As the title says, I have a CR300 datalogger connected to a Sierra GL7600 GSM modem over RS232. The datalogger is set to measure every 10 minutes and transmit every 20 minutes. It works perfectly, when the datalogger is connected over USB to my computer and I have Terminal Emulator open with Serial Passthrough.
However, when my computer isn't connected, it only transmits successfully every 6-10th time?
I initialize the communication to the modem using SerialOpen with AllowSleep absent and RS232 Always On set to true.
I am unsure if it's related to timing, powersave or something third?
All the best,