Best posts made by falbriard

M5Stack Core2 and GPS Module (my solution with UIFlow)

I'm using a stackable GPS unit with external antenna. Under UIFLow I've configured it to TX=14 and RX=13 and its working.

In order to get decimal return values for location data, which I need to transport into a MQTT publisher protocol, I wrote a conversion function in a “blockly” execute statement interpreted as MicroPython. Yes, yet missing some support for Altitude. Ideas for improvement of the logic are welcome.

Hope this is helpful (see the code below):

# GPS location conversion 
# convert into decimal
def conversion(inp):
    minus = False
    parts = inp.split('.')
    ddmm = parts[0]
    ss = parts[1]
    last_char = ss[-1]
    if (last_char == 'W') or (last_char == 'S'):
        minus = True
        # remove last character 
        ss = ss[:-1]
    last_two_char = ddmm[-2:]
    mm = last_two_char
    if len(ddmm) == 3:
        dd = ddmm[:1]
    if len(ddmm) == 4:
        dd = ddmm[:2]        
    if len(ddmm) == 5:
        dd = ddmm[:3]
    if minus:  
        dd = int(dd) * -1  
    minf = float(mm + '.' + ss)
    secsmm = minf / 60
    # case South, or West invert 
    if minus: 
        deci = float(dd - secsmm)
    else:
        deci = float(dd + secsmm)
    
    return deci

I ‘m using the M5Stack GPS module with external antenna and Core2 module with an additional battery extension and base unit. The basic GPS function delivered by UIFlow are working OK, but there is a missing readout of the Altitude value. It also would be useful if UI could format the values from NMEA data and convert it into an all decimal notation. Is there any sample how to do this using a MicroPython extension code?

Re: [RFID2 unit not working with UIFlow 1.12.5 / Core2 Burn 1.9.8]
Meanwhile I've isolated the issue. The error cause was not the M5 RFID2 device, but it was the format of my RFID tags. In order to the reader/writer work properly, the tag format must be ISO 14443-3A Mifare Classic 1K. To validate the tag format I used the Android NFC Tools.