IKun Focuser

Overview

IKun Focuser is the native INDI driver for the open-hardware EFucoser electronic focuser controller. It supports the following hardware combinations:

Controller	Minimum Firmware	Motor Driver	Connection
ESP8266	1005	STEP/DIR	USB serial, TCP
ESP8266	1103	ULN2003	USB serial, TCP
Arduino Nano	1201	ULN2003	USB serial

Features

• Absolute and relative positioning
• Abort and position synchronization
• Configurable maximum travel
• Direction reversal
• Motor hold control
• Temperature reporting (DS18B20)
• Firmware and controller identification
• Serial (9600-8-N-1) and raw TCP (port 4030) connections via INDI plugins

Installation

When included in an INDI release, install the package containing INDI core drivers. To test before release:

indiserver -vv indi_ikun_focuser

Connection

Serial

1. Connect the controller via USB.
2. Select the port in the Connection tab.
3. Baud rate is fixed at 9600.

TCP (ESP8266 only)

1. Connect to the controller’s Wi-Fi AP (Focuser-<chipid>, password 012345678).
2. Select TCP, enter 192.168.4.1 and port 4030.

Ekos Usage

1. Add IKun Focuser to an Ekos profile.
2. Open the control panel and select Serial or TCP.
3. Configure max travel, speed, acceleration, reverse, and hold.
4. Verify movement with small step counts before autofocus runs.

Troubleshooting

Connection fails: Verify serial port / TCP address, firmware version, and dialout group membership.

Motor does not move: Confirm external 12V power, shared ground, and correct firmware for your motor driver type. Reduce speed if stalling.

Position drift: Enable Motor Hold. Toggle Reverse if direction is wrong.

Support

Firmware, wiring, protocol, and issue tracking: https://github.com/Indigo2233/EFocusor