Hello,
I’d like to use de CMUX mode in the EG21-G and EC21-E modems but I couldn’t find any information about that. I know the AT+CMUX and send some commands to the modules but I got error. These commands are not supported by them? Please, any informaticon could be useful.
Thanks.
[2025-03-11_11:16:55:194]AT
[2025-03-11_11:16:55:194]OK
[2025-03-11_11:17:29:710]ATI
[2025-03-11_11:17:29:710]Quectel
[2025-03-11_11:17:29:710]EC21
[2025-03-11_11:17:29:710]Revision: EC21EFAR06A04M4G
[2025-03-11_11:17:29:710]OK
[2025-03-11_11:17:41:740]AT+QGMR
[2025-03-11_11:17:41:742]EC21EFAR06A04M4G_01.004.01.004
[2025-03-11_11:17:41:742]OK
[2025-03-11_11:17:52:996]AT+CMUX=?
[2025-03-11_11:17:52:996]+CMUX: (0),(0-2),(1-7),(1-32768),(1-255),(0-100),(2-255),(1-255),(1-7)
[2025-03-11_11:17:52:996]OK
[2025-03-11_11:17:57:375]AT+CMUX?
[2025-03-11_11:17:57:375]+CMUX: 0,0,0,0,0,0,0,0,0
[2025-03-11_11:17:57:375]OK
[2025-03-11_11:18:03:816]AT+CMUX=0,0,5,512,10,30,5,10,1
[2025-03-11_11:18:03:816]+CME ERROR: 3
