I have uno + sim800 shield + em506 stack together already finish the where it has sending sms, auto responder when texted, sending data to server.The code is working when I use serial monitor when running the script but when I use only the external power for arduino the POST method doesn't work but the sending sms and auto responder works fine. Anyone had this problem before ?
Show the sketch please.
And ensure you use CODE TAGS ( </> )
n3mub:
when I use only the external power for arduino
Which is?
Whandall:
Which is?
USB to DC 9V hook up to an power bank
Why don't you connect the powerbank directly?
It is connected directly
Then I do not understand "USB to DC 9V hook up to an power bank".
There is no 9V involved in USB or powerbanks normally.