at+cipstart alwys get error with som800l


#1

Hello

i have a som800l modem, i always get error when trying to send via tcp, like:
at+cipstart=0,“TCP”,“105.107.131.7”,“747”
at+cipstart=“TCP”,“105.107.0.117”,“21”
AT+CIPSTART=“TCP”,“www.google.com”,80

the connection is normally open (with: at+ciicr) and the modem keeps flashing.


#2

Can you please elaborate? When it is giving error exactly?
How is it flashing at what rate?


#3


when i try sending via TCP i get the error
the module keeps flashing quickly after i send this: at+ciicr (it flashes 3 or 4 times in 1 second)


#4


#5

image
and i don’t know why the serial monitor doesn’t show the commands correctly sometimes


#6

This is strange. It should work.
I normally check IP address to be non zero by sending AT+CIFSR before sending AT+CIPSTART.