Metro ESP32-S2 board.TX and board.RX default pins

Please tell us which board you are using.
For CircuitPython issues, ask in the Adafruit CircuitPython forum.

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
muttstang
 
Posts: 86
Joined: Mon May 10, 2021 3:24 pm

Metro ESP32-S2 board.TX and board.RX default pins

Post by muttstang »

So I'm trying to communicate with my ultimate gps logger shield using the Metro ESP32-S2 and the serial comms is just on the "Waiting for fix..." message. I was wondering what the default board.TX and board.RX pins are on this board and if those are incorrect, would I even get to this "Waiting for fix..." message in the serial window portion on Mu. Not sure if I just need to bring this thing outside or if I need to put something else for the inputs in the line below.

Code: Select all

uart = busio.UART(board.TX, board.RX, baudrate=9600, timeout=10)
I'm using the code from the ultimate GPS board.

Code: Select all

# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

# Simple GPS module demonstration.
# Will wait for a fix and print a message every second with the current location
# and other details.
import time
import board
import busio

import adafruit_gps

# Create a serial connection for the GPS connection using default speed and
# a slightly higher timeout (GPS modules typically update once a second).
# These are the defaults you should use for the GPS FeatherWing.
# For other boards set RX = GPS module TX, and TX = GPS module RX pins.
uart = busio.UART(board.TX, board.RX, baudrate=9600, timeout=10)

# for a computer, use the pyserial library for uart access
# import serial
# uart = serial.Serial("/dev/ttyUSB0", baudrate=9600, timeout=10)

# If using I2C, we'll create an I2C interface to talk to using default pins
# i2c = board.I2C()

# Create a GPS module instance.
gps = adafruit_gps.GPS(uart, debug=False)  # Use UART/pyserial
# gps = adafruit_gps.GPS_GtopI2C(i2c, debug=False)  # Use I2C interface

# Initialize the GPS module by changing what data it sends and at what rate.
# These are NMEA extensions for PMTK_314_SET_NMEA_OUTPUT and
# PMTK_220_SET_NMEA_UPDATERATE but you can send anything from here to adjust
# the GPS module behavior:
#   https://cdn-shop.adafruit.com/datasheets/PMTK_A11.pdf

# Turn on the basic GGA and RMC info (what you typically want)
gps.send_command(b"PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0")
# Turn on just minimum info (RMC only, location):
# gps.send_command(b'PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')
# Turn off everything:
# gps.send_command(b'PMTK314,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0')
# Turn on everything (not all of it is parsed!)
# gps.send_command(b'PMTK314,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0')

# Set update rate to once a second (1hz) which is what you typically want.
gps.send_command(b"PMTK220,1000")
# Or decrease to once every two seconds by doubling the millisecond value.
# Be sure to also increase your UART timeout above!
# gps.send_command(b'PMTK220,2000')
# You can also speed up the rate, but don't go too fast or else you can lose
# data during parsing.  This would be twice a second (2hz, 500ms delay):
# gps.send_command(b'PMTK220,500')

# Main loop runs forever printing the location, etc. every second.
last_print = time.monotonic()
while True:
    # Make sure to call gps.update() every loop iteration and at least twice
    # as fast as data comes from the GPS unit (usually every second).
    # This returns a bool that's true if it parsed new data (you can ignore it
    # though if you don't care and instead look at the has_fix property).
    gps.update()
    # Every second print out current location details if there's a fix.
    current = time.monotonic()
    if current - last_print >= 1.0:
        last_print = current
        if not gps.has_fix:
            # Try again if we don't have a fix yet.
            print("Waiting for fix...")
            continue
        # We have a fix! (gps.has_fix is true)
        # Print out details about the fix like location, date, etc.
        print("=" * 40)  # Print a separator line.
        print(
            "Fix timestamp: {}/{}/{} {:02}:{:02}:{:02}".format(
                gps.timestamp_utc.tm_mon,  # Grab parts of the time from the
                gps.timestamp_utc.tm_mday,  # struct_time object that holds
                gps.timestamp_utc.tm_year,  # the fix time.  Note you might
                gps.timestamp_utc.tm_hour,  # not get all data like year, day,
                gps.timestamp_utc.tm_min,  # month!
                gps.timestamp_utc.tm_sec,
            )
        )
        print("Latitude: {0:.6f} degrees".format(gps.latitude))
        print("Longitude: {0:.6f} degrees".format(gps.longitude))
        print("Fix quality: {}".format(gps.fix_quality))
        # Some attributes beyond latitude, longitude and timestamp are optional
        # and might not be present.  Check if they're None before trying to use!
        if gps.satellites is not None:
            print("# satellites: {}".format(gps.satellites))
        if gps.altitude_m is not None:
            print("Altitude: {} meters".format(gps.altitude_m))
        if gps.speed_knots is not None:
            print("Speed: {} knots".format(gps.speed_knots))
        if gps.track_angle_deg is not None:
            print("Track angle: {} degrees".format(gps.track_angle_deg))
        if gps.horizontal_dilution is not None:
            print("Horizontal dilution: {}".format(gps.horizontal_dilution))
        if gps.height_geoid is not None:
            print("Height geo ID: {} meters".format(gps.height_geoid))

User avatar
muttstang
 
Posts: 86
Joined: Mon May 10, 2021 3:24 pm

Re: Metro ESP32-S2 board.TX and board.RX default pins

Post by muttstang »

Yep, it was a silly question. I figured out how to put the pins properly into the command. board.IO12 and board.IO13 got it working..

Locked
Please be positive and constructive with your questions and comments.

Return to “Metro, Metro Express, and Grand Central Boards”