The SIM900 module I have actually does not have a reset pin unfortunately. Also, the SIM800 is said to have a lower power consumption. We just bought a newer SIM800 we are going to try when it comes in - we read something about the SIM800 wanting 2.8V on the RX side but the new one we bought said it has level shifting circuitry to support 2.8-5V logic. I'll come back here with my findings from the newer SIM800 when it comes in.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The SIM900 module I have actually does not have a reset pin unfortunately. Also, the SIM800 is said to have a lower power consumption. We just bought a newer SIM800 we are going to try when it comes in - we read something about the SIM800 wanting 2.8V on the RX side but the new one we bought said it has level shifting circuitry to support 2.8-5V logic. I'll come back here with my findings from the newer SIM800 when it comes in.