diff --git a/lib/busvoodoo_uart_generic.c b/lib/busvoodoo_uart_generic.c
index bfe4b65..33313c4 100644
--- a/lib/busvoodoo_uart_generic.c
+++ b/lib/busvoodoo_uart_generic.c
@@ -138,11 +138,11 @@ bool busvoodoo_uart_generic_setup(char** prefix, const char* line)
 				}
 			}
 			if (BUSVOODOO_UART_SETTING_PARITY == busvoodoo_uart_generic_setting) { // if next setting
-				printf("1) none\n");
-				printf("2) even\n");
-				printf("3) odd\n");
-				printf("4) mark\n");
-				printf("5) space\n");
+				puts("1) none\n");
+				puts("2) even\n");
+				puts("3) odd\n");
+				puts("4) mark\n");
+				puts("5) space\n");
 				snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "parity (1,2,3,4,5) [%u]", busvoodoo_uart_generic_parity+1); // prepare next setting
 				*prefix = busvoodoo_global_string; // display next setting
 			}
@@ -158,10 +158,10 @@ bool busvoodoo_uart_generic_setup(char** prefix, const char* line)
 				}
 			}
 			if (BUSVOODOO_UART_SETTING_STOPBITS == busvoodoo_uart_generic_setting) { // if next setting
-				printf("1) 0.5\n");
-				printf("2) 1\n");
-				printf("3) 1.5\n");
-				printf("4) 2\n");
+				puts("1) 0.5\n");
+				puts("2) 1\n");
+				puts("3) 1.5\n");
+				puts("4) 2\n");
 				snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "stop bits (1,2,3,4) [%c]", USART_STOPBITS_0_5 == busvoodoo_uart_generic_stopbits ? '1' : (USART_STOPBITS_1 == busvoodoo_uart_generic_stopbits ? '2' : (USART_STOPBITS_1_5 == busvoodoo_uart_generic_stopbits ? '3' : '4'))); // prepare next setting
 				*prefix = busvoodoo_global_string; // display next setting
 			}
@@ -194,8 +194,8 @@ bool busvoodoo_uart_generic_setup(char** prefix, const char* line)
 					goto setting_done; // actually go to next setting
 #endif
 				}
-				printf("1) no flow control\n");
-				printf("2) RTS/CTS hardware flow control\n");
+				puts("1) no flow control\n");
+				puts("2) RTS/CTS hardware flow control\n");
 				snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "flow control (1,2) [%c]", busvoodoo_uart_generic_hwflowctl ? '2' : '1'); // prepare next setting
 				*prefix = busvoodoo_global_string; // display next setting
 			}
@@ -221,9 +221,9 @@ setting_drive:
 					busvoodoo_uart_generic_setting = BUSVOODOO_UART_SETTING_DONE; // go to next setting
 					goto setting_done; // actually go to next setting
 				}
-				printf("1) push-pull (3.3V)\n");
-				printf("2) open-drain, with embedded pull-up resistors (2kO)\n");
-				printf("3) open-drain, with external pull-up resistors\n");
+				puts("1) push-pull (3.3V)\n");
+				puts("2) open-drain, with embedded pull-up resistors (2kO)\n");
+				puts("3) open-drain, with external pull-up resistors\n");
 				snprintf(busvoodoo_global_string, LENGTH(busvoodoo_global_string), "drive mode (1,2,3) [%c]", busvoodoo_uart_generic_drive ? '1' : (busvoodoo_uart_generic_pullup ? '2' : '3')); // show drive mode
 				*prefix = busvoodoo_global_string; // display next setting
 			}
@@ -280,7 +280,7 @@ setting_done:
 #if BUSVOODOO_HARDWARE_VERSION != 2
 				if (!busvoodoo_uart_generic_drive && busvoodoo_uart_generic_pullup) { // enable embedded pull-ups if used
 					busvoodoo_embedded_pullup(true); // set embedded pull-ups
-					printf("use LV to set pull-up voltage\n");
+					puts("use LV to set pull-up voltage\n");
 				}
 #endif
 				usart_enable(busvoodoo_uart_generic_specific->usart); // enable USART
@@ -358,7 +358,7 @@ static void busvoodoo_uart_generic_read(void)
 	if (busvoodoo_uart_generic_specific->rx_pre) {
 		(*busvoodoo_uart_generic_specific->rx_pre)();
 	}
-	printf("read: ");
+	puts("read: ");
 	while (!(USART_SR(busvoodoo_uart_generic_specific->usart) & USART_SR_RXNE) && !user_input_available); // wait for incoming data to be available (or user input to exit)
 	if ((USART_SR(busvoodoo_uart_generic_specific->usart) & USART_SR_RXNE)) { // verify if data has been received
