Hello @ajb2k3

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

I found this:

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

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

@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

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

Hello,

I'm also trying to make the same RFID reader work with my ExtPort by using the port C and UART

But I cannot get any value from the reader.
Can somebody help me in this ?

Here are the details of my setup.

Thank you very much
Regards

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:

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

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:

Final diagram:

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

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

Best regards

Hi,

I'm using M5 scales kit for a pet dispenser project.

When I print the weight on the screen of my M5 core basic; it is not stable.
I mean that the reported weight is displaying changing values over time.
I reset the scales kit (so it shows "0") and I don't touch or move it for several minutes and I can see the weight value is changing over time.

What did I miss ?
At the moment I didn't put a cover plate on top of the scales kit. Can it be the reason ?

Thank you for your help.

Best regards

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:

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:

Best regards

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:

And here is the example UIFlow that works for me:

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