brian/temperatureRecorder
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jsontest will append as expected, bin/Debug/tempRecord doesn't

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This commit is contained in:
Brian 2022-04-04 15:19:18 -06:00
parent 892fcfca6c
commit 9c58357a4c
Signed by: brian
GPG Key ID: DE1A5390A3B84CD8
3 changed files with 155 additions and 56 deletions
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2
Makefile
View File

@ -19,4 +19,6 @@ release:
.PHONY clean:
rm -rf -v !\(.gitignore\) $(DEBUG_DIR)/*
rm -rf -v !\(.gitignore\) $(BIN_DEBUG_DIR)/*
rm -rf -v !\(.gitignore\) $(RELEASE_DIR)/*
rm -rf -v !\(.gitignore\) $(BIN_RELEASE_DIR)/*

100
src/jsontest.c Normal file
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@ -0,0 +1,100 @@
/**
*
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <fcntl.h>
#include <time.h>
#include <json-c/json_object.h>
#include <json-c/json_tokener.h>
int8_t check_file_exists(const char *filename)
{
FILE *file;
file = fopen(filename, "r");
if (file != NULL)
{
fclose(file);
return 1;
}
return 0;
}
int main(int argc, char* argv[])
{
time_t rawtime = time(NULL);
struct tm *timeinfo;
char dateString[32];
char timeString[32];
char filename[100];
char jsonBuffer[1024];
//char jsonStrOutput[4096];
FILE *jsonFilePtr;
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);
strftime(dateString, 32, "%F", timeinfo);
strftime(timeString, 32, "%F_%H-%M-%S", timeinfo);
snprintf(filename, sizeof(filename), "readings_%s.json", dateString);
if (!check_file_exists(filename))
{
printf("File for today does not exist! Creating...\n");
FILE *jsonFile = fopen(filename, "w");
fputs("{}", jsonFile);
fclose(jsonFile);
}
jsonFilePtr = fopen(filename, "r");
if (jsonFilePtr == NULL)
{
printf("Failed to open %s for reading...\n", filename);
exit(1);
}
fread(jsonBuffer, 1024, 1, jsonFilePtr);
fclose(jsonFilePtr);
printf("raw json read in: %s\n", jsonBuffer);
parsed_json = json_tokener_parse(jsonBuffer);
printf("json read in: %s\n", json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY));
double fahrenheit = (23 * 1.8) + 32;
double humidity = 100 - 80.82;
json_object_object_add(temperature_object, "fahrenheit", json_object_new_double(fahrenheit));
json_object_object_add(latest_reading_object, "temperature", temperature_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);
printf("json to write out: %s\n", json_object_to_json_string_ext(latest_reading_object, JSON_C_TO_STRING_PRETTY));
printf("new json to write out: %s\n", json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY));
//uint32_t jsonStrSize = sizeof(json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY));
//printf("jsonStrSize %i\n", jsonStrSize);
//char jsonStrOutput[] = json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY);
jsonFilePtr = fopen(filename, "w");
if (jsonFilePtr == NULL)
{
printf("Failed to open %s for writing...\n", filename);
exit(1);
}
fputs(json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY), jsonFilePtr);
//fwrite(json_object_to_json_string_ext(parsed_json), 1, jsonStrSize, jsonFilePtr);
fclose(jsonFilePtr);
return 0;
}

