ATtiny85 Phone Charge Guard - EasyEDA open source hardware lab
Xanthium enterprises - RS485 communication between PC and ATiny.A C# program running on the PC controls the ATtiny board through RS485 protocol.Visit https://goo.gl/uvyGhG | Facebook
TTL to RS485 Automatic Control Module - high compatibility.
Arduino pwm attiny – Kaufen Sie Arduino pwm attiny mit kostenlosem Versand auf AliExpress version
BlueRobotics BLUART USB-zu-Serien- und RS485-Adapter - RobotShop
MAX483/485 am Attiny - Deutsch - Arduino Forum
Digistump and Modbus RTU : 6 Steps - Instructables