some delay after power button is pressed for gsm modem

src/main.c

@@ -1529,7 +1529,7 @@ int main(int argc, char* argv[]){
 			// this sleep is used by @link{pwr_save_after_stop2_rtc_wakeup_it} to
 		  	// go to the intermediate sleep in L4 powersave mode, when xxx seconds
 		  	// long sleep is divided into 'PWR_SAVE_STOP2_CYCLE_LENGHT_SEC' to
-		    // serwice IWDG in between
+		    // service IWDG in between
 			system_clock_configure_auto_wakeup_l4(PWR_SAVE_STOP2_CYCLE_LENGHT_SEC);
 
 			pwr_save_enter_stop2();

src/pwr_save.c

@@ -257,16 +257,6 @@ void pwr_save_enter_stop2(void) {
  */
 void pwr_save_after_stop2_rtc_wakeup_it(void) {
 
-	// if yes set curent state
-	rte_main_woken_up = RTE_MAIN_WOKEN_UP_AFTER_LAST_SLEEP;
-
-//	// check if this is an intermediate wakeup from STOP2
-//	pwr_save_check_stop2_cycles();
-//
-//	system_clock_configure_l4();
-//
-//	pwr_save_exit_after_last_stop2_cycle();
-
 	// reload internal watchdog
 	main_reload_internal_wdg();
 
@@ -277,11 +267,6 @@ void pwr_save_after_stop2_rtc_wakeup_it(void) {
 	if (pwr_save_number_of_sleep_cycles > 0) {
 		backup_reg_set_monitor(15);
 
-//		// go back to sleep
-//		// configure how long micro should sleep
-//		system_clock_configure_auto_wakeup_l4(PWR_SAVE_STOP2_CYCLE_LENGHT_SEC);
-//
-//		pwr_save_enter_stop2();
 		rte_main_woken_up = RTE_MAIN_GO_TO_INTERMEDIATE_SLEEP;
 	}
 	else {

system/include/drivers/max31865.h

@@ -30,5 +30,6 @@ void max31865_pool(void);
 int32_t max31865_get_pt100_result();
 int32_t max31865_get_result(uint32_t RTDnominal);
 max31865_qf_t max31865_get_qf(void);
+void max31865_set_state_after_wkup(void);
 
 #endif /* INCLUDE_DRIVERS_MAX31865_H_ */

system/include/gsm/sim800_state_t.h

@@ -12,6 +12,7 @@ typedef enum gsm_sim800_state_t {
 	SIM800_UNKNOWN,
 	SIM800_POWERED_OFF,
 	SIM800_POWERING_ON,
+	SIM800_WAITING_FOR_POWERUP,
 	SIM800_NOT_YET_COMM,
 	SIM800_HANDSHAKING,
 	SIM800_INITIALIZING,

system/src/drivers/max31865.c

@@ -501,3 +501,10 @@ int32_t max31865_get_result(uint32_t RTDnominal) {
 max31865_qf_t max31865_get_qf(void) {
 	return max31865_quality_factor;
 }
+
+void max31865_set_state_after_wkup(void) {
+	max31865_current_state = MAX_SHUTDOWN;
+
+	max31865_shutdown_ticks = MAX31865_INTERVAL - 1;
+}
+

system/src/gsm/sim800c.c

@@ -363,16 +363,20 @@ void gsm_sim800_initialization_pool(srl_context_t * srl_context, gsm_sim800_stat
 	else if (*state == SIM800_POWERING_ON) {
 		gsm_sim800_press_pwr_button();
 
+		*state = SIM800_WAITING_FOR_POWERUP;
+
+	}
+	else if (*state == SIM800_WAITING_FOR_POWERUP) {
+		// depress power button
+		gsm_sim800_depress_pwr_button();
+
+		// give GSM module some time for its bootup to complete
 		*state = SIM800_NOT_YET_COMM;
 
 	}
 	else if (*state == SIM800_NOT_YET_COMM) {
-
-		// depress power button
-		gsm_sim800_depress_pwr_button();
-
-		// configure rx timeout
-		srl_switch_timeout(srl_context, 1, 0);
+		// configure rx timeout - give some more time
+		srl_switch_timeout(srl_context, 1, 3000u);
 
 		// send handshake
 		srl_send_data(srl_context, (const uint8_t*) AUTOBAUD_STRING, SRL_MODE_ZERO, strlen(AUTOBAUD_STRING), SRL_INTERNAL);