109
src/main.c
View File

@ -38,7 +38,6 @@ void user_delay_ms(uint32_t period)
usleep(period*1000);
}
#ifdef BME280_FLOAT_ENABLE
double celsius_to_fahrenheit(double celsius)
{
return (celsius * 1.8) + 32;
@ -48,17 +47,33 @@ double pascals_to_mbar(double pascals)
{
return pascals / 100;
}
#else
uint32_t celsius_to_fahrenheit(uint32_t celsius)
{
return (celsius * 1.8) + 32;
}
uint32_t pascals_to_mbar(uint32_t pascals)
char *parse_json_contents(FILE* filePtr, size_t size)
{
return pascals / 100;
char *str;
int ch;
size_t len = 0;
str = realloc(NULL, sizeof(*str)*size);
if (!str) {
return str;
}
while (EOF != (ch = fgetc(filePtr)) && ch != '\n')
{
str[len++] = ch;
if (len == size)
{
str = realloc(str, sizeof(*str)*(size += 16)); // not sure why 16, was in example
if (!str) {
return str;
}
}
}
str[len++] = '\0'; // ??? append a null character?
return realloc(str, sizeof(*str)*len);
}
#endif
int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{
@ -104,9 +119,15 @@ int8_t save_data_to_json_file(struct bme280_data *sensor_readings_data)
char dateString[32];
char timeString[32];
char filename[100];
char jsonBuffer[1024];
char *jsonBuffer;
FILE *jsonFilePtr;
double fahrenheit;
double celsius;
double pascals;
double millibars;
double 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();
@ -114,9 +135,7 @@ int8_t save_data_to_json_file(struct bme280_data *sensor_readings_data)
timeinfo = localtime(&rawtime);
strftime(dateString, 32, "%F", timeinfo);
strftime(timeString, 32, "%H_%M_%S", timeinfo);
//puts(dateString);
//time(&rawtime);
strftime(timeString, 32, "%F_%H-%M-%S", timeinfo);
snprintf(filename, sizeof(filename), "readings_%s.json", dateString);
@ -128,64 +147,42 @@ int8_t save_data_to_json_file(struct bme280_data *sensor_readings_data)
fclose(jsonFile);
}
jsonFilePtr = fopen(filename, "r+");
jsonFilePtr = fopen(filename, "r");
if (jsonFilePtr == NULL)
{
sprintf("Failed to open %s", filename);
printf("Failed to open %s for reading...\n", filename);
exit(1);
}
fread(jsonBuffer, 1024, 1, jsonFilePtr);
//printf("raw json read in: %s \n", jsonBuffer);
jsonBuffer = parse_json_contents(jsonFilePtr, 10); // 10 as initial size
//fread(jsonBuffer, 1024, 1, jsonFilePtr);
fclose(jsonFilePtr);
parsed_json = json_tokener_parse(jsonBuffer);
//printf("json read in: %s \n", json_object_to_json_string(parsed_json));
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;
#ifdef BME280_FLOAT_ENABLE
double fahrenheit = celsius_to_fahrenheit(sensor_readings_data->temperature);
double celsius = sensor_readings_data->temperature;
double pascals = sensor_readings_data->pressure;
double millibars = pascals_to_mbar(sensor_readings_data->pressure);
double humidity = sensor_readings_data->humidity;
json_object_object_add(temperature_object, "celsius", json_object_new_double(celsius));
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(pascals));
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);
//fprintf(jsonFilePtr, "{\"temperature\":{\"celsius\":%0.2f,\"fahrenheit\":%0.2f}}", celsius, fahrenheit);
#else
uint32_t fahrenheit = celsius_to_fahrenheit(sensor_readings_data->temperature);
uint32_t celsius = sensor_readings_data->temperature;
uint32_t pascals = sensor_readings_data->pressure;
uint32_t millibars = pascals_to_mbar(sensor_readings_data->pressure);
uint32_t humidity = sensor_readings_data->humidity;
json_object_object_add(temperature_object, "celsius", json_object_new_int(celsius));
json_object_object_add(temperature_object, "fahrenheit", json_object_new_int(fahrenheit));
json_object_object_add(pressure_object, "pascals", json_object_new_int(pascals));
json_object_object_add(pressure_object, "millibars", json_object_new_int(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_int(humidity));
//json_object_object_add(parsed_json, "timeString", latest_reading_object);
//fprintf(jsonFilePtr, "{\"temperature\":{\"celsius\":%ld,\"fahrenheit\":%ld}}", celsius, fahrenheit);
#endif
json_object_object_add(parsed_json, timeString, latest_reading_object);
//fprintf(jsonFilePtr, json_object_to_json_string(parsed_json));
fputs(json_object_to_json_string(parsed_json), jsonFilePtr);
printf("json to write out: %s \n", json_object_to_json_string(latest_reading_object));
printf("new json to write out: %s \n", json_object_to_json_string(parsed_json));
jsonFilePtr = fopen(filename, "w");
if (jsonFilePtr == NULL)
{
printf("Failed to open %s for writing...\n", filename);
exit(1);
}
fputs(json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY), jsonFilePtr);
fclose(jsonFilePtr);
return 0;
}