Serial Ports - Revision history

OlliW: /* Availability */

2025-11-21T18:34:42Z

Availability

← Older revision		Revision as of 20:34, 21 November 2025
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	\| {{PARAMVALUE\|usb}} \|\| USB connector \|\| USB connector or UART1 port<br>is equal to UART1 \|\| USB connector		\| {{PARAMVALUE\|usb}} \|\| USB connector \|\| USB connector or UART1 port<br>is equal to UART1 \|\| USB connector
	\|-		\|-
	\| {{PARAMVALUE\|uartx}} \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>is equal to ~~UART1, labeled~~ UART1 \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX		\| {{PARAMVALUE\|uartx}} \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UART1, is equal to UART1 \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX
	\|}		\|}
	<!--		<!--

OlliW: /* Availability */

2025-11-21T18:33:43Z

Availability

← Older revision		Revision as of 20:33, 21 November 2025
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	\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port		\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port
	\|-		\|-
	\| {{PARAMVALUE\|uart2}} \|\| has no effect, {{BOX\|UART2}} port not available \|\| {{BOX\|UART2}} port or on {{BOX\|ESP}} port \|\| {{BOX\|UART2~~}} port or on {{BOX\|ESP~~}} port		\| {{PARAMVALUE\|uart2}} \|\| has no effect, {{BOX\|UART2}} port not available \|\| {{BOX\|UART2}} port or on {{BOX\|ESP}} port \|\| {{BOX\|UART2}} port
	\|-		\|-
	\| {{PARAMVALUE\|usb}} \|\| USB connector \|\| USB connector or UART1 port<br>is equal to UART1 \|\| USB connector		\| {{PARAMVALUE\|usb}} \|\| USB connector \|\| USB connector or UART1 port<br>is equal to UART1 \|\| USB connector

OlliW: /* Availability */

2025-11-21T18:33:11Z

Availability

← Older revision		Revision as of 20:33, 21 November 2025
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	Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:		Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:

	* All STorM32 boards provide ~~the~~ {{BOX\|UART}} port.		* All STorM32 boards provide a {{BOX\|UART}} port.

	* All "full-size" STorM32 boards provide ~~the~~ {{BOX\|USB}} port (exception are some special designs such as micro boards). On the v1.3x and v6.x1 boards the USB connector is tied to the ~~MCUs~~ USB peripheral, whereas for the v3.3 and v4.1 boards it is connected via a on-board USB-TTL adapter to the UART1 peripheral.		* All "full-size" STorM32 boards provide a {{BOX\|USB}} port (exception are some special designs such as micro boards). On the v1.3x and v6.x1 boards the USB connector is tied to the MCU's USB peripheral, whereas for the v3.3 and v4.1 boards it is connected via a on-board USB-TTL adapter to the UART1 peripheral.

	* The v3.3/v4.1/v6.x STorM32 boards provide ~~the~~ {{BOX\|UART2}} serial on the {{BOX\|UART2}} port or {{BOX\|ESP}} port. The v1.x boards do not offer this serial (here the GUI setting {{PARAMVALUE\|uart2}} has no effect).		* The v3.3/v4.1/v6.x STorM32 boards provide a {{BOX\|UART2}} serial on the {{BOX\|UART2}} port or {{BOX\|ESP}} port. The v1.x boards do not offer this serial (here the GUI setting {{PARAMVALUE\|uart2}} has no effect).

	* All STorM32 boards ~~offer~~ the {{BOX\|UARTX}} serial~~, which~~ is found on the {{BOX\|RC}} port, pins RC-0 and RC-1, and is accessible in the GUI as {{PARAMVALUE\|uartx}}. In pictures of the v1.x board it is however labelled as UART1 and not UARTX.		* All STorM32 boards provide the {{BOX\|UARTX}} serial. It is found on the {{BOX\|RC}} port, pins RC-0 and RC-1, and is accessible in the GUI as {{PARAMVALUE\|uartx}}. In pictures of the v1.x board it is however labelled as UART1 and not UARTX.

