I have gprs shield 2.0 that is working with teensyduino, apparently after some time the gprs shield stops responding, trying to do a software reset doesn’t appear to work (it wont power down/up the shield), only if I manually press the reset button it shuts down (and after that my software power on works).
this is my software power on code:
I am 100% sure that the teensy is not the problem here as I checked the D9 voltage, before the modem stops responding this shut off/on code works perfectly.
the usage of this modem is as a tcp constant connection with the following at commands:
AT+csclk=1 (I pull the dts pin when I want to send at commands as the modem is usually in sleep mode.