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- #include "bme280.h"
- #include "bme280_defs.h"
- #include "driver/i2c.h"
- #include <u8g2.h>
- #include "u8g2_esp32_hal.h"
- #include <esp_log.h>
- #include <esp_wifi.h>
- #include "freertos/event_groups.h"
- #include "nvs_flash.h"
- #include <esp_http_server.h>
- #include <sys/param.h>
-
- #define WIFI_SSID "Netzknecht"
- #define WIFI_PASS "***REMOVED***"
- #define WIFI_RETRIES 10
-
- static EventGroupHandle_t s_wifi_event_group;
- #define WIFI_CONNECTED_BIT BIT0
- #define WIFI_FAIL_BIT BIT1
-
- static const char *TAG = "wifi station";
- static int s_retry_num = 0;
-
- char cur_value_str[255];
-
- /* An HTTP GET handler */
- static esp_err_t hello_get_handler(httpd_req_t *req)
- {
- char* buf;
- size_t buf_len;
-
- /* Get header value string length and allocate memory for length + 1,
- * extra byte for null termination */
- buf_len = httpd_req_get_hdr_value_len(req, "Host") + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- /* Copy null terminated value string into buffer */
- if (httpd_req_get_hdr_value_str(req, "Host", buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found header => Host: %s", buf);
- }
- free(buf);
- }
-
- buf_len = httpd_req_get_hdr_value_len(req, "Test-Header-2") + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- if (httpd_req_get_hdr_value_str(req, "Test-Header-2", buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found header => Test-Header-2: %s", buf);
- }
- free(buf);
- }
-
- buf_len = httpd_req_get_hdr_value_len(req, "Test-Header-1") + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- if (httpd_req_get_hdr_value_str(req, "Test-Header-1", buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found header => Test-Header-1: %s", buf);
- }
- free(buf);
- }
-
- /* Read URL query string length and allocate memory for length + 1,
- * extra byte for null termination */
- buf_len = httpd_req_get_url_query_len(req) + 1;
- if (buf_len > 1) {
- buf = malloc(buf_len);
- if (httpd_req_get_url_query_str(req, buf, buf_len) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query => %s", buf);
- char param[32];
- /* Get value of expected key from query string */
- if (httpd_query_key_value(buf, "query1", param, sizeof(param)) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query parameter => query1=%s", param);
- }
- if (httpd_query_key_value(buf, "query3", param, sizeof(param)) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query parameter => query3=%s", param);
- }
- if (httpd_query_key_value(buf, "query2", param, sizeof(param)) == ESP_OK) {
- ESP_LOGI(TAG, "Found URL query parameter => query2=%s", param);
- }
- }
- free(buf);
- }
-
- /* Set some custom headers */
- httpd_resp_set_hdr(req, "Custom-Header-1", "Custom-Value-1");
- httpd_resp_set_hdr(req, "Custom-Header-2", "Custom-Value-2");
-
- /* Send response with custom headers and body set as the
- * string passed in user context*/
- const char* resp_str = cur_value_str;
- httpd_resp_send(req, resp_str, strlen(resp_str));
-
- /* After sending the HTTP response the old HTTP request
- * headers are lost. Check if HTTP request headers can be read now. */
- if (httpd_req_get_hdr_value_len(req, "Host") == 0) {
- ESP_LOGI(TAG, "Request headers lost");
- }
- return ESP_OK;
- }
-
- static httpd_uri_t hello = {
- .uri = "/hello",
- .method = HTTP_GET,
- .handler = hello_get_handler,
- /* Let's pass response string in user
- * context to demonstrate it's usage */
- .user_ctx = "Hello World!"
