Have got a Sim900 module working well sending out a sms alert message ; its using a Tesco(uk) pay as you go sim card and controlled by an Arduino.
Its just got one little problem that I was hoping could be overcome, but after looking at the Sim900 AT command set I''m not sure it can.
At the moment, when sending out the alert I am also sending the number of messages sent since the last top up.
What would be better would be if I could use the AT commands to read a register that indicates the prepaid value is now low ; the provider puts out a verbal message to this effect, but wondered if that in any way changed any AT registers ?
Its just got one little problem that I was hoping could be overcome, but after looking at the Sim900 AT command set I''m not sure it can.
At the moment, when sending out the alert I am also sending the number of messages sent since the last top up.
What would be better would be if I could use the AT commands to read a register that indicates the prepaid value is now low ; the provider puts out a verbal message to this effect, but wondered if that in any way changed any AT registers ?