I am trying to used the LTE-M Network with fipy and VASANTA(Mexican Network), using the this code to set the clock (RTC), but I don´t get it,I only get dots appears, I tried to use different NTP servers but it don´t change.
server 1.mx.pool.ntp.org
server 3.north-america.pool.ntp.org
server 2.north-america.pool.ntp.org
us.pool.ntp.org
Code:
import time
from machine import RTC
from network import LTE
NTP_SERVER = "mx.pool.ntp.org"
# Need to use global variables.
# If in each function you delare a new reference, functionality is broken
lte = LTE()
rtc = RTC()
# Returns a network.LTE object with an active Internet connection.
def getLTE():
# If already used, the lte device will have an active connection.
# If not, need to set up a new connection.
if lte.isconnected():
return lte
# Modem does not connect successfully without first being reset.
print("Resetting LTE modem ... ", end='')
lte.send_at_cmd('AT^RESET')
print("OK")
time.sleep(1)
# While the configuration of the CGDCONT register survives resets,
# the other configurations don't. So just set them all up every time.
print("Configuring LTE ", end='')
lte.send_at_cmd('AT+CGDCONT=1,"IP","internet.vasanta.com"')
print(".", end='')
lte.send_at_cmd('AT!="RRC::addscanfreq band=28 dl-earfcn=9410"')
print(".", end='')
lte.send_at_cmd('AT+CFUN=1')
print(" OK")
# If correctly configured for carrier network, attach() should succeed.
if not lte.isattached():
print("Attaching to LTE network ", end='')
lte.attach()
while(True):
if lte.isattached():
print(" OK")
break
print('.', end='')
time.sleep(1)
# Once attached, connect() should succeed.
if not lte.isconnected():
print("Connecting on LTE network ", end='')
lte.connect()
while(True):
if lte.isconnected():
print(" OK")
break
print('.', end='')
time.sleep(1)
# Once connect() succeeds, any call requiring Internet access will
# use the active LTE connection.
return lte
# Clean disconnection of the LTE network is required for future
# successful connections without a complete power cycle between.
def endLTE():
print("Disonnecting LTE ... ", end='')
lte.disconnect()
print("OK")
time.sleep(1)
print("Detaching LTE ... ", end='')
lte.dettach()
print("OK")
# Sets the internal real-time clock.
# Needs LTE for Internet access.
def setRTC():
# Ensures LTE session is connected before attempting NTP sync.
lte = getLTE()
print("Updating RTC from {} ".format(NTP_SERVER), end='')
rtc.ntp_sync(NTP_SERVER)
while not rtc.synced():
print('.', end='')
time.sleep(1)
print(' OK')
# Only returns an RTC object that has already been synchronised with an NTP server.
def getRTC():
if not rtc.synced():
setRTC()
return rtc
# Program starts here.
try:
print("Initially, the RTC is {}".format("set" if rtc.synced() else "unset"))
rtc = getRTC()
while(True):
print("RTC is {}".format(rtc.now() if rtc.synced() else "unset"))
time.sleep(5)
except Exception:
pass # do nothing on error<
finally:
endLTE()
