Character Font, Scrolling Text, API, Alternative Clock with Second Pixel

README.md

@@ -109,16 +109,16 @@ The name of the created network can be changed by modifying `WIFI_MANAGER_SSID`
 
 Connect them like this and remember to set them in `include/constants.h` according to your board.
 
-| LCD              | ESP32  | TTGO LoRa32 | NodeMCUv2 |Lolin D32 (Pro) |
-| :--------------: | :----: | :---------: | :-------: | :------------: |
-| GND              |  GND   |     GND     |    GND    | GND            |
-| VCC              |   5V   |     5V      |    VIN    | USB            |
-| EN (PIN_ENABLE)  | GPIO26 |    IO22     | GPIO16 D0 | GPIO26         |
-| IN (PIN_DATA)    | GPIO27 |    IO23     | GPIO13 D7 | GPIO27         |
-| CLK (PIN_CLOCK)  | GPIO14 |    IO02     | GPIO14 D5 | GPIO14         |
-| CLA (PIN_LATCH)  | GPIO12 |    IO15     | GPIO0 D3  | GPIO12         |
-| BUTTON one end   | GPIO16 |    IO21     | GPIO2 D4  | GPIO25         |
-| BUTTON other end |  GND   |     GND     |    GND    | GND            |
+|       LCD        | ESP32  | TTGO LoRa32 | NodeMCUv2 | Lolin D32 (Pro) |
+| :--------------: | :----: | :---------: | :-------: | :-------------: |
+|       GND        |  GND   |     GND     |    GND    |       GND       |
+|       VCC        |   5V   |     5V      |    VIN    |       USB       |
+| EN (PIN_ENABLE)  | GPIO26 |    IO22     | GPIO16 D0 |     GPIO26      |
+|  IN (PIN_DATA)   | GPIO27 |    IO23     | GPIO13 D7 |     GPIO27      |
+| CLK (PIN_CLOCK)  | GPIO14 |    IO02     | GPIO14 D5 |     GPIO14      |
+| CLA (PIN_LATCH)  | GPIO12 |    IO15     | GPIO0 D3  |     GPIO12      |
+|  BUTTON one end  | GPIO16 |    IO21     | GPIO2 D4  |     GPIO25      |
+| BUTTON other end |  GND   |     GND     |    GND    |       GND       |
 
 <img src="https://user-images.githubusercontent.com/86414213/205999001-6213fc4f-be2f-4305-a17a-44fdc9349069.jpg" width="60%" />
 
@@ -202,6 +202,56 @@ void MyPlugin::websocketHook(DynamicJsonDocument &request) {
 pluginManager.addPlugin(new MyPlugin());
 ```
 
+# External Call
+
+The LED Display service provides a simple yet powerful external interface that allows users to display messages and graphs on a 16x16 LED display. This functionality can be accessed through HTTP calls to the service endpoint.
+
+## Message Display
+
+To display a message on the LED display, users can make an HTTP GET request to the following endpoint:
+
+```
+http://your-server/message
+```
+
+### Parameters
+
+- `text` (optional): The text message to be displayed on the LED display.
+- `graph` (optional): A comma-separated list of integers representing a graph. The values should be in the range of 0 to 15 and will be visualized as a graph on the LED display.
+- `miny` (optional): scaling for lower end of the graph, defaults to 0
+- `maxy` (optional): scaling for upper end of the graph, defaults to 15
+- `repeat` (optional): The number of times the message should be repeated. If not provided, the default is 1. Set this value to -1 to repeat infinitely. While messages ar pending for display an indicator led in the upper left corner will flash.
+- `id` (optional): A unique identifier for the message. This can be used for later removal or modification of the message.
+- `delay` (optional): The number of ms of delay between every scroll move. Default is 50 ms.
+
+#### Example
+
+```
+GET http://your-server/message?text=Hello&graph=8,5,2,1,0,0,1,4,7,10,13,14,15,15,14,11&repeat=3&id=1;delay=60
+```
+
+This example will display the message "Hello" on the LED display with a corresponding graph, repeat it three times, and assign it the identifier 1, waits 60ms while scrolling.
+
+## Message Removal
+
+To remove a message from the display, users can make an HTTP GET request to the following endpoint:
+
+```
+http://your-server/removemessage
+```
+
+### Parameters
+
+- `id` (required): The unique identifier of the message to be removed.
+
+#### Example
+
+```
+GET http://your-server/removemessage?id=1
+```
+
+This example will remove the message with the identifier 1 from the LED display.
+
 # Ideas
 
 - [ ] gifs