diff --git a/.gitignore b/.gitignore
index 86edaa5..8163d65 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@ Medias/*.c
 Medias/*.json
 
 Debug/
+Release/
 
 # Created by https://www.toptal.com/developers/gitignore/api/eclipse
 # Edit at https://www.toptal.com/developers/gitignore?templates=eclipse
diff --git a/Core/Inc/PSE_unit.h b/Core/Inc/PSE_unit.h
index 9b90cad..f099824 100644
--- a/Core/Inc/PSE_unit.h
+++ b/Core/Inc/PSE_unit.h
@@ -12,6 +12,8 @@
 
 #include "stm32f1xx_hal.h"
 
+#include "lvgl.h"
+
 typedef struct{
   char name[16]; // brand / name
   uint16_t diameter; // diameter (in µm)
@@ -37,6 +39,12 @@ typedef struct{
   TIM_HandleTypeDef* tim;
 } pse_stepper_conf;
 
+typedef struct{
+	lv_obj_t* flow;
+	lv_obj_t* volume;
+	lv_obj_t* enabled;
+} pse_home_display;
+
 typedef struct{
   uint8_t enabled;
   pse_ports port; // physical port on which this unit is connected
@@ -45,9 +53,12 @@ typedef struct{
   uint32_t set_volume; // volume to stop at (0 for no max)
   pse_syringe* syringe; // associated syringe
   pse_stepper_conf* stepper_conf; // hardware configuration for the associated stepper
+  pse_home_display* home_display; // Widgets for updating the home screen
 } pse_unit;
 
-void load_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* stepper_confs, uint8_t unit_num);
-void save_units(pse_unit* units, uint8_t unit_num);
+
+void load_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* stepper_confs, pse_home_display* home_displays, uint8_t unit_num, uint16_t ws_ind);
+void load_units_short(pse_unit* units, uint8_t unit_num, uint16_t ws_ind);
+void save_units(pse_unit* units, uint8_t unit_num, uint16_t ws_ind);
 
 #endif 
diff --git a/Core/Inc/PSE_unit_edit_screen.h b/Core/Inc/PSE_unit_edit_screen.h
index 3687aa2..c0b3081 100644
--- a/Core/Inc/PSE_unit_edit_screen.h
+++ b/Core/Inc/PSE_unit_edit_screen.h
@@ -10,6 +10,6 @@
 
 #include "PSE_unit.h"
 
-void PSE_unit_edit_screen_Gen(pse_unit* units, pse_unit* unit, uint8_t units_num);
+void PSE_unit_edit_screen_Gen(pse_unit* units, pse_unit* unit, uint8_t units_num, uint16_t ws_ind);
 
 #endif /* INC_PSE_EDIT_SCREEN_H_ */
diff --git a/Core/Src/PSE_unit.c b/Core/Src/PSE_unit.c
index 8fd4c54..dd5b124 100644
--- a/Core/Src/PSE_unit.c
+++ b/Core/Src/PSE_unit.c
@@ -5,12 +5,17 @@
  *      Author: leo
  */
 
+#define _GNU_SOURCE
+
 #include "PSE_unit.h"
 
 #include "fatfs.h"
 #include "lvgl.h"
 
-static void generate_default_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* stepper_confs, uint8_t unit_num){
+#include <stdio.h>
+#include <stdlib.h>
+
+static void generate_default_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* stepper_confs, pse_home_display* home_displays, uint8_t unit_num){
 	for(int i = 0; i < unit_num; i++){
 		units[i] = (pse_unit){
 	      .enabled = i%2,
@@ -20,6 +25,7 @@ static void generate_default_units(pse_unit* units, pse_syringe* syringes, pse_s
 	      .set_volume = 0,
 	      .syringe = &syringes[i],
 		  .stepper_conf = &stepper_confs[i],
+		  .home_display = &home_displays[i],
 	    };
 	    syringes[i] = (pse_syringe){
 	    	.name = "Test",
@@ -32,16 +38,27 @@ static void generate_default_units(pse_unit* units, pse_syringe* syringes, pse_s
 // Load units from file
 // Units configuration are saved as binary, in the order [pse_unit, pse_syringe, pse_stepper_conf] with each unit back to back
 // In case of any error fallback to a default configuration
-void load_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* stepper_confs, uint8_t unit_num){
+void load_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* stepper_confs, pse_home_display* home_displays, uint8_t unit_num, uint16_t ws_ind){
 	// Open save file
 	FIL saveFile;
-	if(f_open(&saveFile, "PSE_save.txt", FA_READ) != FR_OK){
-		lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Error", "Could not load configuration to SD card", NULL, true);
+
+	char* filename;
+	if(asprintf(&filename, "PSEsave%d", ws_ind) == -1){
+		lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Error", "Could not load configuration from SD card (filename gen error)", NULL, true);
 		lv_obj_center(mbox1);
-		generate_default_units(units, syringes, stepper_confs, unit_num);
+		free(filename);
 		return;
 	}
 
