My astronomy project:
EQ6 Mount and OnStep driver

Contents:

1. Introduction, EQ6 and OnStep
2. OnStep Hardware
3. Setup FYSETC E4 board
4. Mechanical & Electrical
5. To be continued

Note:
I take no responsibility or liability for what are written here, you use the information on your own risk!

3, Setup FYSETC E4 board:

I decided to go for the FYSETC E4 board. It will make it a lot easier to build this OnStep controller. No problems with the circuit board, almost all is there that I need. It's normally used to control 3D-printers and that is very similar to control a mount with its stepper motors.

More to read about OnStep:

• https://onstep.groups.io/g/ main/ wiki/ 3860OnStep
• https://github.com/ ozarchie/ OnStepGitHub Ozarchie

FYSETC E4 board:

This is how it looks like, even the heat sinks for the stepper motor drivers and an USB A/B cable were included. I bought the version with an internal WIFI antenna. The enclosure's lid will be 3D-printed in plastic and will not shield off the rf-signal.

More info about the FYSETC E4 board:

• https://wiki.fysetc.com/ E4/FYSETC E4

Firmware:

What's even better, there a lot written about this board and how to setup it for OnStepX. OnStepX is a never version of OnStep with a lot of extra futures.

Instructions how to setup the FYSETC E4 for OnStepX:

• https://onstep.groups.io/ g/ main/ wiki/ 32747Wiki
• https://onstep.groups.io/ g/ main/ wiki/ 32794Uploading Firmware, Wiki

Prepare Arduino IDE:

Before doing this, check that you have the latest version of Arduino IDE installed.

I follow the instructions and install the esp32 by Espressif:

I took some minutes to install, no errors did occur.

Maybe it ask about updates, if there is, Install All.

ESP32 board:

Open the board manager. Select your board. It comes hundreds of different esp32 boars to choose from. The instructions say: ESP32 support. Confusing !

Looking at the esp32 processor. Hard to read "ESPRESSIF" and "ESP32 WROOM 32".

The closest I found was: ESP32-WROOM-DA Module. Choose that and do a test if it works.