Added example how to use esphome component

examples/esphome/.gitignore

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+# Gitignore settings for ESPHome
+# This is an example and may include too much for your use-case.
+# You can modify this file to suit your needs.
+/.esphome/
+**/.pioenvs/
+**/.piolibdeps/
+**/lib/
+**/src/
+**/platformio.ini
+/secrets.yaml

examples/esphome/TM1638-nodemcu-demo.yaml

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+esphome:
+  name: tm1638_nodemcu_lolin
+  platform: ESP8266
+  board: nodemcuv2
+  includes:
+    - TM1638Sensor.h
+  libraries:
+    - TM1638lite
+
+
+wifi:
+ networks:
+  ssid: "esphome"
+  password: "12345678"
+
+captive_portal:
+
+# Enable logging
+logger:
+
+# Enable Home Assistant API
+api:
+  password: "chugaister"
+
+ota:
+  password: "chugaister"
+
+time:
+  - platform: homeassistant
+    id: homeassistant_time
+
+custom_component:
+- lambda: |-
+    static auto my_component = new TM1638Component();
+    App.register_component(my_component);
+    return {my_component};
+  id: tm1638
+
+
+binary_sensor:
+  - platform: custom
+    lambda: |-
+      TM1638Component *c = static_cast<TM1638Component *>(const_cast<custom_component::CustomComponentConstructor *>(&tm1638)->get_component(0));
+      return { c->buttons };
+
+    binary_sensors:
+      - name: "M1638 buttons 1"
+      - name: "M1638 buttons 2"
+      - name: "M1638 buttons 3"
+      - name: "M1638 buttons 4"
+      - name: "M1638 buttons 5"
+      - name: "M1638 buttons 6"
+      - name: "M1638 buttons 7"
+      - name: "M1638 buttons 8"
+
+
+
+switch:
+- platform: custom
+  lambda: |-
+      TM1638Component *c = static_cast<TM1638Component *>(const_cast<custom_component::CustomComponentConstructor *>(&tm1638)->get_component(0));
+      return { c->leds };
+  switches:
+    name: "tm1638led"

examples/esphome/TM1638Sensor.h

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+#include "esphome.h"
+#include "TM1638lite.h"
+#include <string.h>
+
+using namespace esphome;
+
+class TM1638Component;
+
+class TM1638Led : public Switch, public Component {
+ public:
+  const int i;
+  TM1638lite &tm;
+
+  TM1638Led(TM1638lite &t, const int n, const std::string name): Switch(name), i(n), tm(t)
+  {
+  }
+
+  void write_state(bool state) override {
+    tm.setLED(i, state & 1);
+    publish_state(state);
+  }
+
+};
+
+class TM1638Button : public BinarySensor {
+ public:
+  int i = 0;
+  TM1638Component *parent = nullptr;
+};
+
+class TM1638Component : public PollingComponent, public CustomAPIDevice {
+ public:
+  TM1638lite tm = TM1638lite(12, 14, 4); // arduino pin numbers strobe/clock/data
+  std::vector<BinarySensor *> buttons;
+  std::vector<Switch *> leds;
+  std::vector<TM1638Button *> buttons_;
+  std::vector<TM1638Led *> leds_;
+  char txt[10];
+  int show_text = 0;
+  int scroll = 0;
+
+  TM1638Component() : PollingComponent(100) { 
+  for (uint8_t position = 0; position < 8; position++) {
+    auto btn = new TM1638Button;
+    buttons_.push_back(btn);
+    buttons.push_back(btn);
+
+
+    const char *n ="012345678";
+    char name[] = "led ";
+    name[3]=n[position];
+
+    auto led = new TM1638Led(tm, position, name);
+    App.register_switch(led);
+    leds_.push_back(led);
+    leds.push_back(led);
+  }
+   strncpy(txt, "Hello        ", 10);
+  }
+
+  void setup() override {
+    ESP_LOGI("tm1651", "Creation");
+    tm.reset();
+
+    tm.displayText(txt);
+
+    register_service(&TM1638Component::on_set_text, "display_text", {"text", "time"});
+
+    update();
+  }
+
+  void on_set_text(std::string text, int time)
+  {
+     strncpy(txt, text.c_str(), std::min(text.size(), size_t(10)));
+     tm.displayText(txt);
+     show_text = time;
+  }
+
+  void do_scroll()
+  {
+	    if (show_text == 0) {
+		    auto time = id(homeassistant_time).now();
+		    time.strftime(txt, 10, "%T");
+		    tm.displayText(txt);
+	    }
+	    else {
+		--show_text;
+	    }
+    }
+
+  void update() override {
+    if (scroll < 0) {
+	scroll = 10;
+	do_scroll();
+    }
+    static uint8_t btns = 3;
+    uint8_t buttons = tm.readButtons();
+    if (btns != buttons) {
+        doLEDs(buttons);
+	ESP_LOGI("tm1651", " update   %d", buttons);
+	btns = buttons;
+    }
+   --scroll;
+  }
+
+  void doLEDs(uint8_t value) {
+  for (uint8_t position = 0; position < 8; position++) {
+    tm.setLED(position, value & 1 || leds[position]->state);
+    buttons_[position]->publish_state(value);
+    value = value >> 1;
+  }
+ }
+
+};