+	if(f_open(&saveFile, filename, FA_READ) != FR_OK){
+		lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Error", "Could not load configuration from SD card", NULL, true);
+		lv_obj_center(mbox1);
+		generate_default_units(units, syringes, stepper_confs, home_displays, unit_num);
+		free(filename);
+		return;
+	}
+	free(filename);
+
 	// read configuration sequentially
 	for(int i = 0; i < unit_num; i++){
 		FRESULT res;
@@ -49,12 +66,13 @@ void load_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* steppe
 		res = f_read(&saveFile, &units[i], sizeof(units[i]), &bytesRead);
 		units[i].syringe = &syringes[i];
 		units[i].stepper_conf = &stepper_confs[i];
+		units[i].home_display = &home_displays[i];
 
 		res += f_read(&saveFile, units[i].syringe, sizeof(pse_syringe), &bytesRead);
 		res += f_read(&saveFile, units[i].stepper_conf, sizeof(pse_stepper_conf), &bytesRead);
 
 		if(res != FR_OK){
-			generate_default_units(units, syringes, stepper_confs, unit_num);
+			generate_default_units(units, syringes, stepper_confs, home_displays, unit_num);
 			return;
 		}
 	}
@@ -62,12 +80,29 @@ void load_units(pse_unit* units, pse_syringe* syringes, pse_stepper_conf* steppe
 	f_close(&saveFile);
 }
 
-void save_units(pse_unit* units, uint8_t unit_num){
+void load_units_short(pse_unit* units, uint8_t unit_num, uint16_t ws_ind){
+	load_units(units, units->syringe, units->stepper_conf, units->home_display, unit_num, ws_ind);
+}
+
+void save_units(pse_unit* units, uint8_t unit_num, uint16_t ws_ind){
 	// Open save file
 	FIL saveFile;
-	if(f_open(&saveFile, "PSE_save.txt", FA_WRITE | FA_OPEN_ALWAYS) != FR_OK){
-		lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Error", "Could not save configuration to SD card", NULL, true);
+
+	char* filename;
+	if(asprintf(&filename, "PSEsave%d", ws_ind) == -1){
+		lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Error", "Could not save configuration to SD card (filename gen error)", NULL, true);
 		lv_obj_center(mbox1);
+		free(filename);
+		return;
+	}
+
+	FRESULT res;
+	if((res = f_open(&saveFile, filename, FA_WRITE | FA_OPEN_ALWAYS)) != FR_OK){
+		lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Error", "aaa", NULL, true);
+		lv_obj_t* text = lv_msgbox_get_text(mbox1);
+		lv_label_set_text_fmt(text, "Could not save configuration to SD card (file open failed %d <%s>)", res, filename);
+		lv_obj_center(mbox1);
+		free(filename);
 		return;
 	}
 
@@ -84,4 +119,5 @@ void save_units(pse_unit* units, uint8_t unit_num){
 	}
 
 	f_close(&saveFile);
+	free(filename);
 }
diff --git a/Core/Src/PSE_unit_edit_screen.c b/Core/Src/PSE_unit_edit_screen.c
index e4c594d..79516fe 100644
--- a/Core/Src/PSE_unit_edit_screen.c
+++ b/Core/Src/PSE_unit_edit_screen.c
@@ -22,12 +22,13 @@ static lv_obj_t* this_screen;
 static pse_unit* c_pse_units;
 static pse_unit* c_pse_unit;
 static uint8_t c_pse_units_num;
+static uint16_t ws_index;
 
 static void back_button_handler(lv_event_t * e){
   lv_event_code_t code = lv_event_get_code(e);
 
 	if(code == LV_EVENT_CLICKED) {
-		save_units(c_pse_units, c_pse_units_num);
+		save_units(c_pse_units, c_pse_units_num, ws_index);
 
