The side project of looking at 3G/4G modems has also started. This is going to be on one of those optional expansion slots to allow us to use different modems for different functions. I’m used to SIMCOM, but it seems their selection is getting complicated (particularly for 4G). I see the SIM5320A has 3G and GPS, which seems good but is quite dated now.
- SIM5320A:Dual-Band UMTS/HSDPA 850/1900MHz, Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz
- SIM5320(J)E:Dual-Band UMTS/HSDPA 900/2100MHz, Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz
- SIM5320J:Dual-Band UMTS/HSDPA 850(800)/2100MHz Quad-Band GSM/GPRS/EDGE 850/900/1800/1900MHz
It does have the CMUX, which is very nice (gives us four virtual ports over the single async port, so easier to deal with AT command control).
If anyone has any suggestions for the modem, it would be helpful. Something with GPS would be ideal.
Regards, Mark.