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Added simple HTTP Server 

Rewrote print_data function
Fixed multiple sensor usage on one I2C bus
master
Christian Loch 4 years ago
parent
15051a0aca
commit
d251eb6358
1 changed files with 378 additions and 85 deletions
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  1. +378
    -85
      main/main.c

+ 378
- 85
main/main.c View File

@@ -4,16 +4,250 @@
#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 I²C driver... ");
//i2c_driver_install(0, I2C_MODE_MASTER, 0, 0, 0);
printf("Setting up I�C driver on port 1... ");
i2c_config_t config;
config.mode = I2C_MODE_MASTER;
config.sda_io_num = 18;
config.sda_io_num = 33;
config.sda_pullup_en = GPIO_PULLUP_ENABLE;
config.scl_io_num = 19;
config.scl_io_num = 32;
config.scl_pullup_en = GPIO_PULLUP_ENABLE;
config.master.clk_speed = 100000;
i2c_param_config(I2C_NUM_0, &config);
@@ -27,34 +261,6 @@ void i2c_setup()
printf("Driver install failed!\n");
}

void i2c_detect()
{
printf("Scanning I²C bus:\n");
uint8_t address;
printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\r\n");
for (int i = 0; i < 128; i += 16) {
printf("%02x: ", i);
for (int j = 0; j < 16; j++) {
fflush(stdout);
address = i + j;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, 0x1);
i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(I2C_NUM_0, cmd, 50 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
if (ret == ESP_OK) {
printf("%02x ", address);
} else if (ret == ESP_ERR_TIMEOUT) {
printf("UU ");
} else {
printf("-- ");
}
}
printf("\r\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);
@@ -91,7 +297,7 @@ void i2c_delay(uint32_t period) {

void i2c_shutdown()
{
printf("Shutting down I²C bus... ");
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");
@@ -105,8 +311,33 @@ void read_sensor(struct bme280_dev* dev, int32_t* temp, uint32_t* pressure, uint
uint32_t req_delay;
struct bme280_data comp_data;

/* Recommended mode of operation: Indoor navigation */
dev->settings.osr_h = BME280_OVERSAMPLING_1X;
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;
@@ -116,9 +347,7 @@ void read_sensor(struct bme280_dev* dev, int32_t* temp, uint32_t* pressure, uint
/*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));
printf("req_delay=%i\r\n", req_delay);

/* 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);
@@ -128,59 +357,91 @@ void read_sensor(struct bme280_dev* dev, int32_t* temp, uint32_t* pressure, uint
*humidity = comp_data.humidity;
}

void print_data(u8g2_t* u8g2, int32_t temp, uint32_t pressure, uint32_t humidity) {
int32_t temp1 = temp / 100;
int32_t temp2 = (abs(temp) % 100) / 10;
uint32_t press1 = pressure / 100;
uint32_t humid1 = humidity / 1024;
uint32_t humid2 = (humidity - humid1*1024) * 10 / 1024;
//temp1 = 12;
//temp2 = 3;
int32_t temp3 = -1*temp1;
int32_t temp4 = temp2;
//press1 = 9999;
//humid1 = 13;
//humid2 = 4;
char temp1str[31];
char temp1str2[32];
sprintf(temp1str, "%d,%d", temp1, temp2);
if (temp1 < 10) {
sprintf(temp1str2, " %s", temp1str);
} else {
sprintf(temp1str2, "%s", temp1str);
}
char temp2str[31];
char temp2str2[33];
sprintf(temp2str, "%d,%d", temp3, temp4);
uint8_t spaces = 0;
if (temp3 > 0)
spaces++;
if (abs(temp3) < 10)
spaces++;
if (spaces == 2)
sprintf(temp2str2, " %s", temp2str);
else if (spaces == 1)
sprintf(temp2str2, " %s", temp2str);
else {
sprintf(temp2str2, "%s", temp2str);
}
char tempstr[70];
sprintf(tempstr, "%s %s °C", temp1str2, temp2str2);
u8g2_ClearBuffer(u8g2);
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;

char pressstr[27];
char humidstr[27];
// 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"

sprintf(pressstr, "%d %d hPa", press1, press1);
sprintf(humidstr, "%d,%d %d,%d %%", humid1, humid2, humid1, humid2);
// 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, tempstr);
u8g2_DrawStr(u8g2, 0, 3*fontheight + 2*fontmargin, humidstr);
u8g2_DrawStr(u8g2, 0, 4*fontheight + 3*fontmargin, pressstr);
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);
}

@@ -189,6 +450,9 @@ 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();
@@ -200,6 +464,15 @@ void app_main(void)
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;
@@ -213,10 +486,30 @@ void app_main(void)
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);
printf("%i °c, %i hPa, %i %%\r\n", temp, pressure, humidity);
print_data(&u8g2, 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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