configuration saved to nvs

main/CMakeLists.txt

@@ -1,3 +1,3 @@
-idf_component_register(SRCS "power_profiler.c" "resistor_ranges.c" "measure.c" "ble.c" "gatt_svcs.c"
+idf_component_register(SRCS "power_profiler.c" "resistor_ranges.c" "measure.c" "ble.c" "gatt_svcs.c" "configuration.c"
                     INCLUDE_DIRS "."
                     REQUIRES "driver" "esp_adc" "bt" "nvs_flash")

main/configuration.c

@@ -0,0 +1,43 @@
+#include "esp_err.h"
+#include "nvs.h"
+
+#include "configuration.h"
+#include "power_profiler.h"
+
+void init_configuration_from_nvs(configuration* conf){
+  nvs_handle_t handle;
+  ESP_ERROR_CHECK(nvs_open("storage", NVS_READONLY, &handle));
+
+  nvs_get_u32(handle, "refresh_delay", &conf->refresh_delay);
+  nvs_get_u16(handle, "zero_c_nsamp", &conf->zero_cali_nsamp);
+  nvs_get_i32(handle, "range", &conf->range);
+  nvs_get_i32(handle, "auto_range", &conf->auto_range);
+
+  for(int i = 0; i < INPUTS_NUM; i++){
+    char key[16];
+    sprintf(key, "offset%d", i);
+    nvs_get_u32(handle, key, &conf->offsets[i]);
+  }
+
+  nvs_close(handle);
+}
+
+void save_configuration_to_nvs(configuration* conf){
+  nvs_handle_t handle;
+  ESP_ERROR_CHECK(nvs_open("storage", NVS_READWRITE, &handle));
+
+  nvs_set_u32(handle, "refresh_delay", conf->refresh_delay);
+  nvs_set_u16(handle, "zero_c_nsamp", conf->zero_cali_nsamp);
+  nvs_set_i32(handle, "range", conf->range);
+  nvs_set_i32(handle, "auto_range", conf->auto_range);
+  
+  for(int i = 0; i < INPUTS_NUM; i++){
+    char key[16];
+    sprintf(key, "offset%d", i);
+    nvs_set_u32(handle, key, conf->offsets[i]);
+  }
+
+  ESP_ERROR_CHECK(nvs_commit(handle));
+
+  nvs_close(handle);
+}

main/configuration.h

@@ -12,3 +12,6 @@ typedef struct {
   int range;
   int auto_range;
 } configuration;
+
+void init_configuration_from_nvs(configuration* conf);
+void save_configuration_to_nvs(configuration* conf);

main/gatt_svcs.c

@@ -10,6 +10,7 @@
 
 #include "gatt_svcs.h"
 #include "BLE_UUID.h"
+#include "configuration.h"
 
 static struct char_pres_format current_char_pres_format = {
   .format = FORMAT_UINT32,
@@ -139,6 +140,7 @@ int gatt_char_access_sampling_rate(uint16_t conn_handle, uint16_t attr_handle, s
       rc = gatt_svr_chr_write(ctxt->om, sizeof(data), sizeof(data), &data, NULL);
       ESP_LOGI("BLE", "Refresh rate : %lu", data);
       c_ctxt->conf->refresh_delay = data;
+      save_configuration_to_nvs(c_ctxt->conf);
     break;
     case BLE_GATT_ACCESS_OP_READ_DSC:
       rc = os_mbuf_append(ctxt->om, &refrsh_rate_char_pres_format, CHAR_PRESENTATION_FORMAT_SIZE);
@@ -158,12 +160,14 @@ int gatt_char_access_zeros_cali(uint16_t conn_handle, uint16_t attr_handle, stru
       switch (c_ctxt->handle){
         case ZEROS_CALI_ID:
           start_zero_cali(c_ctxt->meas_ctxt, c_ctxt->conf->zero_cali_nsamp, c_ctxt->conf->offsets);
+          save_configuration_to_nvs(c_ctxt->conf);
         break;
         case ZEROS_CALI_NSAMP_ID:
           ;
           uint16_t data;
           rc = gatt_svr_chr_write(ctxt->om, sizeof(data), sizeof(data), &data, NULL);
           c_ctxt->conf->zero_cali_nsamp = data;
+          save_configuration_to_nvs(c_ctxt->conf);
         break;
       }
     }
@@ -194,6 +198,7 @@ int gatt_char_access_range(uint16_t conn_handle, uint16_t attr_handle, struct bl
           uint8_t state;
           rc = gatt_svr_chr_write(ctxt->om, sizeof(state), sizeof(state), &state, NULL);
           c_ctxt->conf->auto_range = state;
+          save_configuration_to_nvs(c_ctxt->conf);
         break;
         case CURRENT_RANGE_ID:
           ;
@@ -202,6 +207,7 @@ int gatt_char_access_range(uint16_t conn_handle, uint16_t attr_handle, struct bl
           ESP_LOGI(TAG, "new range %d", data);
           c_ctxt->conf->range = data;
           activate_range(c_ctxt->conf->ranges, data, c_ctxt->conf->ranges_num - 1);
+          save_configuration_to_nvs(c_ctxt->conf);
         break;
       }
     }

main/power_profiler.c

@@ -142,6 +142,8 @@ void app_main(void){
 
   main_conf.offsets = offsets;
   
+  init_configuration_from_nvs(&main_conf);
+  
   uint32_t meas_volts[INPUTS_NUM];
   uint32_t meas_amp[INPUTS_NUM];
   measurements meas = {