 		// update stepper pwm generation
 		pse_stepper_planer_compute_sps(c_pse_unit);
@@ -159,7 +160,7 @@ static void jog_forward_button_handler(lv_event_t* e){
 
 	if(code == LV_EVENT_PRESSED) {
 		pse_sp_jog_speed(unit->stepper_conf, 1);
-		pse_sp_set_dir(unit->stepper_conf, 0);
+		pse_sp_set_dir(unit->stepper_conf, 1);
 		pse_sp_start_axis(unit->stepper_conf);
 	}
 	else if(code == LV_EVENT_RELEASED){
@@ -174,7 +175,7 @@ static void jog_backward_button_handler(lv_event_t* e){
 
 	if(code == LV_EVENT_PRESSED) {
 		pse_sp_jog_speed(unit->stepper_conf, 1);
-		pse_sp_set_dir(unit->stepper_conf, 1);
+		pse_sp_set_dir(unit->stepper_conf, 0);
 		pse_sp_start_axis(unit->stepper_conf);
 	}
 	else if(code == LV_EVENT_RELEASED){
@@ -226,11 +227,13 @@ static lv_obj_t* controls_widget(lv_obj_t* parent, pse_unit* unit){
 	return cont;
 }
 
-void PSE_unit_edit_screen_Gen(pse_unit* units, pse_unit* c_unit, uint8_t units_num){
+void PSE_unit_edit_screen_Gen(pse_unit* units, pse_unit* c_unit, uint8_t units_num, uint16_t ws_ind){
 	// Create a new screen
 	lv_obj_t* scr = lv_obj_create(NULL);
 	this_screen = scr;
 
+	ws_index = ws_ind;
+
 	c_pse_units = units;
 	c_pse_unit = c_unit;
 	c_pse_units_num = units_num;
diff --git a/Core/Src/home_screen.c b/Core/Src/home_screen.c
index 5a287aa..d3cb64a 100644
--- a/Core/Src/home_screen.c
+++ b/Core/Src/home_screen.c
@@ -17,6 +17,9 @@
 static pse_unit* units;
 static int units_num;
 
+static uint16_t workspace_index = 0;
+static lv_obj_t* ws_label;
+
 static void run_handler(lv_event_t * e){
 	lv_event_code_t code = lv_event_get_code(e);
 
@@ -44,7 +47,7 @@ static lv_obj_t* screen;
 static void unit_widget_enabled_handler(lv_event_t * e){
 	lv_event_code_t code = lv_event_get_code(e);
 
-  if(code == LV_EVENT_VALUE_CHANGED) {
+	if(code == LV_EVENT_VALUE_CHANGED) {
 		lv_obj_t* button = lv_event_get_current_target(e);
 		lv_obj_t* label = lv_obj_get_child(button, 0);
 		lv_state_t state = lv_obj_get_state(button);
@@ -52,15 +55,15 @@ static void unit_widget_enabled_handler(lv_event_t * e){
 
 		pse_unit* unit = lv_event_get_user_data(e);
 		if(state & LV_STATE_CHECKED){
-			lv_label_set_text(label, LV_SYMBOL_OK);
+			lv_label_set_text(label, LV_SYMBOL_CLOSE);
 			unit->enabled = 0;
 		}
 		else{
-			lv_label_set_text(label, LV_SYMBOL_CLOSE);
+			lv_label_set_text(label, LV_SYMBOL_OK);
 			unit->enabled = 1;
 		}
-		save_units(units, units_num);
-  }
+		save_units(units, units_num, workspace_index);
+	}
 }
 
 static void unit_home_handler(lv_event_t * e){
@@ -82,10 +85,53 @@ static void unit_widget_clicked_handler(lv_event_t* e){
 
 	if(code == LV_EVENT_CLICKED) {
 		pse_unit* unit = lv_event_get_user_data(e);
-		PSE_unit_edit_screen_Gen(units, unit, units_num);
+		PSE_unit_edit_screen_Gen(units, unit, units_num, workspace_index);
 	}
 }
 
