RX8025T module (with Arduino code)

Share an Arduino code for the RX8025T clock chip## Background: The DS3231 clock chip was used to make dot matrix clocks before. The biggest advantage of this clock chip is its high precision. The disadvantage is that it is a bit expensive. Now there is a chip like this on Taobao The cheapest one costs more than ten yuan, which greatly increases the cost of my entire dot matrix clock, so I have to adopt this new clock chip solution, which is RX8025T. The cost is about one yuan. ## RX8025 chip introduction 1. Built-in high-stability 32.768KHz DTCXO (Digital Temperature Compensated Crystal Oscillator) 2. Supports high-speed mode (400K) of the I2C bus. 3. Timing alarm function (can be set: day, date, hour, minute) 4. Fixed period timing interrupt function. 5. Time update interrupt function. 6. 32.768KHz frequency output (with OE enable function) 7. Leap year automatic adjustment function. (2000 to 2099) 8. Wide range of interface voltage: 2.2V to 5.5V 9. Wide range of time holding voltage: 1.8V to 5.5V10. Low current power consumption: 0.8uA/3V (Typ.) ##### For more information on related documents, see the document below. If the document is invalid, please search on Baidu for the keyword ``RX-8025T Instructions for Use Summary``


[ RX-8025T Instructions Summary](http://www.doc88.com/p-339432284019.html) ## Circuit & PCB Design I have actually wanted to develop this ``RX8025T`` clock chip for a long time, but I had no choice but to find it on Taobao. There was no ready-made module, so I had to make one myself. Then I searched various schematic diagrams on Baidu and found that everyone's schematic diagrams were different, so I combined various schematic diagrams to make a rough schematic diagram and then drew it. A simple PCB board is put out to work on, so the schematic diagram is only for learning and reference. If anyone has a better solution, please point it out in the comment area. #### Lichuang Open Source Address [RX8025T module (with Arduino code)](https://oshwhub.com/lengff/rx8025t_module) #### RX8025T circuit schematic diagram![1.png] #### PCB- 3D preview picture![2.png] #### Finished product picture![rx8025t2.jpg] ## Arduino code At present, since I am only good at code processing of the ``Arduino`` platform, I only post ``Arduino`` ` code, if there are codes for other platforms later, they will be listed here. Since RX8025T mainly uses the I2C communication protocol, and Arduino’s implementation of I2C is relatively simple, the code is easy to understand. It’s more like transferring someone else’s code. , first I saw a piece of ``arduino~~~~`` code about ``8025`` on the Internet, and then combined it with the code of ``DS3231`` to sew out this piece of code. I personally think it can work. Used ``RX8025T`` code. The reference addresses are listed below: * DS3231 library source code address: [https://github.com/NorthernWidget/DS3231](https://github.com/NorthernWidget/DS3231) * RX8025 reference code address: [RX8025 library updated for IDE 1.0](https://forum.arduino.cc/t/rx8025-library-updated-for-ide-1-0/81805) * I2C communication protocol learning address: [RX-8025T Instructions Summary](http:/ /www.doc88.com/p-339432284019.html) ### The code is in the attachment ### Reference article [I2C Detailed Explanation] (%5Bhttps://www.cnblogs.com/sureZ-learning/p/15841281. html%5D(https://www.cnblogs.com/sureZ-learning/p/15841281.html))


[Taichi Maker-Arduino – Wire Library](%5Bhttp://www.taichi-maker.com/homepage /reference-index/arduino-library-index/wire-library/%5D(http://www.taichi-maker.com/homepage/reference-index/arduino-library-index/wire-library/))


[RX -8025T Instructions Summary](%5Bhttp://www.doc88.com/p-339432284019.html%5D(http://www.doc88.com/p-339432284019.html))


[[RX8025 library updated for IDE 1.0](%5Bhttps://forum.arduino.cc/t/rx8025-library-updated-for-ide-1-0/81805%5D(https://forum.arduino.cc/t/rx8025-library- updated-for-ide-1-0/81805))]([https://forum.arduino.cc/t/rx8025-library-updated-for-ide-1-0/81805/5](https:/ /forum.arduino.cc/t/rx8025-library-updated-for-ide-1-0/81805/5))