39 lines
1.0 KiB
ReStructuredText
39 lines
1.0 KiB
ReStructuredText
Custom I²C Device
|
|
=================
|
|
|
|
Lots of devices communicate using the i2c protocol. If you want to integrate
|
|
a device into esphomelib that uses this protocol you can pretty much use almost
|
|
all Arduino-based code because the ``Wire`` library is also available in esphomelib.
|
|
|
|
See the other custom component guides for how to register components and make
|
|
them publish values.
|
|
|
|
.. code-block:: cpp
|
|
|
|
#include "esphomelib.h"
|
|
using namespace esphomelib;
|
|
|
|
class MyCustomComponent : public Component {
|
|
public:
|
|
void setup() override {
|
|
// Initialize the device here. Usually Wire.begin() will be called in here,
|
|
// though that call is unnecessary if you have an 'i2c:' entry in your config
|
|
|
|
Wire.begin();
|
|
}
|
|
void loop() override {
|
|
// Example: write the value 0x42 to register 0x78 of device with address 0x21
|
|
Wire.beginTransmission(0x21);
|
|
Wire.write(0x78);
|
|
Wire.write(0x42);
|
|
Wire.endTransmission();
|
|
}
|
|
};
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :ghedit:`Edit`
|
|
|
|
.. disqus::
|