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esp32 temperature node

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Alex B.
2025-10-04 02:29:59 -04:00
parent 3cbab77801
commit 2de63b1389
1 changed files with 3 additions and 91 deletions
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94
ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
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@@ -26,108 +26,20 @@
*/
#include <stdio.h>
#include "esp_log.h"
#include "driver/i2c.h"
#include "i2c_bus.h"
#include "bme280.h"
static const char *TAG = "i2c-simple-example";
#define I2C_MASTER_SCL_IO 21 /*!< GPIO number used for I2C master clock */
#define I2C_MASTER_SDA_IO 22 /*!< GPIO number used for I2C master data */
#define I2C_MASTER_NUM I2C_NUM_0 /*!< I2C master i2c port number, the number of i2c peripheral interfaces available will depend on the chip */
#define I2C_MASTER_FREQ_HZ 400000 /*!< I2C master clock frequency */
#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
#define I2C_MASTER_TIMEOUT_MS 1000
#define I2C_ACKS 0x1
#define I2C_ACKM 0x0
#define I2C_NOACKM 0x1 // I2C NACK value
#define I2C_WRITE_BIT I2C_MASTER_WRITE
#define I2C_READ_BIT I2C_MASTER_READ
#define MPU9250_SENSOR_ADDR 0x76 /*!< Slave address of the MPU9250 sensor */
#define MPU9250_WHO_AM_I_REG_ADDR 0xD0 /*!< Register addresses of the "who am I" register */
#define MPU9250_PWR_MGMT_1_REG_ADDR 0x88 /*!< Register addresses of the power managment register */
#define MPU9250_RESET_BIT 7
/**
* @brief Read a sequence of bytes from a MPU9250 sensor registers
*/
static esp_err_t mpu9250_register_read(uint8_t reg_addr, uint8_t *data, size_t len)
{
return i2c_master_write_read_device(I2C_MASTER_NUM, MPU9250_SENSOR_ADDR, &reg_addr, 1, data, len, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
}
/*static esp_err_t bme280_I2C_burst_read(uint8_t device_address, uint8_t register_address, uint8_t *registers_data, size_t count)
{
int command_result = 0;
//unsigned char array[BME280_I2C_BUFFER_LEN];
unsigned char pos;
array[0] = register_address;
command_result = i2c_master_write_read_device(0, device_address, write_buffer, write_size, *array, read_size, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
//error = i2c_master_write_read_device(I2C_MASTER_NUM, MPU9250_SENSOR_ADDR, &register_address, 1, registers_data, count, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
}*/
static esp_err_t bme280_read_raw_temperature(uint8_t device_address, uint8_t *raw_temperature) {
// BME280_INIT_VALUE LN 136
// BME280_TEMPERATURE_MSB_REG 0xFA
// BME280_TEMPERATURE_DATA_LENGTH
// BME280_TEMPERATURE_DATA_SIZE
// I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS
esp_err_t command_result;
//unsigned char raw_temperature[BME280_TEMPERATURE_DATA_SIZE] = {0, 0, 0};
//command_result = i2c_master_read_from_device(0, BME280_I2C_ADDRESS1, *raw_temperature, BME280_TEMPERATURE_DATA_SIZE, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
command_result = i2c_master_write_read_device(0, device_address, *raw_temperature, BME280_TEMPERATURE_DATA_SIZE, BME280_TEMPERATURE_REGISTER, 1, I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
return command_result;
}
/**
* @brief Write a byte to a MPU9250 sensor register
*/
static esp_err_t mpu9250_register_write_byte(uint8_t reg_addr, uint8_t data)
{
int ret;
uint8_t write_buf[2] = {reg_addr, data};
ret = i2c_master_write_to_device(I2C_MASTER_NUM, MPU9250_SENSOR_ADDR, write_buf, sizeof(write_buf), I2C_MASTER_TIMEOUT_MS / portTICK_PERIOD_MS);
return ret;
}
/**
* @brief i2c master initialization
static esp_err_t i2c_master_init(void)
{
int i2c_master_port = I2C_MASTER_NUM;
i2c_config_t conf = {
.mode = I2C_MODE_MASTER,
.sda_io_num = I2C_MASTER_SDA_IO,
.scl_io_num = I2C_MASTER_SCL_IO,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = I2C_MASTER_FREQ_HZ,
};
i2c_param_config(i2c_master_port, &conf);
return i2c_driver_install(i2c_master_port, conf.mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
}*/
/**
* @brief Initialize ESP32 as an I2C master device
*/
static esp_err_t i2c_driver_initialize(void)
{
int i2c_master_port = 0;
i2c_config_t conf = {
.mode = I2C_MODE_MASTER,
.sda_io_num = GPIO_NUM_21,
.sda_io_num = 21,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_io_num = GPIO_NUM_22,
.scl_io_num = 22,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = I2C_MASTER_FREQ_HZ,
.clk_flags= 0,