text
// das Ziel im HTML
und Server:
if(ESPSerial.available())
{
String Text=ESPSerial.readStringUntil('\n');
WiFiClient client = server.client();
client.println(Text);
}
oder:
if(ESPSerial.available())
{
String Text=ESPSerial.readStringUntil('\n');
server.send(200, "text/plain",Text);
}
oder:
if(ESPSerial.available())
{
String Text=ESPSerial.readStringUntil('\n');
server.send(200, "text/json", "{Sender: "+ Text+"}");
}