Hi, I am trying to connect Blynk using SIM800A GSM module and Arduino Nano.
When I connect it to my Arduino nano the module is connecting to the network but failing to connect GPRS(Attach).
I had to fix your post as you had not properly formatted your posted code, as required in the Welcome Topic and in the directions you needed to delete when posting your topic.
Thank you for Fixing the format of code.
I will check with 9600 baud rate but it is finding network also connecting to network with baud rate of 38400.
The problem is in attaching the GPRS only.
Hard to tell… apn is correct? User/pass usually not needed but check your case. The same sim card works fine with GPRS mode on another modem/cell phone? (check modem’s network settings) The 38400 works with SSerial, but on my experience it is “a roof” for Atmega 328 (Arduino). One step down should be safer.
One USART and too slow for fast SSerial. You can try with more capable MEGA and it’s hardware USART’s. But I was using GSM long time ago with SS baud rate 33600 and it was fine. My recent “design” was using hardware serial though.
All that said, I think your problem is not SS related.
I am asking Blynk Library Version…
I have tried Blynk v0.5.4 and v0.6.1 with Arduino Nano Both are not working…
and tiny GSM++ library v0.6.2 , which is not working in my case.
Have you tried turning on all your debugging?
Please post your serial debugging (set up in IDE)
Lets have a look at those LWIP and IP client debugs.
In my case Vodacom SA issue above, I determinded that it was my Cellular operator dropping PCH IP packets on my HTTP login process.
I just got another providers SIM and all good.