diff --git a/components/services/accessors.c b/components/services/accessors.c
index e2e4607b..cd12279e 100644
--- a/components/services/accessors.c
+++ b/components/services/accessors.c
@@ -58,3 +58,22 @@ const i2c_config_t * config_i2c_get(int * i2c_port) {
 	if(i2c_port) *i2c_port=i2c_system_port;
 	return &i2c;
 }
+
+/****************************************************************************************
+ * 
+ */
+void parse_set_GPIO(void (*cb)(int gpio, char *value)) {
+	char *nvs_item, *p, type[4];
+	int gpio;
+	
+	if ((nvs_item = config_alloc_get(NVS_TYPE_STR, "set_GPIO")) == NULL) return;
+	
+	p = nvs_item;
+	
+	do {
+		if (sscanf(p, "%d=%3[^,]", &gpio, type) > 0) cb(gpio, type);
+		p = strchr(p, ',');
+	} while (p++);
+	
+	free(nvs_item);
+}	
\ No newline at end of file
diff --git a/components/services/accessors.h b/components/services/accessors.h
index 615a8c52..d5daada7 100644
--- a/components/services/accessors.h
+++ b/components/services/accessors.h
@@ -13,3 +13,4 @@
 
 esp_err_t 				config_i2c_set(const i2c_config_t * config, int port);
 const i2c_config_t * 	config_i2c_get(int * i2c_port);
+void 					parse_set_GPIO(void (*cb)(int gpio, char *value));
diff --git a/components/services/driver_SSD1306.c b/components/services/driver_SSD1306.c
index 835e6f0e..963fc66b 100644
--- a/components/services/driver_SSD1306.c
+++ b/components/services/driver_SSD1306.c
@@ -164,7 +164,7 @@ static bool set_font(int num, enum display_font_e font, int space) {
 	lines[0].y = lines[0].space;
 	for (int i = 1; i <= num; i++) lines[i].y = lines[i-1].y + lines[i-1].font->Height + lines[i].space;
 		
-	ESP_LOGI(TAG, "adding line %u at %d (height:%u)", num + 1, lines[num].y, lines[num].font->Height);
+	ESP_LOGI(TAG, "Adding line %u at %d (height:%u)", num + 1, lines[num].y, lines[num].font->Height);
 	
 	if (lines[num].y + lines[num].font->Height > Display.Height) {
 		ESP_LOGW(TAG, "line does not fit display");
diff --git a/components/services/monitor.c b/components/services/monitor.c
index 79906db4..e6c31536 100644
--- a/components/services/monitor.c
+++ b/components/services/monitor.c
@@ -84,18 +84,31 @@ bool spkfault_svc (void) {
 #endif
 }
 
+/****************************************************************************************
+ * 
+ */
+void set_jack_gpio(int gpio, char *value) {
+	 if (!strcasecmp(value, "jack")) {
+		ESP_LOGI(TAG,"Adding jack detection gpio %d", gpio);
+		
+		gpio_pad_select_gpio(JACK_GPIO);
+		gpio_set_direction(JACK_GPIO, GPIO_MODE_INPUT);
+
+		// re-use button management for jack handler, it's a GPIO after all
+		button_create(NULL, JACK_GPIO, BUTTON_LOW, false, 250, jack_handler_default, 0, -1);
+	 }	
+ }
+
 /****************************************************************************************
  * 
  */
 void monitor_svc_init(void) {
 	ESP_LOGI(TAG, "Initializing monitoring");
 	
-#if defined(JACK_GPIO) && JACK_GPIO != -1
-	gpio_pad_select_gpio(JACK_GPIO);
-	gpio_set_direction(JACK_GPIO, GPIO_MODE_INPUT);
-
-	// re-use button management for jack handler, it's a GPIO after all
-	button_create(NULL, JACK_GPIO, BUTTON_LOW, false, 250, jack_handler_default, 0, -1);
+#if !defined(JACK_GPIO) || JACK_GPIO == -1
+	parse_set_GPIO(set_jack_gpio);
+#else 
+	set_jack_gpio(JACK_GPIO, "jack");	
 #endif
 
 #ifdef SPKFAULT_GPIO
diff --git a/components/services/services.c b/components/services/services.c
index cd13d950..f038b870 100644
--- a/components/services/services.c
+++ b/components/services/services.c
@@ -25,6 +25,25 @@ int i2c_system_port = I2C_SYSTEM_PORT;
 
 static const char *TAG = "services";
 
