Programmable alarm clock with light bulb dimmer.
| Hardware | Use | Communication |
|---|---|---|
| Push Button | Light On/Off Toggle | Digital Pin |
| Encoder / Rotary Button | Menu selection | Digital Pin (Interrupt) |
| LCD Screen | Menu | |
| NRF24L01 | Radio | SPI + 2 digital pins |
| DS1307 Real Time Clock | Clock | A4 and A5 pins. |
| Hardware | Use | Communication |
|---|---|---|
| Encoder / Rotary Button | Light Dimmer Selection | Digital Pin (Interrupt) |
| NRF24L01 | Radio | SPI + 2 digital pins |
| Pin on Radio Module | Pin on NRF24L01 Chip | Function | Arduino Pin |
|---|---|---|---|
| 1 | GND | Ground (GND) | 3V3 |
| 2 | 18 | 3.3V (VDD) | GND |
| 3 | 1 | Chip Enable (CE) | 9 |
| 4 | 2 | Chip Select NOT (CSN) | 10 |
| 5 | 3 | Serial Clock (SCK) | 13 |
| 6 | 4 | Master Out Slave In (MOSI) | 11 |
| 7 | 5 | Master In Slave Out (MISO) | 12 |
| 8 | 6 | IRQ | N/C |
https://learn.adafruit.com/adafruit-data-logger-shield/using-the-real-time-clock
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Bedside module transmit a data frame containing a serial instruction to Lightside module.
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Lightside module reply with a acknowledgement frame. (Handled by the Library)
Data frame
Format: D,[paylaod]/n
Example: D,1000/n
Payload value range from 0 to 1000 from no output to 100% (220V) output
Address
Reference
This tutorial is used: https://create.arduino.cc/projecthub/muhammad-aqib/nrf24l01-interfacing-with-arduino-wireless-communication-0c13d4
This library is used: https://github.com/nRF24/RF24
The library reference is here: http://tmrh20.github.io/RF24/classRF24.html
Code
02RadioExampleTest is used to test the radio in good condition. The round trip delay is about 1800 microseconds when no retry is needed.
https://create.arduino.cc/projecthub/Tittiamo/alarm-clock-f61bad