I am working on GSM SIM800L along with Teensy 3.2 microcontroller. I have done the connections and I can see the Netlight LED blinking. The rate at which it is blinking is quite fast and I think that it is not registered to the network.
- I cant make calls to the number. It says not reachable.
- Led is continuously blinking, so I think it is not a power issue.
- I have established connection between the GSM and controller. I can see the proper response of basic AT commands in the Arduino Serial Monitor.
- I am getting Response ‘Error’ on sending SIM related AT commands.
Also, I am working on a SIM which has a PIN lock. Is it due to this that my SIM is not getting registered to the network?
How can I fix this?
Thanks in advance!!