[Ovmsdev] OVMS v3 First Board Layout

Mark Webb-Johnson mark at webb-johnson.net
Mon May 8 14:42:34 HKT 2017


Is that ‘prime time’ already? I thought that wasn’t gonna be ready for another year or so (on a large scale, globally).

There is a SIMCOM module for LZTE-M (SIM7000C), with GNSS (GPS) and 2G but no 3G, but that is really new.

My concern with LTE is that there are still lots of areas with no 4G coverage, so fallback to 3G seems necessary.


> On 8 May 2017, at 2:18 PM, Dominik Westner <me at nikwest.de> wrote:
> Isn't LTE-M the way to go? 
> Something like the sequans monarch?
> http://www.sequans.com/products-solutions/streamlitelte/monarch-lte-platform/ <http://www.sequans.com/products-solutions/streamlitelte/monarch-lte-platform/>
> On 8. May 2017, at 07:41, Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>> wrote:
>> 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.
>> <OVMS_V3_Schematic_CN_20170503.pdf>
>> <OVMS_V3_Layout_CN_20170508.pdf>
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