 		busvoodoo_led_blue_pulse(BUSVOODOO_LED_PULSE); // enable blue LED to show reception
@@ -369,19 +369,19 @@ static void busvoodoo_uart_generic_read(void)
 		// display data
 		printf("'%c'/0x%02x", input, input);
 		// display errors
-		printf("(");
+		putc('(');
 		if (error_noise) {
-			printf("noise");
+			puts("noise");
 		} else if (error_framing) {
-			printf("framing");
+			puts("framing");
 		} else if (usart_enhanced_parity_error(busvoodoo_uart_generic_specific->usart)) {
-			printf("parity");
+			puts("parity");
 		} else {
-			printf("no");
+			puts("no");
 		}
-		printf(" error)");
+		puts(" error)");
 	}
-	printf("\n");
+	putc('\n');
 	if (user_input_available) { // user interrupted flow
 		user_input_get(); // discard user input
 	}
@@ -499,14 +499,14 @@ static bool busvoodoo_uart_generic_action(const char* action, uint32_t repetitio
 static void busvoodoo_uart_generic_command_actions(void* argument)
 {
 	if (NULL == argument || 0 == strlen(argument)) {
-		printf("available actions (separated by space or ,):\n");
-		printf("0\twrite decimal value\n");
-		printf("0x0\twrite hexadecimal value\n");
-		printf("0b0\twrite binary value\n");
-		printf("\"a\"/'a'\twrite ASCII characters\n");
-		printf("r\tread value\n");
-		printf("u/m\twait 1 us/ms\n");
-		printf(":n\trepeat action n times\n");
+		puts("available actions (separated by space or ,):\n");
+		puts("0\twrite decimal value\n");
+		puts("0x0\twrite hexadecimal value\n");
+		puts("0b0\twrite binary value\n");
+		puts("\"a\"/'a'\twrite ASCII characters\n");
+		puts("r\tread value\n");
+		puts("u/m\twait 1 us/ms\n");
+		puts(":n\trepeat action n times\n");
 		return;
 	}
 
@@ -518,9 +518,9 @@ static void busvoodoo_uart_generic_command_actions(void* argument)
 	strncpy(copy, argument, strlen(argument) + 1);
 	// verify and perform actions
 	if (!busvoodoo_global_actions(copy, false, &busvoodoo_uart_generic_action)) { // verify actions
-		printf("malformed action(s)\n");
+		puts("malformed action(s)\n");
 	} else { // action are ok
-		printf("press any key to exit\n");
+		puts("press any key to exit\n");
 		busvoodoo_global_actions(argument, true, &busvoodoo_uart_generic_action); // perform action
 		if (user_input_available) { // user interrupted flow
 			user_input_get(); // discard user input
@@ -543,11 +543,11 @@ static void busvoodoo_uart_generic_command_transmit(void* argument)
 	if (NULL == argument || 0 == strlen(argument)) { // nothing to transmit
 		argument = "\r\n"; // transmit CR+LF
 	}
-	printf("press any key to exit\n");
+	puts("press any key to exit\n");
 	for (uint16_t i = 0; ((char*)(argument))[i] && !user_input_available; i++) {
 		while ((0 == (USART_SR(busvoodoo_uart_generic_specific->usart) & USART_SR_TXE) && !user_input_available)); // wait for transmit buffer to be empty
 		if (USART_SR(busvoodoo_uart_generic_specific->usart) & USART_SR_TXE) { // we can send a character
-			printf("%c", ((char*)(argument))[i]); // echo character to transmit
+			putc(((char*)(argument))[i]); // echo character to transmit
 			busvoodoo_led_blue_pulse(BUSVOODOO_LED_PULSE); // pulse blue LED to show transmission
 			usart_enhanced_send(busvoodoo_uart_generic_specific->usart, ((char*)(argument))[i]); // transmit character
 		}
@@ -557,7 +557,7 @@ static void busvoodoo_uart_generic_command_transmit(void* argument)
 		user_input_get(); // discard user input
 	}
 	if (strcmp(argument, "\r\n")) {
-		printf("\n");
+		putc('\n');
 	}
 	if (busvoodoo_uart_generic_specific->tx_post) {
 		(*busvoodoo_uart_generic_specific->tx_post)();
@@ -577,7 +577,7 @@ static void busvoodoo_uart_generic_command_receive(void* argument)
 		} else if (0 == strcmp(argument, "b") || 0 == strcmp(argument, "bin")) { // user wants binary display
 			display_bin = true; // remember to display in binary
 		} else {
-			printf("malformed argument\n");
+			puts("malformed argument\n");
 			return;
 		}
 	}
