![]() Connecting this module is easy as header pins are installed on the board at the factory. Then connect the SCL and SDA pins to your Arduino, and the Vcc pin to the 5. 1 for data and clock: If you’re using an Pro Mini- compatible the pins are A4 and A5 for data and clock, which are parallel to the main pins, as shown below: DS1. On Arduino Uno or compatible boards, these pins are A4 and A5 for data and clock: If you’re using an Arduino Mega the pins are D2. C bus – these will be knows as SDA (or data) and SCL (or clock). Moving on – first you will need to identify which pins on your Arduino or compatible boards are used for the I2. It is intended to be used with the Time library.Ĭ tutorials (chapters 2. C bus and Arduino, check out the I2.ĭS1307RTC Library DS1307RTC allows you to access real time clock (RTC) chips compatible with the DS1307. Along with keeping track of the time and date, these modules also have a small EEPROM, an alarm function (DS3. If you’re going to install the module in a more permanent project, it’s a good idea to buy a new CR2. With both of the modules, a backup battery is installed when you receive them from Tronixlabs, however these are an inexpensive variety and shouldn’t be relied on for more than twelve months. 1 is much more accurate, as it has an internal oscillator which isn’t affected by external factors – and thus is accurate down to a few minutes per year at the most. This may sound like a problem, however will usually result with the clock being off by around five or so minutes per month. 7 used in the first module works very well, however the external temperature can affect the frequency of the oscillator circuit which drives the DS1. 1: There are two main differences between the ICs on the real- time clock modules, which is the accuracy of the time- keeping. For this Arduino tutorial we have two real- time clock modules to use, one based on the Maxim DS1. 1 real- time clock modules with Arduino from various sources – so this is the first of a two part tutorial on how to use them. We keep getting requests on how to use DS1. ![]()
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