diff --git a/main/co2_sensor.c b/main/co2_sensor.c
index c3f8f19..c1f4465 100644
--- a/main/co2_sensor.c
+++ b/main/co2_sensor.c
@@ -69,7 +69,7 @@ void co2_restart(bool restore_calib) {
     ESP_LOGI(TAG, "Restarting CO2 sensor");
 
     gpio_set_level(CONFIG_PIN_CO2_EN, 0);
-    vTaskDelay(pdMS_TO_TICKS(100));
+    vTaskDelay(pdMS_TO_TICKS(250));
     gpio_set_level(CONFIG_PIN_CO2_EN, 1);
     vTaskDelay(pdMS_TO_TICKS(50));
 
@@ -97,7 +97,7 @@ void co2_read_task(void *param) {
 
     write_saved_calib_to_sensor();
 
-    const uint32_t read_cycle_time_ticks = 10 * 1000;
+    const uint32_t read_cycle_time_ticks = 1000; //10 * 1000;
     const uint32_t calib_persist_time_ticks = 12 * 3600 * 1000;
     _Static_assert(configTICK_RATE_HZ == 1000, "1kHz tick");
 
@@ -111,7 +111,7 @@ void co2_read_task(void *param) {
         ppm = 0;
         vTaskDelay(read_cycle_time_ticks);
 
-        if (num_fails > 10) {
+        if (num_fails > 5) {
             ESP_LOGW(TAG, "Too many CO2 fails, restarting sensor");
             co2_restart(true);
             num_fails = 0;
diff --git a/main/periph_init.c b/main/periph_init.c
index a982d5a..c1046bc 100644
--- a/main/periph_init.c
+++ b/main/periph_init.c
@@ -103,7 +103,10 @@ esp_err_t periph_init() {
         }
 
         gpio_set_level(CONFIG_PIN_CO2_COMSEL, 1); // low=I2C
-        gpio_set_level(CONFIG_PIN_CO2_EN, 1); // active high
+
+        gpio_set_level(CONFIG_PIN_CO2_EN, 0);
+        vTaskDelay(pdMS_TO_TICKS(250));
+        gpio_set_level(CONFIG_PIN_CO2_EN, 1);
     }
 
     // input