7-Segment Display TM1637 via ESP01 and MQTT on Home Assistant for newbees

[karefor]

To display the values via MQTT and 7-Segment Display I used gitpod and tasmota master to compile and added the lines

#ifndef USE_DISPLAY
#define USE_DISPLAY
#endif

#ifndef USE_DISPLAY_TM1637
#define USE_DISPLAY_TM1637
#endif
(from https://tasmota.github.io/docs/TM163x/) click ">"

and if you need "MQTT Subscribe" also add:
#ifndef SUPPORT_MQTT_EVENT
#define SUPPORT_MQTT_EVENT
#endif
(from https://tasmota.github.io/docs/MQTT/#clearing-retained-messages)

both in user_config_override.h before the last "endif".

There is a nice video on youtube from vccground where he explains how to compile: (from minute 2:20):
https://www.youtube.com/watch?v=WashxTcHiDc

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To get shown something on the Display write in Tasmota console e.g.:
DisplayNumber 1234
(from https://tasmota.github.io/docs/TM163x/#tm1638-leds-and-buttons)

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How to send the values from Home Assistant to your display-ESP:
Via Einstellungen/Automatisierungen & Szenen Automatisierung erstellen neue Automatisierung erstellen
choose "when entity changes state or any attributes"
Dann mache / Aktion hinzufügen / (here search for "mqtt") choose "MQTT: Veröffentlichen"

at Topic I used:

cmnd/tasmota_200D02/Displaynumber

(tasmota_200D02 has to be replaced with the topic name of y o u r ESP. You will find it at Configuration/Configure MQTT. It is the name after %topic% (tasmota_200D02) in the brackets.)

at Nutzlast-Vorlage I used:

{{ float(states('sensor.tasmota_lk13be_current')) | round(0) }}, 0, 0, 4

(, 0, 0, 4 makes the ciphers right-aligned)
Instead of "sensor.tasmota_lk13be_current" you have to use your own sensors name.
(from #19596)

In the beginning I also had some difficulties with the soldering of the connection-pins of the TM1637 because there was not enough tin solder at the data and clock pins...

Enjoy!