- };
-
- static httpd_handle_t start_webserver(void)
- {
- httpd_handle_t server = NULL;
- httpd_config_t config = HTTPD_DEFAULT_CONFIG();
-
- // Start the httpd server
- ESP_LOGI(TAG, "Starting server on port: '%d'", config.server_port);
- if (httpd_start(&server, &config) == ESP_OK) {
- // Set URI handlers
- ESP_LOGI(TAG, "Registering URI handlers");
- httpd_register_uri_handler(server, &hello);
- return server;
- }
-
- ESP_LOGI(TAG, "Error starting server!");
- return NULL;
- }
-
- static void stop_webserver(httpd_handle_t server)
- {
- // Stop the httpd server
- httpd_stop(server);
- }
-
- static void disconnect_handler(void* arg, esp_event_base_t event_base,
- int32_t event_id, void* event_data)
- {
- httpd_handle_t* server = (httpd_handle_t*) arg;
- if (*server) {
- ESP_LOGI(TAG, "Stopping webserver");
- stop_webserver(*server);
- *server = NULL;
- }
- }
-
- static void connect_handler(void* arg, esp_event_base_t event_base,
- int32_t event_id, void* event_data)
- {
- httpd_handle_t* server = (httpd_handle_t*) arg;
- if (*server == NULL) {
- ESP_LOGI(TAG, "Starting webserver");
- *server = start_webserver();
- }
- }
-
- static void event_handler(void* arg, esp_event_base_t event_base,
- int32_t event_id, void* event_data)
- {
- if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
- esp_wifi_connect();
- } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
- if (s_retry_num < WIFI_RETRIES) {
- esp_wifi_connect();
- s_retry_num++;
- ESP_LOGI(TAG, "retry to connect to the AP");
- } else {
- xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
- }
- ESP_LOGI(TAG,"connect to the AP fail");
- } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
- ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
- ESP_LOGI(TAG, "got ip:%s",
- ip4addr_ntoa(&event->ip_info.ip));
- s_retry_num = 0;
- xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
- }
- }
-
- void wifi_init_sta()
- {
- s_wifi_event_group = xEventGroupCreate();
-
- tcpip_adapter_init();
-
- ESP_ERROR_CHECK(esp_event_loop_create_default());
-
- wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
- ESP_ERROR_CHECK(esp_wifi_init(&cfg));
-
- //tcpip_adapter_dhcpc_stop(TCPIP_ADAPTER_IF_STA);
- //tcpip_adapter_ip_info_t info;
- //ip4_addr_t gw;
- //gw.addr = ipaddr_addr("192.168.0.1");
- //info.gw = gw;
- //ip4_addr_t ip;
- //ip.addr = ipaddr_addr("192.168.0.110");
- //info.ip = ip;
- //ip4_addr_t netmask;
- //netmask.addr = ipaddr_addr("255.255.255.0");
- //info.netmask = netmask;
- //tcpip_adapter_sta_start(0, &info);
-
- ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL));
- ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL));
-
- wifi_config_t wifi_config = {
- .sta = {
- .ssid = WIFI_SSID,
- .password = WIFI_PASS
- },
- };
- ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA) );
- ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config) );
- ESP_ERROR_CHECK(esp_wifi_start() );
-
- ESP_LOGI(TAG, "wifi_init_sta finished.");
-
- /* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
- * number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
- EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
- WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
- pdFALSE,
- pdFALSE,
- portMAX_DELAY);
-
- //tcpip_adapter_set_ip_info(TCPIP_ADAPTER_IF_STA, &info);
