Functionality

This fork lets you control your logicdata standing desk via ESPHome/with an ESP32. It offers function for up, down, memory position 1 and memory position 2. Notice that saving of memory positions is only possible if you have a handset that ofers a save button.

Additionally you find my lovelace card configuration to control your desk with a small tile if needed:

Motivation and history

This repository is a fork of [esphome-standing-desk](https://github.com/tjhorner/esphome-standing-desk) by @tjhorner. At the same time it merges the adoptions [DanielHabenicht / logicdata-standing-desk](https://github.com/DanielHabenicht/logicdata-standing-desk/tree/main) to have functionality for Logicdata desk - but ended up not using it at the moment (read below).

This fork/merger was created to make it compatible with latest ESPHome Version. Within further deep dive into the topic I had to experience, that the configuration by @DanielHabenicht wouldn't function properly on my desk:

• current height was not measured (sensor had no value)
• up button moved desk up, but not to the highest level
• save button wouldn't save any position, but instead moved the desk up to it's maximum level
• memory position 4 was without any function

So I thought I messed up with the wiring and re-measured the voltage for the 7 Pins on the connector and so on. But everything was correct. Then I dived deeper into to provided records from SeaLogicAnalyzer but I ended up realizing that if somethings messed up I wouldn't be able to find the correct way with the given information.

So I started to give 5 Volts to the pins manually and noticed, that you can address the basic functions of the logicdata control unit quite simple. For me this is: Up, Down, Memory1 to Memory5 and even save. Personally I don't need more than this.

In the future I will probably work to get the "current height" sensor working in Order to send a specific height.

Setup

First of all the Layout of the 7-Pin-Din connector:

Here's what worked for me:

Line	Description	Colours	ESP32 Pin
SHELL	Ground	Grey	GND
1	up	white	GPIO16
5	Memory Position 1	blue	GPIO17
2	Memory Position 2 (Position 3 on handset)	green	GPIO18
4	down	yellow	GPIO19
6	(not sure if needed)	red	GPIO21

So the following Pin / cable doesn't need to be connected for basic functionality (up/down/mem1/mem2/mem3/mem4/save):

Line	Description	Colours	ESP32 Pin
3		brown	-
7	5V Powersupply	black	VIN / +5V

According to my investigations adressing the functions works as follows:

Function	Bit1	Bit2	Bit3	Bit4
Memory1	0	1	0	0
Memory2	0	0	1	0
Memory3	0	0	1	1
Memory4	0	1	0	1
Up	1	0	0	0
Down	0	0	0	1
Save	1	0	0	1

I used 7-Pin-DIN Y-Splitter-Cable from here: Aliexpress. I ordered two of them and cut one on the female end and connected the wires to and ESP32.