PlatformIO Core uses Python’s underlying requests library for HTTP requests.
You will need to define a standard environment variable (HTTP_PROXY,
HTTPS_PROXY, or ALL_PROXY) depending on your proxy server, and
disable the proxy server certificate verification setting
enable_proxy_strict_ssl to false.
See other proxy and SSL configuration environment variables in the official Requests Proxies documentation.
Examples
# Disable proxy server certificate verification
$ pio settings set setting_enable_proxy_strict_ssl false
# or using global environment variable
$ export PLATFORMIO_SETTING_ENABLE_PROXY_STRICT_SSL="false"
#
# Configure proxy server
#
# Unix
$ export HTTP_PROXY="HTTP_PROXY=http://user:pass@10.10.1.10:3128/"
# without authentication
$ export HTTPS_PROXY="http://10.10.1.10:1080"
$ export ALL_PROXY="socks5://10.10.1.10:3434"
# Windows
set HTTP_PROXY="HTTP_PROXY=http://user:pass@10.10.1.10:3128/"