	* ~~The~~ v3.3 STorM32 ~~boards provide a port labeled UART1 (Rx1/Tx1)~~, ~~which is indeed~~ the UART1 hardware peripheral~~. Some v3.3 also provide a physical USB connector, which~~ is ~~however just again the~~ UART1 ~~peripheral~~ (~~tied together via a on-board USB-TTL adapter~~). ~~The UART1 port or USB connector is accessible in~~ the ~~GUI as {{PARAMVALUE\|usb}}, i~~.~~e.,~~ this is the {{BOX\|~~USB~~}} port.		* On the v3.3 STorM32 board, the UART1 hardware peripheral is available as extra UART1 (Rx1/Tx1) port. On the v1.3x boards this peripheral is on the {{BOX\|RC}} port, pins RC-0 and RC-1.

	{\| class="wikitable"		{\| class="wikitable"

OlliW: /* Availability */

2025-11-21T18:28:55Z

Availability

← Older revision		Revision as of 20:28, 21 November 2025
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	* All STorM32 boards provide the {{BOX\|UART}} port.		* All STorM32 boards provide the {{BOX\|UART}} port.

	* ~~The v3.3/v4.1~~ STorM32 boards do provide a port ~~labeled UART1~~ (~~Rx1/Tx1~~)~~, which~~ is ~~indeed~~ the ~~UART1 hardware~~ peripheral~~. Some~~ v3.3 and ~~the~~ v4.1 boards ~~do also provide a physical USB connector, which~~ is ~~however just again the UART1 peripheral (tied together~~ via a on-board USB-TTL adapter~~). The~~ UART1 ~~port or USB connector is accessible in the GUI as {{PARAMVALUE\|usb}}, i.e., this is the {{BOX\|USB}} port~~.		* All "full-size" STorM32 boards provide the {{BOX\|USB}} port (exception are some special designs such as micro boards). On the v1.3x and v6.x1 boards the USB connector is tied to the MCUs USB peripheral, whereas for the v3.3 and v4.1 boards it is connected via a on-board USB-TTL adapter to the UART1 peripheral.

	* ~~On the STorM32 v1~~.x boards the {{BOX\|~~USB~~}} serial ~~is indeed~~ the ~~USB connector~~. The ~~UART1 hardware peripheral, used e~~.~~g. for flashing firmware, is available on these~~ boards on the {{~~BOX~~\|RC}} ~~port, as pins RC-0 and RC-1~~.		* The v3.3/v4.1/v6.x STorM32 boards provide the {{BOX\|UART2}} serial on the {{BOX\|UART2}} port or {{BOX\|ESP}} port. The v1.x boards do not offer this serial (here the GUI setting {{PARAMVALUE\|uart2}} has no effect).

	* ~~On the v3.3/v4.1~~ STorM32 boards the {{BOX\|~~UART2~~}} serial is ~~either available as an explicit~~ {{BOX\|~~UART2~~}} port ~~or via~~ the {{~~BOX~~\|~~ESP~~}} ~~port~~. ~~The~~ v1.x ~~boards do~~ not ~~offer this serial at all (for these boards the GUI setting {{PARAMVALUE\|uart2}} has no effect)~~.		* All STorM32 boards offer the {{BOX\|UARTX}} serial, which is found on the {{BOX\|RC}} port, pins RC-0 and RC-1, and is accessible in the GUI as {{PARAMVALUE\|uartx}}. In pictures of the v1.x board it is however labelled as UART1 and not UARTX.

