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changed from json to csv

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This commit is contained in:
Brian 2022-04-05 09:08:52 -06:00
parent 9c58357a4c
commit 0f080312ab
Signed by: brian
GPG Key ID: DE1A5390A3B84CD8
1 changed files with 22 additions and 54 deletions
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src/main.c
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@ -112,78 +112,44 @@ void print_sensor_data(struct bme280_data *sensor_readings_data)
#endif #endif
} }
int8_t save_data_to_json_file(struct bme280_data *sensor_readings_data) int8_t save_data_to_csv_file(struct bme280_data *sensor_readings_data)
{ {
time_t rawtime = time(NULL); time_t rawtime = time(NULL);
struct tm *timeinfo; struct tm *timeinfo;
char dateString[32]; char dateString[32];
char timeString[32]; char datetimeString[32];
char filename[100]; char filename[100];
char *jsonBuffer; FILE *csvFilePtr;
FILE *jsonFilePtr;
double fahrenheit; double celsius = sensor_readings_data->temperature;
double celsius; double fahrenheit = celsius_to_fahrenheit(sensor_readings_data->temperature);
double pascals; double pascals = sensor_readings_data->pressure;
double millibars; double millibars = pascals_to_mbar(sensor_readings_data->pressure);
double humidity; double humidity = sensor_readings_data->humidity;
struct json_object *parsed_json;
struct json_object *latest_reading_object = json_object_new_object();
struct json_object *temperature_object = json_object_new_object();
struct json_object *pressure_object = json_object_new_object();
timeinfo = localtime(&rawtime); timeinfo = localtime(&rawtime);
strftime(dateString, 32, "%F", timeinfo); strftime(dateString, 32, "%F", timeinfo);
strftime(timeString, 32, "%F_%H-%M-%S", timeinfo); strftime(datetimeString, 32, "%F %H:%M:%S", timeinfo);
snprintf(filename, sizeof(filename), "readings_%s.json", dateString); snprintf(filename, sizeof(filename), "/home/pi/readings/readings_%s.csv", dateString);
if (!check_file_exists(filename)) if (!check_file_exists(filename))
{ {
printf("File for today does not exist! Creating... \n"); printf("File for today does not exist! Creating... \n");
FILE *jsonFile = fopen(filename, "w"); FILE *csvFile = fopen(filename, "w");
fputs("{}", jsonFile); fputs("Date,Celsius,Fahrenheit,Pascals,Millibars,Humidity Percent\n", csvFile);
fclose(jsonFile); fclose(csvFile);
} }
jsonFilePtr = fopen(filename, "r"); csvFilePtr = fopen(filename, "a");
if (jsonFilePtr == NULL) if (csvFilePtr == NULL)
{
printf("Failed to open %s for reading...\n", filename);
exit(1);
}
jsonBuffer = parse_json_contents(jsonFilePtr, 10); // 10 as initial size
//fread(jsonBuffer, 1024, 1, jsonFilePtr);
fclose(jsonFilePtr);
parsed_json = json_tokener_parse(jsonBuffer);
fahrenheit = celsius_to_fahrenheit(sensor_readings_data->temperature);
celsius = sensor_readings_data->temperature;
pascals = sensor_readings_data->pressure;
millibars = pascals_to_mbar(sensor_readings_data->pressure);
humidity = sensor_readings_data->humidity;
json_object_object_add(temperature_object, "celsius", json_object_new_double(sensor_readings_data->temperature));
json_object_object_add(temperature_object, "fahrenheit", json_object_new_double(fahrenheit));
json_object_object_add(pressure_object, "pascals", json_object_new_double(sensor_readings_data->pressure));
json_object_object_add(pressure_object, "millibars", json_object_new_double(millibars));
json_object_object_add(latest_reading_object, "temperature", temperature_object);
json_object_object_add(latest_reading_object, "pressure", pressure_object);
json_object_object_add(latest_reading_object, "humidity_percent", json_object_new_double(humidity));
json_object_object_add(parsed_json, timeString, latest_reading_object);
jsonFilePtr = fopen(filename, "w");
if (jsonFilePtr == NULL)
{ {
printf("Failed to open %s for writing...\n", filename); printf("Failed to open %s for writing...\n", filename);
exit(1); exit(1);
} }
fputs(json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY), jsonFilePtr); fprintf(csvFilePtr, "%s,%0.5f,%0.5f,%0.5f,%0.5f,%0.5f\n", datetimeString, celsius, fahrenheit, pascals, millibars, humidity);
fclose(jsonFilePtr); fclose(csvFilePtr);
return 0; return 0;
} }
@ -209,7 +175,7 @@ int8_t read_sensor_data_normal_mode(struct bme280_dev *dev)
readings_result = bme280_set_sensor_mode(BME280_NORMAL_MODE, dev); readings_result = bme280_set_sensor_mode(BME280_NORMAL_MODE, dev);
readings_result = bme280_get_sensor_data(BME280_ALL, &sensor_readings_data, dev); readings_result = bme280_get_sensor_data(BME280_ALL, &sensor_readings_data, dev);
//print_sensor_data(&sensor_readings_data); //print_sensor_data(&sensor_readings_data);
save_data_to_json_file(&sensor_readings_data); save_data_to_csv_file(&sensor_readings_data);
return readings_result; return readings_result;
} }
@ -236,9 +202,11 @@ int main(int argc, char* argv[])
dev.delay_ms = user_delay_ms; dev.delay_ms = user_delay_ms;
init_result = bme280_init(&dev); init_result = bme280_init(&dev);
printf("\r\n BME280 Init Result is:%d \r\n", init_result); printf("\n\nBME280 Init Result is: %d\n\n", init_result);
read_sensor_data_normal_mode(&dev); read_sensor_data_normal_mode(&dev);
printf("Recorded readings.\n\n");
return 0; return 0;
} }