playground/ESP8266
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

init

Browse source
This commit is contained in:
Artur Gurgul 2025-09-16 07:23:00 -05:00
commit 71381bb467
10 changed files with 3878 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

129
main/bme680_esp8266.c Normal file
View file

@ -0,0 +1,129 @@
// #include <stdio.h>
// void app_main(void)
// {
// }
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/i2c.h"
#include "bme680.h"
#define I2C_PORT I2C_NUM_0
#define I2C_SDA_PIN 0 // GPIO0
#define I2C_SCL_PIN 2 // GPIO2
#define I2C_FREQ_HZ 100000
#define BME680_ADDR BME680_I2C_ADDR_PRIMARY // 0x76 (SDO=GND)
// #define BME680_ADDR BME680_I2C_ADDR_SECONDARY // 0x77 (SDO=VCC)
// --- I2C helpers (ESP-IDF style) ---
static int8_t i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev_id << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(cmd, reg_addr, true);
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev_id << 1) | I2C_MASTER_READ, true);
if (len > 1) {
i2c_master_read(cmd, data, len - 1, I2C_MASTER_ACK);
}
i2c_master_read_byte(cmd, data + len - 1, I2C_MASTER_NACK);
i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(I2C_PORT, cmd, pdMS_TO_TICKS(1000));
i2c_cmd_link_delete(cmd);
return (ret == ESP_OK) ? BME680_OK : BME680_E_COM_FAIL;
}
static int8_t i2c_write(uint8_t dev_id, uint8_t reg_addr, const uint8_t *data, uint16_t len) {
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev_id << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(cmd, reg_addr, true);
i2c_master_write(cmd, (uint8_t*)data, len, true);
i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(I2C_PORT, cmd, pdMS_TO_TICKS(1000));
i2c_cmd_link_delete(cmd);
return (ret == ESP_OK) ? BME680_OK : BME680_E_COM_FAIL;
}
static void delay_ms(uint32_t period_ms) { vTaskDelay(pdMS_TO_TICKS(period_ms)); }
static void i2c_init(void) {
i2c_config_t conf = {
.mode = I2C_MODE_MASTER,
.sda_io_num = I2C_SDA_PIN,
.scl_io_num = I2C_SCL_PIN,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = I2C_FREQ_HZ,
};
i2c_param_config(I2C_PORT, &conf);
i2c_driver_install(I2C_PORT, conf.mode, 0, 0, 0);
}
void app_main(void) {
i2c_init();
struct bme680_dev dev = {0};
dev.dev_id = BME680_ADDR;
dev.intf = BME680_I2C_INTF;
dev.read = i2c_read;
dev.write = i2c_write;
dev.delay_ms = delay_ms;
if (bme680_init(&dev) != BME680_OK) {
printf("BME680 init failed\n");
return;
}
// Oversampling / filter
dev.tph_sett.os_hum = BME680_OS_2X;
dev.tph_sett.os_pres = BME680_OS_4X;
dev.tph_sett.os_temp = BME680_OS_8X;
dev.tph_sett.filter = BME680_FILTER_SIZE_3;
// Gas sensor
dev.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
dev.gas_sett.heatr_temp = 320; // °C
dev.gas_sett.heatr_dur = 150; // ms
uint8_t set_required_settings = BME680_OST_SEL | BME680_OSP_SEL |
BME680_OSH_SEL | BME680_FILTER_SEL |
BME680_GAS_SENSOR_SEL;
if (bme680_set_sensor_settings(set_required_settings, &dev) != BME680_OK) {
printf("Sensor settings failed\n");
return;
}
while (1) {
// Force mode, one-shot
if (bme680_set_sensor_mode(&dev) != BME680_OK) {
printf("Set mode failed\n");
vTaskDelay(pdMS_TO_TICKS(1000));
continue;
}
// Wait for measurement time
uint16_t meas_period;
bme680_get_profile_dur(&meas_period, &dev);
vTaskDelay(pdMS_TO_TICKS(meas_period));
struct bme680_field_data data;
if (bme680_get_sensor_data(&data, &dev) == BME680_OK) {
printf("T=%.2f °C RH=%.2f %% P=%.2f hPa Gas=%.2f kΩ\n",
data.temperature / 100.0f,
data.humidity / 1000.0f,
data.pressure / 100.0f,
data.gas_resistance / 1000.0f);
} else {
printf("Read failed\n");
}
vTaskDelay(pdMS_TO_TICKS(2000));
}
}