	* ~~On all~~ STorM32 boards the ~~{{BOX\|UARTX}} serial~~ is ~~available~~ on ~~the {{BOX\|RC}} port, pins RC~~-~~0 and RC~~-~~1 (~~accessible in the GUI as {{PARAMVALUE\|~~uartx~~}}). ~~In pictures of~~ the ~~v1.x board one however finds it indicated as UART1 and not UARTX (on these boards~~ {{BOX\|~~UARTX~~}} ~~is in fact the UART1 peripheral)~~.		* The v3.3 STorM32 boards provide a port labeled UART1 (Rx1/Tx1), which is indeed the UART1 hardware peripheral. Some v3.3 also provide a physical USB connector, which is however just again the UART1 peripheral (tied together via a on-board USB-TTL adapter). The UART1 port or USB connector is accessible in the GUI as {{PARAMVALUE\|usb}}, i.e., this is the {{BOX\|USB}} port.

	{\| class="wikitable"		{\| class="wikitable"

OlliW: /* MCU Peripherals and Special Role of UART1 */

2025-11-21T18:16:47Z

MCU Peripherals and Special Role of UART1

← Older revision		Revision as of 20:16, 21 November 2025
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	UART1 is different. It is not a port like {{BOX\|UART}} or {{BOX\|UART2}}, and you won't find any parameter with the option {{PARAMVALUE\|uart1}} in the GUI, yet the name "UART1" appears in various places, e.g. as Rx1/Tx1 labels on boards, or in pin descriptions, or in documentary.		UART1 is different. It is not a port like {{BOX\|UART}} or {{BOX\|UART2}}, and you won't find any parameter with the option {{PARAMVALUE\|uart1}} in the GUI, yet the name "UART1" appears in various places, e.g. as Rx1/Tx1 labels on boards, or in pin descriptions, or in documentary.

	=== MCU Peripherals and Special Role of UART1 ===		=== MCU Peripherals and Special Role of UART1 on v1.x, v3.3 Boards ===

	The microcontroller (MCU) which is used in the STorM32 controllers (STM32F103 ~~chip~~) offers a number of hardware peripherals, among them the serial peripherals. These are generally called UARTx or USARTx, where x goes from 1 to 5 for e.g. the STM32F103RC chip (we will not distinguish between UARTx or USARTx but just call them UARTx). Note: This naming convention is a choice of the chip manufacturer, not ours.		The microcontroller (MCU) which is used in the STorM32 controllers (STM32F103 or STM323H7A3) offers a number of hardware peripherals, among them the serial peripherals. These are generally called UARTx or USARTx, where x goes from 1 to 5 for e.g. the STM32F103RC chip (we will not distinguish between UARTx or USARTx but just call them UARTx). Note: This naming convention is a choice of the chip manufacturer, not ours.

	The names for the serial hardware peripherals must not be confused with the names of the serial ports of the STorM32 controller!		The names for the serial hardware peripherals must not be confused with the names of the serial ports of the STorM32 controller!

	For instance, on the v1.3x boards the serial port {{BOX\|UART}} is ~~connected to~~ the hardware peripheral UART3, while on the v3.3 and v4.1 boards it is ~~connected to~~ the hardware peripheral UART5. From a user perspective this is however irrelevant, since all the user needs to know is that there is a serial port {{BOX\|UART}} which can be selected in the GUI as {{PARAMVALUE\|uart}}.		For instance, on the v1.3x boards the serial port {{BOX\|UART}} is the hardware peripheral UART3, while on the v3.3 and v4.1 boards it is the hardware peripheral UART5. From a user perspective this is however irrelevant, since all the user needs to know is that there is a serial port {{BOX\|UART}} which can be selected in the GUI as {{PARAMVALUE\|uart}}.

	The hardware peripheral UART1 is special, since it allows us to flash firmware into the microcontroller, and it is used by STorM32 for exactly this purpose. Therefore, ~~we want to expose it~~ on ~~the~~ STorM32 boards so we can flash the firmware using it, which is the reason for why one finds a UART1 port (or Rx1/Tx1 labels) on ~~some~~ boards.		The hardware peripheral UART1 is special, since it allows us to flash the firmware into the microcontroller of the v1.x and v3.3 boards, and it is used by STorM32 for exactly this purpose. Therefore, this peripheral is exposed on these STorM32 boards so we can flash the firmware using it, which is the reason for why one finds a UART1 port (or Rx1/Tx1 labels) on the v1.x and v3.3 boards.

