How to use UART?

[bmarkus]

How can I connect an external device (GPS receiver) to LoPy and setup, configure and read in program?

[jobbyworld]

You need last firmware

import os
os.uname()
(sysname='LoPy', nodename='LoPy', release='0.9.1.b1', version='a78d0fa on 2016-10-21', machine='LoPy with ESP32')

from machine import UART
com = UART(1,pins=("G23","G24")) #USE P2 P3 , keep UART 0 for usb connection 
com.readline()
b'$GPVTG,318.32,T,,M,0.03,N,0.06,K,N*3C\r\n'
```

[LoneTech]

Tip: for code formatting, use four spaces indentation. The REPL prompt >>> will otherwise make a nested folding quote block.

import os
os.uname()
(sysname='LoPy', nodename='LoPy', release='0.9.1.b1', version='a78d0fa on 2016-10-21', machine='LoPy with ESP32')


from machine import UART
com = UART(1,pins=("G23","G24")) #USE P2 P3 , keep UART 0 for usb connection
com.readline()
b'$GPVTG,318.32,T,,M,0.03,N,0.06,K,N*3C\r\n'

[jobbyworld]

@LoneTech Ok thanks

[gas]

Hi

did someone managed to make it work with an external GPS module
I have the data coming in but when i tried to use the lib micrpyGPS it failed since it wasn't able to allocat memory
so before starting re writing everything to convert the sentance if someone had any sketchup

>>> from micropyGPS import MicropyGPS
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
MemoryError: memory allocation failed, allocating 136 bytes


>>> com = UART(1,pins=("P3","P4"))
>>> com.readline()
b'$GPVTG,,,,,,,,,N*30\r\n'
>>> com.readline()
b'$GPG$GPRMC,12$GPVTG,,,,,,,,,N*30\r\n'
>>> com.readline()
b'$GPGGA,123243.00,,,,,0,0$GPRMC,123244.00,V,,,,,,,210217,,,N*78\r\n'