@@ -587,7 +587,7 @@ static void busvoodoo_uart_generic_command_receive(void* argument)
 	if (busvoodoo_uart_generic_specific->rx_pre) {
 		(*busvoodoo_uart_generic_specific->rx_pre)();
 	}
-	printf("press any key to exit\n");
+	puts("press any key to exit\n");
 	while (!user_input_available) { // check for user input to exit
 		if ((USART_SR(busvoodoo_uart_generic_specific->usart) & USART_SR_RXNE)) { // verify if data has been received
 			uint8_t input = usart_enhanced_recv(busvoodoo_uart_generic_specific->usart); // receive character
@@ -602,7 +602,7 @@ static void busvoodoo_uart_generic_command_receive(void* argument)
 		}
 	}
 	user_input_get(); // discard user input
-	printf("\n"); // get to next line
+	putc('\n'); // get to next line
 	if (busvoodoo_uart_generic_specific->rx_post) {
 		(*busvoodoo_uart_generic_specific->rx_post)();
 	}
@@ -620,7 +620,7 @@ static void busvoodoo_uart_generic_command_transceive(void* argument)
 	if (busvoodoo_uart_generic_specific->rx_pre) {
 		(*busvoodoo_uart_generic_specific->rx_pre)();
 	}
-	printf("press 5 times escape to exit\n");
+	puts("press 5 times escape to exit\n");
 	char last_c = 0; // last user character received
 	uint8_t esc_count = 0; // number of times escape has press received
 	while (true) { // check for escape sequence
@@ -659,10 +659,10 @@ static void busvoodoo_uart_generic_command_transceive(void* argument)
 		if ((USART_SR(busvoodoo_uart_generic_specific->usart) & USART_SR_RXNE)) { // verify if data has been received
 			char input = usart_enhanced_recv(busvoodoo_uart_generic_specific->usart); // receive character
 			busvoodoo_led_blue_pulse(BUSVOODOO_LED_PULSE); // enable blue LED to show reception
-			printf("%c", input); // print received character
+			putc(input); // print received character
 		}
 	}
-	printf("\n"); // get to next line
+	putc('\n'); // get to next line
 	if (busvoodoo_uart_generic_specific->rx_post) {
 		(*busvoodoo_uart_generic_specific->rx_post)();
 	}
@@ -674,7 +674,7 @@ static void busvoodoo_uart_generic_command_transceive(void* argument)
 static void busvoodoo_uart_generic_command_error(void* argument)
 {
 	(void)argument; // argument not used
-	printf("press any key to exit\n");
+	puts("press any key to exit\n");
 	while (!user_input_available) { // wait until user interrupt
 		busvoodoo_uart_generic_read(); // read incoming data (this also checks for errors
 	}
@@ -750,11 +750,11 @@ static void busvoodoo_uart_generic_command_detect(void* argument)
 {
 	(void)argument; // argument not used
 	if (!busvoodoo_uart_generic_specific->timer) {
-		printf("baud rate detection not possible (no timer available)\n");
+		puts("baud rate detection not possible (no timer available)\n");
 		return;
 	}
-	printf("the more traffic is incoming, the better the detection\n");
-	printf("press any key to exit\n");
+	puts("the more traffic is incoming, the better the detection\n");
+	puts("press any key to exit\n");
 
 	// setup USART to receive character
 	uint8_t uart_databits = 8; // start with 8 bits since this is the most common case (i.e. no additional parity bit is used)
@@ -973,7 +973,7 @@ static void busvoodoo_uart_generic_command_detect(void* argument)
 			// print received data if a configuration has been found
 			if (uart_configuration_valid < LENGTH(uart_configurations)) { // valid configuration existing
 				if (uart_configurations[uart_configuration_valid].databits >= 7 && usart_data_relevant < 0x80) { // this is probably valid ASCII data
-					printf("%c", usart_data_relevant);
+					putc(usart_data_relevant);
 				} else {
 					printf("0x%02x ", usart_data_relevant);
 				}
@@ -983,7 +983,7 @@ static void busvoodoo_uart_generic_command_detect(void* argument)
 		}
 	}
 	user_input_get(); // clear input used to interrupt previous loop
-	printf("\n");
+	putc('\n');
 
 	// switch off RX
 	if (busvoodoo_uart_generic_specific->rx_post) {