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AUTOMATED SMS CALLS USING VSDSQUADRON MINI and SIM800L MODULE

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VSDSQUADRON MINI and SIM800L Pin Connections

VSDSQUADRON MINI Pin Description:

  1. 5V: Power supply pin that provides 5V to the connected module.
  2. GND: Ground pin for common ground reference.
  3. PA10: General-purpose I/O pin, used as the TX (Transmit) pin for UART communication.
  4. PA9: General-purpose I/O pin, used as the RX (Receive) pin for UART communication.

SIM800L Pin Description:

  1. VCC: Power input pin for the SIM800L module, typically requires 3.7-4.2V but is connected to the 5V pin of VSDSQUADRON MINI in this case.
  2. GND: Ground pin, connected to the common ground.
  3. TXD: Transmit pin for UART communication, connected to PA10 of the VSDSQUADRON MINI.
  4. RXD: Receive pin for UART communication, connected to PA9 of the VSDSQUADRON MINI.

Code Implementation:

The provided code initializes the VSDSQUADRON MINI microcontroller and communicates with the SIM800L GSM module to send an SMS.

  1. Includes and Defines:

    • #include <ch32v00x.h>: Includes the header file for the VSDSQUADRON MINI microcontroller.
    • #include <debug.h>: Includes the debug header for debugging purposes.
    • #define SIM800L_UART USART1: Defines the UART port used for communication with the SIM800L.
    • #define SIM800L_BAUDRATE 9600: Defines the baud rate for UART communication.

  2. Delay Functions:

    • void Delay_Init(void): Initializes delay functions (implementation needed if required).
    • void Delay_Ms(uint32_t n): Delays for n milliseconds by executing a loop.

  3. USART Initialization and Communication Functions:

    • void USART_Printf_Init(uint32_t baudrate): Initializes the USART peripheral with the specified baud rate.
    • void USART_SendString(USART_TypeDef* USARTx, char* str): Sends a string over the specified USART.

  4. Setup Function:

    • Initializes the system clock and delay functions.
    • Configures the USART for communication with the SIM800L.
    • Sends AT commands to the SIM800L to send an SMS to the specified phone number.

  5. Main Function:

    • Calls the setup() function and enters an infinite loop.

Connections Summary:

+-----------------+      +----------+
| VSDSQUADRON MINI|      | SIM800L  |
|                 |      |          |
|              5V |------| VCC      |
|             GND |------| GND      |
|             PA10|------| TXD      |
|             PA9 |------| RXD      |
+-----------------+      +----------+

Usage:

  • Connect the pins of the VSDSQUADRON MINI to the SIM800L as described.
  • Enter the phone number to which the SMS or call.
  • Compile and upload the code to the VSDSQUADRON MINI microcontroller.