You may also want to check out the custom library I use in this project (and others) to synchronize multiple servomotors: https://github.com/FoxLabsFr/ServoGroup
A big thanks to PCBWay for supporting my project with PCBs and PCBA!
All the parts look great, and I received them quickly. The ordering process was smooth and straightforward — from uploading the design files to selecting options for assembly, everything was clearly explained and easy to navigate.
It is a base shield for the ESP8266 with an integrated PCA9685 I2C servo driver, allowing me to control the 8 micro servos without using almost all of the ESP's GPIO pins.