[Ovmsdev] External Wifi antenna

[Craig Leres]

Success!

After protecting nearby components with kynar tape my hot air rework 
made "quick" work of removing the V1 module, including the ground pads 
on the back of the module. Then I hand soldered the new module in. (I 
wasn't sure if re-soldering the ground pads was important but I put a 
little solder paste on it and hit the back side of the board with a 
little hot air afterwards until the TPs flowed so there's some chance 
it's back to its original state.)

I repurposed an SMA/U.FL cable and wifi antenna from an old foxconn 
netbox and once I had flashed it and restore the config my wifi signal 
improved from -80.7 to -53.6 dBm. I'm pretty sure my (brick) chimney is 
inbetween my ruckus ap and this vehicle and had been thinking about 
relocating the ap but no need now.

     OVMS# module sum
     OVMS MODULE SUMMARY

     Module
       Version:  3.2.015-550-g49f7b669/factory/main (build idf 
v3.3.4-845-gd59ed8bba-dirty Jan 30 2021 18:31:40)
       Hardware: OVMS WIFI BLE BT cores=2 rev=ESP32/3

It doesn't look like ovms knows there is extra memory?

     OVMS# module memory
     Free 8-bit 83756/277928, 32-bit 6836/11192, SPIRAM 3826192/4194252

Also when I was bootstrapping the old config a wifi scan listed my WPA3 
ssid but the module couldn't associate with it. But I do see an option 
with newer versions of the idf:

 
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/kconfig.html#config-esp32-wifi-enable-wpa3-sae
     CONFIG_ESP32_WIFI_ENABLE_WPA3_SAE

     Select this option to allow the device to establish a WPA3-Personal
     connection with eligible AP's. PMF (Protected Management Frames)
     is a prerequisite feature for a WPA3 connection, it needs to
     be explicitly configured before attempting connection. Please
     refer to the Wi-Fi Driver API Guide for details.

I'm not sure if WPA3 requires V3 hardware or if it's purely an idf thing 
but it's something fun for the future.

		Craig
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