![]() Wire. Serial.begin(9600) // start serial for output Wire.begin() // join i2c bus (address optional for master) ![]() This example code is in the public domain. Refer to the "Wire Slave Sender" example for use with this This function ends a transmission to a peripheral device that was begun by Wire.beginTransmission() and transmits the bytes that were queued by write(). Reads data from an I2C/TWI slave device slave is just to send 6 bytes ("Hello ") to master when prompted. Here is the code which is just copy pasted from Wire library examples ( master reader for master arduino and slave sender for slave arduino. Master sends data seamlessly ( although here master is just reading but i was able to send data from master to slave successfully) but when master requests data from slave it does not get desired response. i have assessed that problem is in requestEvent function of slave as that either doesnt send anything. Once that message is received, it can then be viewed in the Arduino Software (IDE) serial monitor window. ![]() Arduino 1, the Controller, is programmed to request, and then read, 6 bytes of data sent from the uniquely addressed Peripheral Arduino. Syntax Wire.begin () Wire.begin (address) Parameters address: The 7-bit slave address (optional) if not specified, join the bus as a master. Several functions of Arduino's Wire Library are used to accomplish this. This should normally be called only once. Problem only appears when master requests data from another arduino slave (master sends data successfully to slave arduino but vice versa is not true). begin Description Initiate the Wire library and joins the I 2 C bus as a master or slave. To use this library, open the Library Manager in the Arduino IDE and install it from there. Access 1-wire temperature sensors, memory and other chips. Definitely there is something wrong with my approach. The Arduino programming language Reference, organized into Functions, Variable and Constant. Unable to do what i was upto i resorted to example sketches of Wire library to assess what i was doing wrong and to my surprise even example sketches were not working. I am not able to receive bytes from slave arduino. then i wanted to establish i2c communication between 2 arduinos such that both exchange each other's sensors data. I tried i2c EPROM and that worked pretty fine with arduino master.
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