I am trying to interface my MSP430FR5969 with a sim800l gsm. The following AT commands are sent to the gsm through the Serial1 UART (the responses are in blue): AT AT OK AT+COPS? +CO AT+CBC AT+CBC +CBC: The response i expect for AT+CBC is the strength of the battery in the format: +CBC: 0,00,0000 where the zeroes are replaced with the data. The AT+COPS? command should return a long string. It seems to me that not all of the message is making it from the gsm module. I found this exert for the arduino board on a guide for this gsm: Could this issue also apply to the MSP430? If so then how could I increase the size of the serial1? Or am i thinking this wrong? Any help is appreciated.