medical_beauty_photography/main/ble_uart.c

#include "ble_uart.h"
#define buffer_size 1024
uint8_t data[128];
int length = 0;

void ble_uart_init(uart_port_t uart_num, int tx_io_num, int rx_io_num) {
  uart_config_t uart_config = {
      .baud_rate = 115200,
      .data_bits = UART_DATA_8_BITS,
      .parity = UART_PARITY_DISABLE,
      .stop_bits = UART_STOP_BITS_1,
      .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
      .source_clk = UART_SCLK_APB,
  };
  ESP_ERROR_CHECK(uart_driver_install(uart_num, buffer_size * 2, 0, 0, NULL, 0));

  ESP_ERROR_CHECK(uart_param_config(uart_num, &uart_config));

  ESP_ERROR_CHECK(uart_set_pin(uart_num, tx_io_num, rx_io_num, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));
}

void ble_receive(uart_port_t uart_num) {
  ESP_ERROR_CHECK(uart_get_buffered_data_len(uart_num, (size_t*)&length));
  if (length != 0) {
    length = uart_read_bytes(uart_num, data, length, 100);
  }
}