Can't download firmware on SIM7600G most of the time.
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The failure rate is 95%.I bought http://www.caztech.com/lilygo/sim7600/20211220/DSC_0014.JPG and http://www.caztech.com/lilygo/sim7600/20211220/DSC_0015.JPG at Lilygo official shop. I successfully modify, build, download and run Arduino_TinyGSM/AllFunctions/AllFunctions.ino a couple of times which is confirmed by http://www.caztech.com/lilygo/sim7600/20211220/serial-20211220.png where it tells 180 seconds instead of default 30 sec. When I click upload on Arduino, Arduino can't connect /dev/ttyACM0 as http://www.caztech.com/lilygo/sim7600/20211220/arduino-20212220.png. There is tendency of 100% failure on cold morning and some success on warm evening. Is there anyway to download at 100% success rate?
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@Lilygo Could you answer? If this is a defect of my device, I want to ask you to replace.
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@Lilygo Disregard. I successfully upload and run 100%. The cause was USB connection, i.e. connecting to USB 2.0 port makes unreliable.
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@caz that's great , if you have any other questions in use, please feel free to contact us.