+/****************************************************************************************
+ * 
+ */
+void set_power_gpio(int gpio, char *value) {
+	bool parsed = true;
+	
+	if (!strcasecmp(value, "vcc") ) {
+		gpio_pad_select_gpio(gpio);
+		gpio_set_direction(gpio, GPIO_MODE_OUTPUT);
+		gpio_set_level(gpio, 1);
+	} else if (!strcasecmp(value, "gnd")) {
+		gpio_pad_select_gpio(gpio);
+		gpio_set_direction(gpio, GPIO_MODE_OUTPUT);
+		gpio_set_level(gpio, 0);
+	} else parsed = false	;
+	
+	if (parsed) ESP_LOGI(TAG, "set GPIO %u to %s", gpio, value);
+ }	
+
 /****************************************************************************************
  * 
  */
@@ -40,22 +59,8 @@ void services_init(void) {
 	}
 #endif
 
-	// set fixed gpio if any
-	if ((nvs_item = config_alloc_get(NVS_TYPE_STR, "set_GPIO")) != NULL) {
-		char *p = nvs_item, type[4];
-		int gpio;
-		do {
-			if (sscanf(p, "%d=%3[^,]", &gpio, type) > 0) {
-				gpio_pad_select_gpio(gpio);
-				gpio_set_direction(gpio, GPIO_MODE_OUTPUT);
-				if (!strcasecmp(type, "vcc")) gpio_set_level(gpio, 1);
-				else if (!strcasecmp(type, "gnd")) gpio_set_level(gpio, 0);
-				ESP_LOGI(TAG, "set GPIO %u to %s", gpio, type);
-			} 	
-			p = strchr(p, ',');
-		} while (p++);
-		free(nvs_item);
-	}	
+	// set potential power GPIO
+	parse_set_GPIO(set_power_gpio);
 
 	const i2c_config_t * i2c_config = config_i2c_get(&i2c_system_port);
 
diff --git a/components/squeezelite/output_i2s.c b/components/squeezelite/output_i2s.c
index 884339a1..6d95feb6 100644
--- a/components/squeezelite/output_i2s.c
+++ b/components/squeezelite/output_i2s.c
@@ -52,6 +52,7 @@ sure that using rate_delay would fix that
 #include "led.h"
 #include "monitor.h"
 #include "config.h"
+#include "accessors.h"
 
 #define LOCK   mutex_lock(outputbuf->mutex)
 #define UNLOCK mutex_unlock(outputbuf->mutex)
@@ -151,6 +152,21 @@ static void jack_handler(bool inserted) {
 	if (jack_handler_chain) (jack_handler_chain)(inserted);
 }
 
+/****************************************************************************************
+ * amp GPIO
+ */
+void set_amp_gpio(int gpio, char *value) {
+	if (!strcasecmp(value, "amp")) {
+		amp_gpio = gpio;
+		
+		gpio_pad_select_gpio(amp_gpio);
+		gpio_set_direction(amp_gpio, GPIO_MODE_OUTPUT);
+		gpio_set_level(amp_gpio, 0);
+		
+		LOG_INFO("setting amplifier GPIO %d", amp_gpio);
+	}	
+}	
+
 /****************************************************************************************
  * Initialize the DAC output
  */
@@ -258,16 +274,8 @@ void output_init_i2s(log_level level, char *device, unsigned output_buf_size, ch
 	if (jack_mutes_amp && jack_inserted_svc()) adac->speaker(false);
 	else adac->speaker(true);
 	
-	p = config_alloc_get_default(NVS_TYPE_STR, "amp_GPIO", NULL, 0);
-	if (p && *p) {
-		amp_gpio = atoi(p);
-		gpio_pad_select_gpio(amp_gpio);
-		gpio_set_direction(amp_gpio, GPIO_MODE_OUTPUT);
-		gpio_set_level(amp_gpio, 0);
-		LOG_INFO("setting amplifier GPIO %d", amp_gpio);
-	}	
-	free(p);
-	
+	parse_set_GPIO(set_amp_gpio);
+		
 	esp_pthread_cfg_t cfg = esp_pthread_get_default_config();
 	
     cfg.thread_name= "output_i2s";
diff --git a/main/esp_app_main.c b/main/esp_app_main.c
index e53c3a90..616f1776 100644
--- a/main/esp_app_main.c
+++ b/main/esp_app_main.c
@@ -325,9 +325,6 @@ void register_default_nvs(){
 	ESP_LOGD(TAG,"Registering default value for key %s", "stats");
 	config_set_default(NVS_TYPE_STR, "stats", "n", 0);
 	
-	ESP_LOGD(TAG,"Registering default value for key %s", "amp_GPIO");
-	config_set_default(NVS_TYPE_STR, "amp_GPIO", "", 0);
-
 	ESP_LOGD(TAG,"Done setting default values in nvs.");
 }