Craig, We plan to use SIM7600G R2 chip. That is very similar to SIM5360 we currently use, but is multi-band and can cover both EU and US frequencies with one module. It is more expensive than the band-specific SIM7600A and SIM7600E, but certification costs for one single product (vs two) will be much cheaper, and logistics simpler for everyone. I think the current modem board should already support SIM7600 modules. The sample I have is the same board design. The issue is primarily firmware support. The for-v3.3 branch had so many problems with esp32 firmware lwip library messing up. But time is short, so I am thinking of just applying this as a small extension to the existing master firmware branch (adding a quick check for modem type, and then hard-coded support where necessary to cope with modem type differences). Single Wire CAN is possible using that board design from Marko Juhanne, I think? If there is a requirement, we could make an optional expansion board for that (in a similar way to what we did for K-line). Regards, Mark.
On 17 Aug 2021, at 1:59 PM, Craig Leres <leres@xse.com> wrote:
On 8/16/21 10:30 PM, Mark Webb-Johnson wrote:
Is there anything else required for this update?
I'd like to volunteer for hardware testing of the SIM7600 capable version of the modem board. I have a US version of the SIM7600 module I can solder onto a bare board (and can easily deal with board-to-board connectors and support components).
Will there be any effort to support single wire can? I know you can use a 2-wire can to communicate on a single wire bus but there is the question about being able to wake up the vehicle if the can chip is not the dedicated single wire version?
(The beefed up micro usb connector sounds great)
Craig