- /* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
- * happened. */
- if (bits & WIFI_CONNECTED_BIT) {
- ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",
- WIFI_SSID, WIFI_PASS);
- } else if (bits & WIFI_FAIL_BIT) {
- ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
- WIFI_SSID, WIFI_PASS);
- } else {
- ESP_LOGE(TAG, "UNEXPECTED EVENT");
- }
-
- ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler));
- ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler));
- vEventGroupDelete(s_wifi_event_group);
- }
-
- void i2c_setup()
- {
- printf("Setting up I�C driver on port 1... ");
- i2c_config_t config;
- config.mode = I2C_MODE_MASTER;
- config.sda_io_num = 33;
- config.sda_pullup_en = GPIO_PULLUP_ENABLE;
- config.scl_io_num = 32;
- config.scl_pullup_en = GPIO_PULLUP_ENABLE;
- config.master.clk_speed = 100000;
- i2c_param_config(I2C_NUM_0, &config);
- printf("Set driver parameters... ");
- esp_err_t err = i2c_driver_install(I2C_NUM_0, I2C_MODE_MASTER, 0, 0, 0);
- if (err == ESP_OK)
- printf("Driver installed!\n");
- else if (err == ESP_ERR_INVALID_ARG)
- printf("Driver install failed, invalid arguments!\n");
- else
- printf("Driver install failed!\n");
- }
-
- 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, 1);
- i2c_master_write_byte(cmd, reg_addr, 1);
- i2c_master_start(cmd);
- i2c_master_write_byte(cmd, dev_id << 1 | I2C_MASTER_READ, 1);
- 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);
- i2c_master_cmd_begin(I2C_NUM_0, cmd, 500 / portTICK_RATE_MS);
- i2c_cmd_link_delete(cmd);
- return 0;
- }
-
- int8_t i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
- //printf("Writing to bus: dev_id=%x, reg_addr=%x, data=%p, length=%u\n", dev_id, reg_addr, data, 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, 1);
- i2c_master_write_byte(cmd, reg_addr, 1);
- i2c_master_write(cmd, data, len, 1);
- i2c_master_stop(cmd);
- i2c_master_cmd_begin(I2C_NUM_0, cmd, 500 / portTICK_RATE_MS);
- i2c_cmd_link_delete(cmd);
- return 0;
- }
-
- void i2c_delay(uint32_t period) {
- vTaskDelay(period / portTICK_PERIOD_MS);
- }
-
- void i2c_shutdown()
- {
- printf("Shutting down I�C bus... ");
- esp_err_t err = i2c_driver_delete(I2C_NUM_0);
- if (err == ESP_ERR_INVALID_ARG)
- printf("Failed, invalid arguments!\n");
- else
- printf("Success!\n");
- }
-
- void read_sensor(struct bme280_dev* dev, int32_t* temp, uint32_t* pressure, uint32_t* humidity) {
-
- uint8_t settings_sel;
- uint32_t req_delay;
- struct bme280_data comp_data;
-
- dev->settings.osr_h = BME280_OVERSAMPLING_16X;
- dev->settings.osr_p = BME280_OVERSAMPLING_16X;
- dev->settings.osr_t = BME280_OVERSAMPLING_16X;
- dev->settings.filter = BME280_FILTER_COEFF_16;
-
- settings_sel = BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL | BME280_OSR_HUM_SEL | BME280_FILTER_SEL;
- bme280_set_sensor_settings(settings_sel, dev);
-
- req_delay = 12*bme280_cal_meas_delay(&(dev->settings));
-
- /* Continuously stream sensor data */
- bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
- /* Wait for the measurement to complete and print data @25Hz */
- dev->delay_ms(req_delay / portTICK_PERIOD_MS);
- bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
- *temp = comp_data.temperature;
- *pressure = comp_data.pressure;
- *humidity = comp_data.humidity;
- }
-
