Example GSM Modem

[spikeruk]

Hi,
Do you have an example of the type of GSM modem this is for?
Would it work with one of those wavecom modems that can take 8 sim cards?

[manuelquiero]

Hi, yes it will work. The original code I based this project on was using an 4-port (4-sim) GSM modem with Wavecom CPU

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On Fri, Mar 24, 2023, 4:04 PM spikeruk ***@***.***> wrote: Hi, Do you have an example of the type of GSM modem this is for? Would it work with one of those wavecom modems that can take 8 sim cards? — Reply to this email directly, view it on GitHub <#1>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A3IXMORS2XN3FASNVFSDUADW5VIPZANCNFSM6AAAAAAWGHDXTM> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[spikeruk]

Thanks
Do you think if I plugged in 2 of these (sim800c usb) would it work?
That would presumably create 2 COM ports, would your code loop over those com ports and detect 2 GSM devices?

[manuelquiero]

Yes. I put a very specific deviceID that is unique to all GSM modems in 'where' clause of the linq in the Win32_PnpEntity in Encoder.cs file. if you want to know more about the Win32_PnPEntity and other windows driver related documentation, you can visit this link https://learn.microsoft.com/en-us/windows/win32/cimwin32prov/win32-pnpentity

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On Sat, Mar 25, 2023, 7:29 PM spikeruk ***@***.***> wrote: Thanks Do you think if I plugged in 2 of these (sim800c usb) would it work? That would presumably create 2 COM ports, would your code loop over those com ports and detect 2 GSM devices? — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A3IXMOR2U6A2YEDPXFJVGFTW53JKZANCNFSM6AAAAAAWGHDXTM> . You are receiving this because you commented.Message ID: ***@***.***>

[spikeruk]

Yes
I've had a look at the code.
I think the issue will be if I plug in two of these sim800c USB devices that will show up as 2 COM ports, but your current code only expects one GSM modem COM port?.

I think it'll be fairly minor to change and i'll just need a separate worker thread for each COM device that is detected?

I have 2 sim800c usb devices currently ordered so will have a play when they arrive.
Your code is really helpful as I haven't done this sort of thing before.

[manuelquiero]

Yes. I've actually tested that code before. I plugged in two GSM modem devices, one wavecom, and the other is a broadband stick, and yes, they were both detected by the application. This is because when I'm writing the code, there was a possibility that the company I'm working for at that time could buy another 4-port GSM modem to expand the capacity of the application. But if it didn't work, let me know. I appreciate your positive inputs. Thanks.

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On Sun, Mar 26, 2023, 8:13 PM spikeruk ***@***.***> wrote: Yes I've had a look at the code. I think the issue will be if I plug in two of these sim800c USB devices that will show up as 2 COM ports, but your current code only expects one GSM modem COM port?. I think it'll be fairly minor to change and i'll just need a separate worker thread for each COM device that is detected? U have 2 sim800c usb devices currently ordered so will have a play when they arrive. Your code is really helpful as I haven't done this sort of thing before. — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A3IXMOXISPAQA5FZZ4U34R3W6A6F5ANCNFSM6AAAAAAWGHDXTM> . You are receiving this because you commented.Message ID: ***@***.***>

[spikeruk]

I'll test when both modems arrive but can't see how it will work as the code is as follows:

Connect button calls -> ConnectToModem() which then calls GetPortInfo()

However GetPortInfo() will only ever return the last port.
It has a foreach loop but the 'port' variable is overwritten each time.
Therefore I'm not sure how this version on Github could ever work with 2 modems?

[manuelquiero]

Ok, I'll check it out later.

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On Mon, Mar 27, 2023 at 3:04 PM spikeruk ***@***.***> wrote: I'll test when both modems arrive but can't see how it will work as the code is as follows: Connect button calls -> ConnectToModem() which then calls GetPortInfo() However GetPortInfo() will only ever return the last port. It has a foreach loop but the 'port' variable is overwritten each time. Therefore I'm not sure how this version on Github could ever work with 2 modems? — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/A3IXMOUNG2HY4S5HYM2DSVTW6E3ZHANCNFSM6AAAAAAWGHDXTM> . You are receiving this because you commented.Message ID: ***@***.***>