+static void update_readouts_widgets(){
+	for(int i = 0; i < units_num; i++){
+		pse_unit* pse_unit = &units[i];
+		lv_label_set_text_fmt(pse_unit->home_display->flow, "%02lu.%03lu\nmL/mn", pse_unit->flow / 1000, pse_unit->flow % 1000);
+		lv_label_set_text_fmt(pse_unit->home_display->volume, "%lu.%lu\nmL", pse_unit->volume / 1000, pse_unit->volume % 1000);
+
+		lv_obj_t* enabled = pse_unit->home_display->enabled;
+		lv_obj_t* enabled_label = lv_obj_get_child(enabled, 0);
+		if(pse_unit->enabled){
+			lv_obj_clear_state(enabled, LV_STATE_CHECKED);
+			lv_label_set_text(enabled_label, LV_SYMBOL_OK);
+		}
+		else{
+			lv_obj_add_state(enabled, LV_STATE_CHECKED);
+			lv_label_set_text(enabled_label, LV_SYMBOL_CLOSE);
+		}
+	}
+}
+
+static void ws_left_handler(lv_event_t * e){
+	lv_event_code_t code = lv_event_get_code(e);
+
+	if(code != LV_EVENT_CLICKED) return;
+
+	if(workspace_index == 0) return;
+	workspace_index--;
+
+	lv_label_set_text_fmt(ws_label, "%d", workspace_index);
+	load_units_short(units, units_num, workspace_index);
+	update_readouts_widgets();
+}
+static void ws_right_handler(lv_event_t * e){
+	lv_event_code_t code = lv_event_get_code(e);
+
+	if(code != LV_EVENT_CLICKED) return;
+
+	workspace_index++;
+
+	lv_label_set_text_fmt(ws_label, "%d", workspace_index);
+	load_units_short(units, units_num, workspace_index);
+	update_readouts_widgets();
+}
+
 static lv_obj_t* PSE_unit_widget(lv_obj_t* parent, pse_unit* pse_unit){
 	// The main container
 	lv_obj_t* cont = lv_obj_create(parent);
@@ -98,12 +144,14 @@ static lv_obj_t* PSE_unit_widget(lv_obj_t* parent, pse_unit* pse_unit){
 	lv_obj_set_width(flow, lv_pct(100));
 	lv_obj_set_flex_grow(flow, 1);
 	lv_label_set_text_fmt(flow, "%02lu.%03lu\nmL/mn", pse_unit->flow / 1000, pse_unit->flow % 1000);
+	pse_unit->home_display->flow = flow;
 
 	// volume delivered readout
 	lv_obj_t* vol = lv_label_create(cont);
 	lv_obj_set_width(vol, lv_pct(100));
 	lv_obj_set_flex_grow(vol, 1);
 	lv_label_set_text_fmt(vol, "%lu.%lu\nmL", pse_unit->volume / 1000, pse_unit->volume % 1000);
+	pse_unit->home_display->volume = vol;
 
 	// home button
 	lv_obj_t* home = lv_btn_create(cont);
@@ -122,11 +170,12 @@ static lv_obj_t* PSE_unit_widget(lv_obj_t* parent, pse_unit* pse_unit){
 	lv_obj_add_event_cb(enabled, unit_widget_enabled_handler, LV_EVENT_ALL, pse_unit);
 	lv_obj_set_flex_grow(enabled, 1);
 	lv_obj_center(enabled_label);
-	lv_label_set_text(enabled_label, LV_SYMBOL_CLOSE);
+	lv_label_set_text(enabled_label, LV_SYMBOL_OK);
 	if(!pse_unit->enabled){
 		lv_obj_add_state(enabled, LV_STATE_CHECKED);
-		lv_event_send(enabled, LV_EVENT_VALUE_CHANGED, NULL);
+		lv_label_set_text(enabled_label, LV_SYMBOL_CLOSE);
 	}
+	pse_unit->home_display->enabled = enabled;
 	return cont;
 }
 
@@ -144,10 +193,11 @@ void Home_Screen_Gen(pse_unit* pse_units, uint8_t pse_unit_num){
 	lv_obj_set_align(top_menu, LV_ALIGN_TOP_LEFT);
 	lv_obj_set_size(top_menu, lv_pct(100), lv_pct(20));
 	lv_obj_set_style_pad_all(top_menu, 5, 0);
+	lv_obj_set_flex_flow(top_menu, LV_FLEX_FLOW_ROW);
 
 	// add a run button
 	lv_obj_t* run_button = lv_btn_create(top_menu);
-	lv_obj_set_size(run_button, lv_pct(10), lv_pct(100));
+	lv_obj_set_flex_grow(run_button, 3);
 	lv_obj_set_align(run_button, LV_ALIGN_TOP_LEFT);
 	lv_obj_add_flag(run_button, LV_OBJ_FLAG_CHECKABLE);
 	lv_obj_add_event_cb(run_button, run_handler, LV_EVENT_ALL, NULL);
@@ -157,6 +207,34 @@ void Home_Screen_Gen(pse_unit* pse_units, uint8_t pse_unit_num){
 	lv_label_set_text(run_label, LV_SYMBOL_PLAY);
 	lv_obj_center(run_label);
 