- void read_sensor2(struct bme280_dev* dev, int32_t* temp, uint32_t* pressure, uint32_t* humidity) {
-
- uint8_t settings_sel;
- uint32_t req_delay;
- struct bme280_data comp_data;
-
- dev->settings.osr_h = BME280_OVERSAMPLING_16X;
- dev->settings.osr_p = BME280_OVERSAMPLING_16X;
- dev->settings.osr_t = BME280_OVERSAMPLING_16X;
- dev->settings.filter = BME280_FILTER_COEFF_16;
-
- settings_sel = BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL | BME280_OSR_HUM_SEL | BME280_FILTER_SEL;
- bme280_set_sensor_settings(settings_sel, dev);
- /*Calculate the minimum delay required between consecutive measurement based upon the sensor enabled
- * and the oversampling configuration. */
- req_delay = 12*bme280_cal_meas_delay(&(dev->settings));
-
- bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
- /* Wait for the measurement to complete and print data @25Hz */
- dev->delay_ms(req_delay / portTICK_PERIOD_MS);
- bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
- *temp = comp_data.temperature;
- *pressure = comp_data.pressure;
- *humidity = comp_data.humidity;
- }
-
- void print_data(u8g2_t* u8g2, int32_t temp_raw, uint32_t pressure_raw, uint32_t humidity_raw,
- int32_t temp2_raw, uint32_t pressure2_raw, uint32_t humidity2_raw) {
- // Calc temperature pre and post comma values
- int32_t temp_pre = temp_raw / 100;
- int32_t temp_post = (abs(temp_raw) % 100) / 10;
- int32_t temp2_pre = temp2_raw / 100;
- int32_t temp2_post = (abs(temp2_raw) % 100) / 10;
-
- // Calc pressure values
- uint32_t press = pressure_raw / 100;
- uint32_t press2 = pressure2_raw / 100;
-
- // Calc humidity pre and post comma values
- uint32_t humid_pre = humidity_raw / 1024;
- uint32_t humid_post = (humidity_raw - humid_pre*1024) * 10 / 1024;
- uint32_t humid2_pre = humidity2_raw / 1024;
- uint32_t humid2_post = (humidity2_raw - humid2_pre*1024) * 10 / 1024;
-
- // Format temperatures
- char temp_str[2*(sizeof(int)*8+1)+5] = ""; // ""
- char temp_pre_str[sizeof(int)*8+1];
- itoa(temp_pre, temp_pre_str, 10);
- char temp_post_str[sizeof(int)*8+1];
- itoa(temp_post, temp_post_str, 10);
- char temp2_pre_str[sizeof(int)*8+1];
- itoa(temp2_pre, temp2_pre_str, 10);
- char temp2_post_str[sizeof(int)*8+1];
- itoa(temp2_post, temp2_post_str, 10);
- if (temp_pre < 10)
- strcat(temp_str, " "); // Add space if first temperatur is just one digit long " "
- strcat(temp_str, temp_pre_str); // " 1"
- strcat(temp_str, ","); // " 1,"
- strcat(temp_str, temp_post_str); // " 1,3"
- strcat(temp_str, " "); // " 1,3 "
- if (temp2_pre >= 0)
- strcat(temp_str, " "); // Add space if there is no minus sign " 1,3 "
- if (temp2_pre < 10)
- strcat(temp_str, " "); // Add space if second temperatur is just one digit long " 1,3 "
- strcat(temp_str, temp2_pre_str); // " 1,3 7"
- strcat(temp_str, ","); // " 1,3 7,"
- strcat(temp_str, temp2_post_str); // " 1,3 7,2"
- strcat(temp_str, " �C"); // " 1,3 7,2 �C"
-
- // Format temperatures
- char humid_str[2*(sizeof(int)*8+1)+5] = ""; // ""
- char humid_pre_str[sizeof(int)*8+1];
- itoa(humid_pre, humid_pre_str, 10);
- char humid_post_str[sizeof(int)*8+1];
- itoa(humid_post, humid_post_str, 10);
- char humid2_pre_str[sizeof(int)*8+1];
- itoa(humid2_pre, humid2_pre_str, 10);
- char humid2_post_str[sizeof(int)*8+1];
- itoa(humid2_post, humid2_post_str, 10);
