GC9A01 with D1 Mini

Hello,
I try to show informations on a 1.28 Display GC9A01 with the D1 Mini (ESP8266).

esphome:
   name: test-d1mini
   friendly_name: Test_D1mini
 
 esp8266:
   board: d1_mini
 
 logger:
 
 api:
   encryption:
     key: ......
 
 ota:
   password: ....
 
 wifi:
   ssid: !secret wifi_ssid
   password: !secret wifi_password
 
   ap:
     ssid: "Test-D1Mini Fallback Hotspot"
     password: ...
 
 time:
   - platform: homeassistant
     id: esptime
 
 external_components:
   - source: github://pr#3625
     components: [ gc9a01 ]
 
 spi:
   mosi_pin: D7
   clk_pin: D5
 
 
 display:
 - platform: gc9a01
   cs_pin: D8
   dc_pin: D2
   rotation: 90
   lambda: |-
     it.printf(0, 31, id(GCfont00), TextAlign::BASELINE_LEFT, "WAIT...");
 
 font:
   - file: "fonts/GC9A01_Font00.ttf"
     id: GCfont00
     size: 10

But I get no correct output, I see only a grey display, look as there is no reset of the display.

Did anyone of you using this display with a D1 Mini?

When yes, can you shwo me your yaml-file or have anyone an idea?

Thanks

I would start but reading through the pull-request: https://github.com/esphome/esphome/pull/3625 - there appear to be some examples and discussion there.