mirror of https://github.com/arendst/Tasmota.git
95 lines
2.3 KiB
Markdown
95 lines
2.3 KiB
Markdown
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# ESP-KNX-IP #
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This is a library for the ESP8266 to enable KNXnet/IP communication. It uses UDP multicast on 224.0.23.12:3671.
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It is intended to be used with the Arduino platform for the ESP8266.
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## How to use ##
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The library is under development. API may change multiple times in the future.
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API documentation is available [here](https://github.com/envy/esp-knx-ip/wiki/API)
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A simple example:
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```c++
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#include <esp-knx-ip.h>
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const char* ssid = "my-ssid"; // your network SSID (name)
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const char* pass = "my-pw"; // your network password
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config_id_t my_GA;
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config_id_t param_id;
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int8_t some_var = 0;
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void setup()
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{
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// Register a callback that is called when a configurable group address is receiving a telegram
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knx.register_callback("Set/Get callback", my_callback);
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knx.register_callback("Write callback", my_other_callback);
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int default_val = 21;
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param_id = knx.config_register_int("My Parameter", default_val);
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// Register a configurable group address for sending out answers
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my_GA = knx.config_register_ga("Answer GA");
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knx.load(); // Try to load a config from EEPROM
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WiFi.begin(ssid, pass);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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}
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knx.start(); // Start everything. Must be called after WiFi connection has been established
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}
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void loop()
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{
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knx.loop();
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}
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void my_callback(message_t const &msg, void *arg)
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{
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switch (msg.ct)
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{
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case KNX_CT_WRITE:
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// Save received data
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some_var = knx.data_to_1byte_int(msg.data);
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break;
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case KNX_CT_READ:
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// Answer with saved data
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knx.answer1ByteInt(msg.received_on, some_var);
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break;
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}
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}
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void my_other_callback(message_t const &msg, void *arg)
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{
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switch (msg.ct)
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{
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case KNX_CT_WRITE:
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// Write an answer somewhere else
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int value = knx.config_get_int(param_id);
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address_t ga = knx.config_get_ga(my_GA);
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knx.answer1ByteInt(ga, (int8_t)value);
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break;
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}
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}
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```
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## How to configure (buildtime) ##
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Open the `esp-knx-ip.h` and take a look at the config options at the top inside the block marked `CONFIG`
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## How to configure (runtime) ##
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Simply visit the IP of your ESP with a webbrowser. You can configure the following:
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* KNX physical address
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* Which group address should trigger which callback
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* Which group address are to be used by the program (e.g. for status replies)
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The configuration is dynamically generated from the code.
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