Update README.md document WPA_COUNTRY Code format (RPi-Distro#636)

raspi-config will silently fail, if the argument to `do_wifi_country` is not an uppercase 2-letter Code from the list in /usr/share/zoneinfo/iso3166.tab
mikkeltech · Oct 3, 2022 · 4da0392 · 4da0392
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commit 4da0392
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -194,7 +194,7 @@ The following environment variables are supported:
 
  * `WPA_ESSID`, `WPA_PASSWORD` and `WPA_COUNTRY` (Default: unset)
 
-   If these are set, they are use to configure `wpa_supplicant.conf`, so that the Raspberry Pi can automatically connect to a wireless network on first boot. If `WPA_ESSID` is set and `WPA_PASSWORD` is unset an unprotected wireless network will be configured. If set, `WPA_PASSWORD` must be between 8 and 63 characters.
+   If these are set, they are use to configure `wpa_supplicant.conf`, so that the Raspberry Pi can automatically connect to a wireless network on first boot. If `WPA_ESSID` is set and `WPA_PASSWORD` is unset an unprotected wireless network will be configured. If set, `WPA_PASSWORD` must be between 8 and 63 characters. `WPA_COUNTRY` is a 2-letter ISO/IEC 3166 country Code, i.e. `GB`
 
  * `ENABLE_SSH` (Default: `0`)