36 lines
1005 B
ReStructuredText
36 lines
1005 B
ReStructuredText
Custom I²C Device
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=================
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Lots of devices communicate using the I²C protocol. If you want to integrate
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a device into ESPHome that uses this protocol you can pretty much use almost
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all Arduino-based code because the ``Wire`` library is also available in ESPHome.
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See the other custom component guides for how to register components and make
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them publish values.
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.. code-block:: cpp
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#include "esphome.h"
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class MyCustomComponent : public Component {
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public:
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void setup() override {
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// Initialize the device here. Usually Wire.begin() will be called in here,
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// though that call is unnecessary if you have an 'i2c:' entry in your config
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Wire.begin();
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}
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void loop() override {
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// Example: write the value 0x42 to register 0x78 of device with address 0x21
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Wire.beginTransmission(0x21);
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Wire.write(0x78);
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Wire.write(0x42);
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Wire.endTransmission();
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}
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};
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See Also
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--------
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- :ghedit:`Edit`
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