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Xinyuan-LilyGO / LilyGO-T-SIM7000G

LilyGO T-SIM7000G
https://pt.aliexpress.com/item/4000542688096.html
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Schematic for T-SIM7070G #228

Closed xyzzy42 closed 1 year ago

xyzzy42 commented 1 year ago

There does not seem to be a schematic for this board.

It looks like it is similar to T-SIM7000G. But are there differences? For instance, does it have GPS antenna power on GPIO4 of SIMCOM 7070G module?

xyzzy42 commented 1 year ago

Tracing the connections on the board and tests show that GPS antenna power is on GPIO 5 on the TSIM-7070G.

lewisxhe commented 1 year ago

yes i found that too it's different from 7000G, it's been fixed here, thanks https://github.com/Xinyuan-LilyGO/LilyGO-T-SIM7000G/commit/3ea23765b752bb513105a3ea6e81696418cb60a1

xyzzy42 commented 1 year ago

It might be better to use AT+CGPIO=0,48,1,1 instead of the SGPIO command. The CGPIO version uses the pin number instead of the gpio number. The pin is 48 on both SIM7000 and SIM7070 so the same command will work on both. This is simpler and also does not unnecessarily control the other GPIO not used for GPS power.

There are also a bunch of places not fixed for SIM7070.

Like the main documentation, https://github.com/Xinyuan-LilyGO/LilyGO-T-SIM7000G/blob/e04c7a11ddd73bf550121aeabd3b11e81896c4dc/README.MD?plain=1#L42

Also here:

https://github.com/Xinyuan-LilyGO/LilyGO-T-SIM7000G/blob/e04c7a11ddd73bf550121aeabd3b11e81896c4dc/examples/Arduino_NetworkTest/Arduino_NetworkTest.ino#L66

https://github.com/Xinyuan-LilyGO/LilyGO-T-SIM7000G/blob/e04c7a11ddd73bf550121aeabd3b11e81896c4dc/examples/Arduino_TinyGSM/AllFunctions/AllFunctions.ino#L126

https://github.com/Xinyuan-LilyGO/LilyGO-T-SIM7000G/blob/e04c7a11ddd73bf550121aeabd3b11e81896c4dc/examples/MicroPython_LoBo/gps.py#L67

And I think firmware T-sim7000X-AllFunctions.bin does not have the command.

lewisxhe commented 1 year ago

Thanks for the reminder, it has been fixed.