59. AT Command System via UART
Connect the potentiometer and LED to Arduino UNO as shown below.
Build a setup where the Arduino UNO takes action based on received AT-commands and prints its response on the Serial Monitor. (as shown in below table)
AT-command table
| Sr.No | AT Commands | Action | Response to command |
| 1. | AT | - | OK |
| 2. | AT+LED=ON | Turn ON LED | +LED:”ON” |
| 3. | AT+LED=OFF | Turn OFF LED | +LED:”OFF” |
| 4. | AT+SYS_ON_TIME? | The Arduino was powered on. | +SYS+ON+TIME:”HH:MM:SS” |
| 5. | AT+LED_STATUS? | Check LED is ON or OFF and respond | +LED_STATUS:”ON” or +LED_STATUS:”OFF” |
| 6. | AT+ADC_VALUE? | Read ADC value & respond | +ADC_VALUE: <value> range of <value> is 0 to 1023 (adc value) |
| 7. | AT+ADC_VOLTAGE? | Read Voltage on ADC pin and respond | +ADC_VOLTAGE: <value> range of <value> is 0 to 5 |