This example shows how RAK4600 node uses the I2C interface to read and modify the time of DS3231 module.
The example is developed on the basis of standard firmware. The added code is in the comment range of /* User Code */, /* End User Code */
Important information:
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Time reading of DS3231 mode
There is no need to change the default code. Please refer to the example.
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Assigning custom time
The custom time is related to the following definition : #define I2C_WRITE_TEST
Note: If the definition is commented out, custom time will not take effect
Custom time can be set like the following examples:
i2c_data[2] = 0x23; // Set hours
i2c_data[1] = 0x58; // Set minutes
i2c_data[0] = 0x32; // Set seconds -
RAK4600 corresponding pins: 5 (SCL), 4 (SDA)
Please refer to the hardware schematics:
Note: When using RAK5005 WisBlock bottom plate, DS3231 module must be connected first before turning on the power supply