Wio_LTE(SKU: 102990925, 102990924, 102990923, 102990837)

Q1:   Why does Espruino IDE display  "Disconnected" during phone call?
A1: If we see "Disconnected" during phone call as below, the root cause is that power supply is not sufficient. Please conenct the battery or connect to a hub with sufficiant power.
--------------------------------------------
_____               _
| __|___ ___ ___ _ _|_|___ ___
| __|_ -| . | _| | | | | . |
|_____|___| _|_| |___|_|_|_|___|
        |_| http://espruino.com
1v94 Copyright 2016 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
>
=undefined
AT passedd
PS attachment succeeded
currently selected operator :+COPS: 0,0,"CHINA MOBILE",7
connectCB entered...
PDP context successfully activated
connectCB entered...
null 10.114.177.248
IP address allocated, modem is ready to use
>
Disconnected

Q2: Why do we see **Geolocalization error : +CME ERROR: 516** during running GPS code on Espruino IDE
A2:  When +CME ERROR: 516 stop logging out, type GeoLoc() to get location data. Sometimes  other GNSS error code may log out like +CME: 514, it tell GNSS was locked. Go to GNSS AT Command Manual for the explanations.

-------------------------------------------- 
 ___               _
| __|___ ___ ___ _ _|_|___ ___
| __|_ -| . | _| | | | | . |
|_____|___| _|_| |___|_|_|_|___|
          |_| http://espruino.com
1v94 Copyright 2016 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
>
=undefined
AT passed
PS attachment succeeded
currently selected operator :+COPS: 0,0,"CHINA MOBILE",7
connectCB entered...
PDP context successfully activated
connectCB entered...
null 10.200.47.30
IP address allocated, modem is ready to use
Starting GeoLocalization
Geolocalization error : +CME ERROR: 516
Geolocalization error : +CME ERROR: 516

Q3: We fail to use Arduino IDE to download the program and see below error info at bottom of Arduino IDE.
A3: It is a bug. When using Arduino serial port to print info, the Arduino IDE remembers the serial port number. So there is no serial port available for downloading new program. We can reboot the Arduino IDE to solve the issue as temporary solution. For the preventive solution, please use other COM monitor software, such as SSCOM. Please make sure we see the processing bar during program downloading. Or else, we will see below info and the program is not downloaded. 
 --------------------------------------------  
Sketch uses 23068 bytes (2%) of program storage space. Maximum is 1048576 bytes.
Global variables use 13864 bytes of dynamic memory.
DFU begin
dfu-util 0.8

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org

Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
No DFU capable USB device available
DFU end

Q4: We See the "STM32 Virtual ComPort in FS Mode" in device manger and can't download the program.
A4: Please press RST and Boot buttons, then release RST button first and then Boot button. Or we can hold the boot button and then plug the USB to PC. We will see the "STM32 BOOTLOADER". We can download the programing now. Here is the successful programing downloading log. 
   --------------------------------------------  
Sketch uses 23076 bytes (2%) of program storage space. Maximum is 1048576 bytes.
Global variables use 13864 bytes of dynamic memory.
DFU begin
dfu-util 0.8

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2014 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to dfu-util@lists.gnumonks.org

Opening DFU capable USB device...
ID 0483:df11
Run-time device DFU version 011a
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 2048
DfuSe interface name: "Internal Flash "
Downloading to address = 0x08000000, size = 30724

Download [                       ] 0%           0 bytes
Download [=                       ] 6%       2048 bytes
Download [===                     ] 13%       4096 bytes
Download [====                   ] 19%       6144 bytes
Download [======                 ] 26%       8192 bytes
Download [========               ] 33%       10240 bytes
Download [=========               ] 39%       12288 bytes
Download [===========             ] 46%       14336 bytes
Download [=============           ] 53%       16384 bytes
Download [==============         ] 59%       18432 bytes
Download [================       ] 66%       20480 bytes
Download [==================     ] 73%       22528 bytes
Download [===================     ] 79%       24576 bytes
Download [=====================   ] 86%       26624 bytes
Download [======================= ] 93%       28672 bytes
Download [======================== ] 99%       30720 bytes
Download [=========================] 100%       30724 bytes
Download done.
File downloaded successfully
Resetting USB to switch back to runtime mode
Invalid DFU suffix signature
A valid DFU suffix will be required in a future dfu-util release!!!
can't detach
DFU end


Q5: We can't see the COM port in device manager after changing dfu driver.
A5: Please press the RST button and we will see the COM port in device manager.

Q6: We can't see any info on the Zadig software.
A6: Please click Options--> List All Devices, then select STM32 Virtual COM Ports.

Q7: When we change the DFU driver to WINUSB during Arduino programming, do we need to change back to original when we switch to Javascript program? 
A7: No, the WINUSB driver works well with Javascript.

Q8: Where can I get more Javascript demos? 
A8: Here is https://github.com/Seeed-Studio/Wio_LTE_JavaScript_Demo

Q9: Where can I find technical support if I have some other issue.
A9: Please send an email to techsupport@seeed.cc

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