1/7/2023 0 Comments Timer clockAfter setting, the monitor will display the following data: For correct operation, you must first check if the date and time are correct on the computer and start flashing the clock module. This line will contain the computer data, which are used to firmware the real-time clock module. To adjust the time on the module, you need to find the line in the sketch. For this reason, the battery should not be removed while the module is running. This is because the clock will lose power, and the time will stop counting. When the serial monitor window opens, the following lines should appear: It is important to set the baud rate to 57600 bps correctly. Then you have to choose an example in the menu Examples → RTClib → DS1307. You have to wait a few seconds and then remove the battery, and the clock will restart. First, you can see how the program will behave if you remove the battery from the module and replace it with another while the Arduino board is not connected to the computer. When you run the first code, the program will read the data from the module once per second. You need to install the DS1307RTC, TimeLib and Wire libraries to get started with the clock module. To connect to the Arduino board, you need the board itself (Arduino Uno is considered in this case), the RTC DS1307 real-time clock module, wires and a USB cable.įour pins are used to connect the controller to the Arduino – VCC, ground, SCL, SDA… VCC from the clock is connected to 5V on the Arduino, ground from the clock is connected to ground from the Arduino, SDA is A4, SCL is A5. The first group of contacts contains the following pins: The contacts are distributed into two groups, pitch 2.54 mm. There is also a special place on the board for mounting a DS18B20 temperature sensor. The circuit is equipped with resistors, which allow providing the required signal level. Interaction with other devices and exchanging information with them is done using the I2C interface with contacts SCL and SDA. temperature measurement) and read the module’s information. The presence of memory allows you to record various parameters (e.g. This allows you to save on power because, in the case of uninterrupted use will have to spend more voltage, even with the presence of the battery. The module is justified in cases where the data is read rather rarely, at intervals of a week or more. Operating temperature range from -40 ☏ to 185 ☏ (-40 ☌ to 85 ☌).The DS1307 has low power consumption and contains a 2100 year clock and calendar. Both chips are interconnected via the I2C bus. The module has an AT24C32 chip – it is a 32kb non-volatile EEPROM memory. The battery is mounted on the backside of the board. It is based on the DS1307ZN chip and powered by a lithium battery to realize autonomous operation for a long time. The DS1307 is a module that is used for time counting. ☒ ppm at temperatures from 32 ☏ to 104 ☏ (0 ☌ to 40 ☌). Two outputs – first at 32.768 kHz, second programmable from 1 Hz to 8.192 kHz Moduleĭepends on the quartz – typically up to 2.5 seconds per day, it is not possible to achieve accuracy better than 1 second per day. In this table, we have listed the most popular modules and their main characteristics. Comparison of Popular DS1302, DS1307, DS3231 RTC Modules The DS3231 circuitry has built-in quartz and thermal stabilization that allow for high accuracy values. The quartz resonator operates at 32768 Hz, which is a convenient frequency for a conventional binary counter. The electronic circuit includes a chip, a power supply, a quartz resonator and resistors. The real-time clock modules are used to solve this problem. You can’t set the date or day of the week. But the main disadvantage of this function is that it resets to zero when the timer is on. The Arduino has a special function millis(), which can also read different time intervals. The clock counts in units that are convenient for the average person – minutes, hours, days of the week, and others, unlike conventional counters and clock oscillators that read “ticks”.
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