![]() Please find a proposal for documentation below, comments welcome. While looking at the Wire docs at I noticed that the end() method is also not documented yet. Given there is no repository for the library reference, I'm going to report this here. println( "Scanning.Recently, some new timeout API methods were added to the AVR Wire library (see arduino/ArduinoCore-avr#42), which should be documented. Int nDevices // Declare a variable to store the number of devices found println( "\nI2C Scanner") // Print a message indicating the start of I2C scanningīyte error, address // Declare variables to store errors and device addresses ![]() While (! Serial) // Wait for the serial connection to establish begin( 9600) // Initialize the serial communication with a baud rate of 9600 begin() // Initialize the I2C communication # include // Include the Wire library for I2C communication Use the following code to identify any slave device’s address present on the I2C bus. Luckily, Arduino offers a scanner library that simplifies the process of identifying slave addresses, eliminating the need to sift through lengthy sensor data sheets and confusing online documentation. To read values from components added to an I2C bus in such a project, it is important that you include the correct slave address when coding. You can customize this code to suit whichever sensors you may have in your project, or even display the sensor values on a display module to make your own room thermometer and humidity meter. write(temperature) // Send temperature data to master ![]() ![]() readTemperature() // Read temperature from DHT sensor # define DHTTYPE DHT11 // DHT sensor typeĭelay( 2000) // Wait for 2 seconds for DHT to stabilize # define DHTPIN 4 // Pin connected to DHT sensor read() // Read temperature data from slaveĭelay( 2000) // Wait for 2 seconds before requesting temperature again requestFrom( 8, 1) // Request temperature data from slaveīyte temperature = Wire. The master board can then read the value we sent, then display it on the serial monitor. Let's modify the code we wrote earlier to include the temperature measurement which we will then send to the master board over the I2C bus. ![]()
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