[Feature Request] Permit modifying WiFi country-code for RP2040W

[khoih-prog]

It's great if we can provide a way for users to change WiFi country-code, if necessary. Check Pi PICO-W WifiServer example code failure #860 for possible reason to use correct country-code as MICROPYTHON can do.

Currently, I can see a tempo way to modify is to change picow_init.cpp of RP2040W to, e.g CYW43_COUNTRY_UK

#include <pico/cyw43_arch.h>

extern "C" void initVariant() {
  //cyw43_arch_init();
  // Select country code, if necessary
  // For example: CYW43_COUNTRY_AUSTRALIA, CYW43_COUNTRY_CANADA, CYW43_COUNTRY_CHINA, CYW43_COUNTRY_FRANCE, CYW43_COUNTRY_GERMANY, 
  // CYW43_COUNTRY_INDIA, CYW43_COUNTRY_ITALY, CYW43_COUNTRY_JAPAN, CYW43_COUNTRY_NETHERLANDS, CYW43_COUNTRY_SOUTH_KOREA, 
  // CYW43_COUNTRY_SWEDEN, CYW43_COUNTRY_UK, CYW43_COUNTRY_USA, etc.
  cyw43_arch_init_with_country(CYW43_COUNTRY_UK);
}

from

#include <pico/cyw43_arch.h>

extern "C" void initVariant() {
    cyw43_arch_init();
}

---

I'm confident @earlephilhower will know the better way to let users to select, without manually changing the core's file. The best, IMO, is to select via the board selection / makeboards.py, similar to Flash Size, CPU Speed, etc.

[earlephilhower]

Simple enough to do as a menu item. Would be possible to do at runtime but requires add'l work to make the CYW43 initialization lazy (i.e. store any overridden WIFI regions and only call cyw3_init() when doing WiFi.begin/beginAP or a write to the LED pin) so that's not supported for now.

[khoih-prog]

Great. You're amazingly quick and efficient. Have been learning quite a lot from your works.

[khoih-prog]

Working great in menu and compiling.

However, I can't upload using either Arduino IDE v1.8.16 or v1.8.19. The error is it's trying to use non-existing 2.5.4/system/python3/python3

Sketch uses 347132 bytes (22%) of program storage space. Maximum is 1568768 bytes.
Global variables use 68876 bytes (26%) of dynamic memory, leaving 193268 bytes for local variables. Maximum is 262144 bytes.
/home/kh/.arduino15/packages/rp2040/hardware/rp2040/2.5.4/system/python3/python3 -I /home/kh/.arduino15/packages/rp2040/hardware/rp2040/2.5.4/tools/uf2conv.py --serial /dev/ttyACM0 --family RP2040 --deploy /tmp/arduino_build_309113/Async_AdvancedWebServer_Country.ino.uf2 
java.io.IOException: Cannot run program "/home/kh/.arduino15/packages/rp2040/hardware/rp2040/2.5.4/system/python3/python3": error=2, No such file or directory
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
    at java.lang.Runtime.exec(Runtime.java:620)
    at java.lang.Runtime.exec(Runtime.java:485)
    at processing.app.helpers.ProcessUtils.exec(ProcessUtils.java:11)
    at cc.arduino.packages.Uploader.executeUploadCommand(Uploader.java:129)
    at cc.arduino.packages.uploaders.SerialUploader.runCommand(SerialUploader.java:383)
    at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:197)
    at cc.arduino.UploaderUtils.upload(UploaderUtils.java:77)
    at processing.app.SketchController.upload(SketchController.java:732)
    at processing.app.SketchController.exportApplet(SketchController.java:703)
    at processing.app.Editor$UploadHandler.run(Editor.java:2081)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: error=2, No such file or directory
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:247)
    at java.lang.ProcessImpl.start(ProcessImpl.java:134)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
    ... 11 more
An error occurred while uploading the sketch

The problem is created by these new lines in platform.txt

https://github.com/earlephilhower/arduino-pico/blob/7a85c3917f9e931202c38d5cb5292f69af7abef0/platform.txt#L25-L29

[earlephilhower]

Not sure what your setup is, but you can't just extract the changes here onto a Board Manager installation, you need to use a GIT copy. The lines you have listed are needed when using GIT copies, and are removed as part of the packaging process. https://github.com/earlephilhower/arduino-pico/blob/7a85c3917f9e931202c38d5cb5292f69af7abef0/package/build_boards_manager_package.sh#L104-L118

[khoih-prog]

Sorry, I followed the sequence according to Installing via GIT

mkdir -p ~/Arduino/hardware/pico
git clone https://github.com/earlephilhower/arduino-pico.git ~/Arduino/hardware/pico/rp2040
cd ~/Arduino/hardware/pico/rp2040
git submodule update --init
cd pico-sdk
git submodule update --init
cd ../tools
python3 ./get.py

but the platform.txt still contains

runtime.tools.pqt-gcc.path={runtime.platform.path}/system/arm-none-eabi
runtime.tools.pqt-python3.path={runtime.platform.path}/system/python3
runtime.tools.pqt-mklittlefs.path={runtime.platform.path}/system/mklittlefs
runtime.tools.pqt-pioasm.path={runtime.platform.path}/system/pioasm
runtime.tools.pqt-elf2uf2.path={runtime.platform.path}/system/elf2uf2

[earlephilhower]

They're suppose to be there in the GIT version. The get.py will DL and install the toolchain in ~/Arduino/hardware/pico/rp2040/system and those lines will reference it. This can't be done in the ~/.arduino15/... board manager dirs.

Also if you have 2 copies of the repo, make sure you select the one that says (from sketchbook) (or similar...don't remember exact wording).

[khoih-prog]

Thanks. Just come back and retest. OK now when changing country via board-package menu

Start Async_AdvancedWebServer_Country on RASPBERRY_PI_PICO_W with RP2040W CYW43439 WiFi
AsyncTCP_RP2040W v1.0.0
AsyncWebServer_RP2040W v1.0.3
Connecting to SSID: HueNet1
SSID: HueNet1
Local IP Address: 192.168.2.180
Country code: XX
HTTP EthernetWebServer is @ IP : 192.168.2.180
.......... ...

Start Async_AdvancedWebServer_Country on RASPBERRY_PI_PICO_W with RP2040W CYW43439 WiFi
AsyncTCP_RP2040W v1.0.0
AsyncWebServer_RP2040W v1.0.3
Connecting to SSID: HueNet1
SSID: HueNet1
Local IP Address: 192.168.2.180
Country code: CA
HTTP EthernetWebServer is @ IP : 192.168.2.180
..

Start Async_AdvancedWebServer_Country on RASPBERRY_PI_PICO_W with RP2040W CYW43439 WiFi
AsyncTCP_RP2040W v1.0.0
AsyncWebServer_RP2040W v1.0.3
Connecting to SSID: HueNet1
SSID: HueNet1
Local IP Address: 192.168.2.180
Country code: US
HTTP EthernetWebServer is @ IP : 192.168.2.180
.