Sending ctrl+z using serial monitor +7020g

Using Arduino Project Guidance
#1

Hi,

I am using Arduino UNO in combination with M5 STACK + SIM 7020G(NB IOT). I am trying to send a message using Arduino serial monitor and have a trouble in ending the message. Ctrl+z is not working on serial monitor. I tried ending the messages in several ways but nothing works except using "" and it returns error. In the below example after entering hello, i tried couple of times pressing ctrl+z or esc, nothing works.
AT+CMGS="+467000000"

hello.

ERROR
at

OK

br,
anvup

#2

show us your code…

#3

@anvup1, your topic has been moved to a more suitable location on the forum.

Maybe there is some information in arduino control z - Google Search

#4

As i am sending AT commands individually on serial monitor i dont need any code, dumping a sample or demo code is enough.

#5

If you’re not using any code, why bother using Serial Monitor ?

It’s a very restrictive imitation of a terminal program…

Try PuTTY or another ‘real’ terminal package.

#6

i tried putty as well and still have the same issue. upon doing ctrl+z, i get and error instead of confirmation.

#7

It’s beginning to sound like your modem isn’t connected to the network.

Try setting up to receive messages
AT+CNMI=2, 2

Then send a message to the modem…
You should see incoming notifications..

Then try sending a text followed as expected with CTRL-Z (0x1A or 26 decimal)

There’s a chance if you can receive, but not send, the SIM plan has no credit.

#8

i got the response ok upon sending
AT+CNMI=2,2
But after sending the message and entering ctrl+z i got the reply "error"
i am using post paid does it have any impact? and when i use at+cops=? i got reply error instead of service provider name

#9

Did I suggest sending ctrl-z ?
I suggested send an sms (from your phone) to see if it receives incoming messages.

#10

OK. I tried to send the message and not received anything on the modem.

#11

ok, that suggests the modem isn’t online…

Just while we’re here…
When you apply power to the modem, do you get any startup text from the modem?

I assume your SIM doesn’t have SIM PIN enabled… ?

How about typing
ATI carriage return ?
AT+CCINFO carriage return ?

#12

The response from putty is as follows.
ATI
SIM7020G R1910
OK
AT+CCINFO
ERROR

But i also got this,

AT+COPS=?
+COPS: (3,"TELIA MOBILE","TELIA","24001",9),,(0-4),(0-2)

OK

#13

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