Last Updated or created 2023-10-20 UPDATE 20231020 – Via USB Serial (also schematic for below integration)https://www.henriaanstoot.nl/2023/10/20/thunderbird-mail-notification-flag-via-usb/ Using a servo which is MQTT controlled, and a slash command in Mattermost, i can be notified by friends and colleages. Flag, and monitor-stand are 3D printed. ESP is a simple wemos mini. Spread the love