I’d be very interested in locating a source for an OEM device such as:
O ready-boxed unit containing a wireless module supporting open-AT and possibly embedded SIM.
O wide-input-range power supply 9-30V or so.
O IP-65 to 67 packaging.
O External RS232 or even RS485 serial port
O CE marked, and UL if possible.
Is there a good place to look for suppliers of ready-to-use units containing SW modems?