- strcat(humid_str, humid_pre_str); // "12"
- strcat(humid_str, ","); // "12,"
- strcat(humid_str, humid_post_str); // "12,5"
- strcat(humid_str, " "); // "12,5 "
- strcat(humid_str, humid2_pre_str); // "12,5 45"
- strcat(humid_str, ","); // "12,5 45,"
- strcat(humid_str, humid2_post_str); // "12,5 45,23"
- strcat(humid_str, " %"); // "12,5 45,23 %"
-
- // Format pressure
- char pressure_str[2*(sizeof(int)*8+1)+5] = ""; // ""
- char press1_str[sizeof(int)*8+1];
- itoa(press, press1_str, 10);
- char press2_str[sizeof(int)*8+1];
- itoa(press2, press2_str, 10);
- if (press < 1000)
- strcat(pressure_str, " ");
- strcat(pressure_str, press1_str);
- strcat(pressure_str, " ");
- if (press2 < 1000)
- strcat(pressure_str, " ");
- strcat(pressure_str, press2_str);
- strcat(pressure_str, " hPa");
-
- u8g2_ClearBuffer(u8g2);
- u8g2_SetFont(u8g2, u8g2_font_profont17_mf);
- int8_t fontheight = u8g2_GetAscent(u8g2);
- int8_t fontmargin = abs(u8g2_GetDescent(u8g2))+2;
- u8g2_DrawStr(u8g2, 0, fontheight, " IN OUT ");
- u8g2_DrawStr(u8g2, 0, 2*fontheight + fontmargin, temp_str);
- u8g2_DrawStr(u8g2, 0, 3*fontheight + 2*fontmargin, humid_str);
- u8g2_DrawStr(u8g2, 0, 4*fontheight + 3*fontmargin, pressure_str);
- u8g2_SendBuffer(u8g2);
- }
-
- void app_main(void)
- {
- int32_t temp = 0;
- uint32_t pressure = 0;
- uint32_t humidity = 0;
- int32_t temp2 = 0;
- uint32_t pressure2 = 0;
- uint32_t humidity2 = 0;
-
- // INIT SENSOR
- i2c_setup();
- struct bme280_dev dev;
- dev.dev_id = 0x76;
- dev.intf = BME280_I2C_INTF;
- dev.read = i2c_read;
- dev.write = i2c_write;
- dev.delay_ms = i2c_delay;
- bme280_init(&dev);
-
- // INIT SENSOR2
- struct bme280_dev dev2;
- dev2.dev_id = 0x77;
- dev2.intf = BME280_I2C_INTF;
- dev2.read = i2c_read;
- dev2.write = i2c_write;
- dev2.delay_ms = i2c_delay;
- bme280_init(&dev2);
-
- // INIT DISPLAY
- u8g2_esp32_hal_t u8g2_esp32_hal = U8G2_ESP32_HAL_DEFAULT;
- u8g2_esp32_hal.sda = 18;
- u8g2_esp32_hal.scl = 19;
-
- u8g2_esp32_hal_init(u8g2_esp32_hal);
- u8g2_t u8g2;
- u8g2_Setup_ssd1306_i2c_128x64_vcomh0_f(&u8g2, U8G2_R0, u8g2_esp32_i2c_byte_cb,
- u8g2_esp32_gpio_and_delay_cb);
- u8x8_SetI2CAddress(&u8g2.u8x8,0x3C << 1);
- u8g2_InitDisplay(&u8g2); // send init sequence to the display, display is in sleep mode after this,
- u8g2_SetPowerSave(&u8g2, 0); // wake up display
-
- // INIT WIFI
- //Initialize NVS
- esp_err_t ret = nvs_flash_init();
- if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
- ESP_ERROR_CHECK(nvs_flash_erase());
- ret = nvs_flash_init();
- }
- ESP_ERROR_CHECK(ret);
-
- ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
- wifi_init_sta();
-
- // INIT WEBSERVER
- static httpd_handle_t server = NULL;
- ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &connect_handler, &server));
- ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_DISCONNECTED, &disconnect_handler, &server));
- server = start_webserver();
-
- while (1) {
- read_sensor(&dev, &temp, &pressure, &humidity);
- read_sensor(&dev2, &temp2, &pressure2, &humidity2);
- printf("%i �c, %i hPa, %i %%\r\n", temp, pressure, humidity);
- printf("%i �c, %i hPa, %i %%\r\n", temp2, pressure2, humidity2);
- print_data(&u8g2, temp, pressure, humidity, temp2, pressure2, humidity2);
- vTaskDelay(250 / portTICK_PERIOD_MS);
- }
- }
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