Is this the thread in question?
I’m programming a small software for Wavecom fastrack M1306B GSM-modem and i’m trying to make the modem forward text messages to a specific number, no matter how many messages the modem receives or when it receives them. The main problem is that the modem sends error messages (+CMS ERROR: 515 or +CMS ERROR: 512) when sending more than two messages simultaneously or with short intervals. For example, if i send 5 messages to the modem one after the other or simultaneosly, only 4 or less messages …