reply Quote 1
        • J
          jerome83136
          last edited by jerome83136

          Hello all,

          Last part done (single power supply for M5 core + DC motor)
          I was also able to remove the PaHub by using the ExtPort (Port D). I had to change the dip switch value to:

          • Port D-1[2] = ON (to use GPIO22)
          • Port D-2[2] = ON (to use GPIO21)

          I then had to change the TOF module's port config in UIFlow to use the Port D:
          0_1678466335229_c91cfd3f-7455-44c5-bacd-6b80446df4c2-image.png

          Final diagram:
          0_1678466025476_23c67135-ad74-4585-9038-6379f178683c-image.png

          NB: DC(12v) to USB(5v) converter link

          Now let's get physcal parts printed and test it !

          Best regards

          1 Reply Last reply Reply Quote 1
          • ajb2k3A
            ajb2k3
            last edited by

            Cool and thanks for sharing your progress.
            When you get everything up and running, please create a build log on Hackster.io

            UIFlow, so easy an adult can learn it!
            If I don't know it, be patient!
            I've ether not learned it or am too drunk to remember it!
            Author of the WIP UIFlow Handbook!
            M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

            J 1 Reply Last reply Reply Quote 1
            • J
              jerome83136
              last edited by jerome83136

              Hi guys,

              New problem here: I'm unable to use this RFID reader from Seeed studio

              The reader is able to communicate by serial (9600 baudrate, 8 data bits, 1 stop bit, and no verify bit)

              I connected it with my Ext port Blue port PortC (stacked with my M5 Core Basic)

              • Reader Yellow wire (TX) --> Ext port (Port C) / PIN13
              • Reader White wire (RX) --> Ext port (Port C) / PIN14

              On UI Flow I tried this:

              0_1679067565637_9b0cde45-1a62-4fe4-866f-a0a6c3ccfc52-image.png

              When I put an RFID tag on the reader; a red led seems to indicate it detects the tag; but I get nothing printed on my M5 Core Basic screen.

              What did I wong ?

              Thank you for your help

              Best regards

              1 Reply Last reply Reply Quote 0
              • J
                jerome83136
                last edited by

                Hello,
                Anybody here to help me on this blocking point?
                Thank you
                Best regards

                1 Reply Last reply Reply Quote 0
                • J
                  jerome83136 @ajb2k3
                  last edited by

                  @ajb2k3 hello,
                  I would be really happy to share my project; but for this I will need some help on my last question on this topic 😉
                  Any suggestion to unblock me ?
                  Best regards

                  1 Reply Last reply Reply Quote 0
                  • ajb2k3A
                    ajb2k3
                    last edited by

                    Have you got a micropython library installed for the reader?
                    It looks like you set up the connection but you have yet to initialise the reader and tell it to start talking.

                    UIFlow, so easy an adult can learn it!
                    If I don't know it, be patient!
                    I've ether not learned it or am too drunk to remember it!
                    Author of the WIP UIFlow Handbook!
                    M5Black, Go, Stick, Core2, and so much more it cant be fit in here!

                    1 Reply Last reply Reply Quote 0
                    • J
                      jerome83136
                      last edited by

                      Hello,

                      Thank you for your feedback.

                      The code generated by the UIflow example from my last screenshot is the following:

                      from m5stack import *
                      from m5ui import *
                      from uiflow import *

                      setScreenColor(0x222222)

                      lcd.fill(0xffffff)
                      uart1 = machine.UART(1, tx=14, rx=13)
                      uart1.init(9600, bits=8, parity=None, stop=1)
                      while True:
                      if uart1.any():
                      lcd.print((uart1.read()).decode(), 0, 0, 0xff0000)
                      wait_ms(2)

                      Do I need to add something else to this code to receive any signal from the reader ?

                      Do tyou mean UIFlow requires additional libraries to be able to communicate over serial (UART) ?

                      Thank you for your help
                      Best regards

                      1 Reply Last reply Reply Quote 0
                      • J
                        jerome83136
                        last edited by

                        Hello @ajb2k3

                        I took a look on your UIFlow handbook for some examples on serial communication.

                        I found this:
                        0_1680074762436_101c0ef1-393b-4e13-9081-d0d4be3f153c-image.png

                        It seems the code is almost the same than the one generated for me by UIFlow.

                        The imported libraries are the same than the ones I have in my code:
                        from m5stack import
                        from m5ui import
                        from uiflow import

                        On the example provided by my reader's provider; they import this library: " #include <SoftwareSerial.h>"

                        https://wiki.seeedstudio.com/Grove-125KHz_RFID_Reader/#play-with-arduino

                        But I think this is the implémentation for Arduino and I guess the equivalent UIFlow libraries are loaded through this:
                        from m5stack import
                        from m5ui import
                        from uiflow import

                        Do I miss something ?

                        On my side I think the reader works because when I bring a RFID tag close to it; the status led of the reader lights up.
                        But I still receive nothing on the M5 core RX PIN

                        Thank you for your help
                        Best regards

                        1 Reply Last reply Reply Quote 0
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