+	// add workspace switcher
+	lv_obj_t* ws_left = lv_btn_create(top_menu);
+	lv_obj_set_flex_grow(ws_left, 1);
+	lv_obj_add_event_cb(ws_left, ws_left_handler, LV_EVENT_CLICKED, NULL);
+
+	lv_obj_t* ws_left_label = lv_label_create(ws_left);
+	lv_label_set_text(ws_left_label, LV_SYMBOL_LEFT);
+	lv_obj_center(ws_left_label);
+
+	lv_obj_t* ws_label_cont = lv_obj_create(top_menu);
+	lv_obj_set_flex_grow(ws_label_cont, 1);
+	lv_obj_set_height(ws_label_cont, lv_pct(100));
+	lv_obj_set_style_pad_all(ws_label_cont, 0, 0);
+	lv_obj_center(ws_label_cont);
+
+	ws_label = lv_label_create(ws_label_cont);
+	lv_label_set_text_fmt(ws_label, "%d", workspace_index);
+	lv_obj_set_style_text_align(ws_label, LV_TEXT_ALIGN_CENTER, 0);
+	lv_obj_center(ws_label);
+
+	lv_obj_t* ws_right = lv_btn_create(top_menu);
+	lv_obj_set_flex_grow(ws_right, 1);
+	lv_obj_add_event_cb(ws_right, ws_right_handler, LV_EVENT_CLICKED, NULL);
+
+	lv_obj_t* ws_right_label = lv_label_create(ws_right);
+	lv_label_set_text(ws_right_label, LV_SYMBOL_RIGHT);
+	lv_obj_center(ws_right_label);
+
 	// grid layout for the 4 differents units
 	lv_obj_t* units_grid = lv_obj_create(scr);
 	lv_obj_align_to(units_grid, top_menu, LV_ALIGN_OUT_BOTTOM_LEFT, 0, 0);
@@ -172,5 +250,5 @@ void Home_Screen_Gen(pse_unit* pse_units, uint8_t pse_unit_num){
 	}
 	
 	// fade in the new screen
-	lv_scr_load_anim(scr, LV_SCR_LOAD_ANIM_FADE_ON, 0, 3000, false);
+	lv_scr_load_anim(scr, LV_SCR_LOAD_ANIM_FADE_ON, 0, 0, false);
 }
diff --git a/Core/Src/main.c b/Core/Src/main.c
index 30edde9..982df64 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -91,6 +91,7 @@ ADS7843_Def Touch_Def = {
 
 pse_unit pse_units[PSE_UNITS_NUM];
 pse_syringe pse_syringes[PSE_UNITS_NUM];
+pse_home_display pse_home_displays[PSE_UNITS_NUM];
 
 enum steppers_axis{PSE_X_STEPPER, PSE_Y_STEPPER, PSE_Z_STEPPER, PSE_E_STEPPER, PSE_STEPPER_NUM};
 pse_stepper_conf pse_stepper_confs[PSE_STEPPER_NUM] = {
@@ -289,7 +290,7 @@ int main(void)
   f_mount(&FatFs, SD_disk_path, 0);
 
   // Load saved units
-  load_units(pse_units, pse_syringes, pse_stepper_confs, PSE_UNITS_NUM);
+  load_units(pse_units, pse_syringes, pse_stepper_confs, pse_home_displays, PSE_UNITS_NUM, 0);
 
   // Load the home screen
   Home_Screen_Gen(pse_units, PSE_UNITS_NUM);
diff --git a/Core/Src/pse_stepper_planer.c b/Core/Src/pse_stepper_planer.c
index 0c283b9..2b87a5f 100644
--- a/Core/Src/pse_stepper_planer.c
+++ b/Core/Src/pse_stepper_planer.c
@@ -87,10 +87,6 @@ void pse_stepper_planer_compute_sps(pse_unit* unit){
 		__HAL_TIM_SET_AUTORELOAD(c->tim, c->tim_period);
 		__HAL_TIM_SET_PRESCALER(c->tim, c->tim_presc);
 	}
-	lv_obj_t * mbox1 = lv_msgbox_create(NULL, "Info", "aaa", NULL, true);
-	lv_obj_t * mboxtxt = lv_msgbox_get_text(mbox1);
-	lv_label_set_text_fmt(mboxtxt, "res : %llu\npresc : %d\nperiod : %d", res, c->tim_presc, c->tim_period);
-	lv_obj_center(mbox1);
 }
 
 void pse_sp_set_dir_all(pse_unit* units, int units_num, int dir){