	Unfortunately, the number of serial ports provided by a STorM32 ~~board or by the MCU~~ is not sufficient for some applications. On v1.3x boards~~, e.g.,~~ one ~~would want to~~ also ~~use~~ the peripheral UART1 to fullfill the user's needs. In the STorM32 software, this is made possible, for some features, as {{BOX\|UARTX}} port.		Unfortunately, the number of serial ports provided by v1.3x STorM32 boards is not sufficient for some applications. Therefore, on v1.3x boards one can use also the peripheral UART1 to fullfill the user's needs. In the STorM32 software, this is made possible, for some features, as {{BOX\|UARTX}} port.

	=== Availability ===		=== Availability ===

OlliW: /* Availability */

2025-11-16T14:38:34Z

Availability

← Older revision		Revision as of 16:38, 16 November 2025
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	! v1.3x		! v1.3x
	! v3.3/v4.1		! v3.3/v4.1
			! v6.2/v6.3
	\|-		\|-
	\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port		\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port
	\|-		\|-
	\| {{PARAMVALUE\|uart2}} \|\| has no effect, {{BOX\|UART2}} port not available \|\| {{BOX\|UART2}} port or on {{BOX\|ESP}} port		\| {{PARAMVALUE\|uart2}} \|\| has no effect, {{BOX\|UART2}} port not available \|\| {{BOX\|UART2}} port or on {{BOX\|ESP}} port \|\| {{BOX\|UART2}} port or on {{BOX\|ESP}} port
	\|-		\|-
	\| {{PARAMVALUE\|usb}} \|\| USB connector \|\| USB connector or UART1 port<br>is equal to UART1		\| {{PARAMVALUE\|usb}} \|\| USB connector \|\| USB connector or UART1 port<br>is equal to UART1 \|\| USB connector
	\|-		\|-
	\| {{PARAMVALUE\|uartx}} \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>is equal to UART1, labeled UART1 \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX		\| {{PARAMVALUE\|uartx}} \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>is equal to UART1, labeled UART1 \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX
	\|}		\|}
	<!--		<!--

OlliW at 08:36, 4 August 2025

2025-08-04T08:36:38Z

← Older revision		Revision as of 10:36, 4 August 2025
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	This article ~~provides~~ clarification ~~regarding~~ the STorM32's serial ports.		This article aims at providing some clarification concerning the STorM32's serial ports.

	<div class="toclimit-2">__TOC__</div>		<div class="toclimit-2">__TOC__</div>
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	== Ports ==		== Ports ==

	~~Generally, the STorM32 port~~ naming ~~follows this scheme: The name~~ of ~~a port is simply~~ the ~~type of the port, plus a number for a 2nd port of that type, and so on. Example: {{BOX\|RC}} and {{BOX\|RC2}}. The~~ STorM32 serial ports ~~are named {{BOX\|USB}}~~, ~~{{BOX\|UART}}, {{BOX\|UART2}}, and {{BOX\|UART3}}, and are accessible~~ in ~~the GUI as {{PARAMVALUE\|usb}}~~, ~~{{PARAMVALUE\|uart}}, {{PARAMVALUE\|uart2}}, and {{PARAMVALUE\|uart3}}. The pins corresponding to these serial ports are labelled as Rx/Tx~~.		The naming of the STorM32 serial ports may appear confusing at first. However, it is in fact pretty consistent, across all boards - with one (unfortunate) exception: UART1.

	~~There~~ is ~~one exception~~, ~~found~~ on ~~the the v3~~.~~3 board~~: ~~UART1~~. ~~It is not a port like~~ {{BOX\|UART}} or {{BOX\|UART2}}, and ~~you won't find any parameter option~~ {{~~PARAMVALUE~~\|~~uart1~~}} in the GUI.		Generally, the STorM32 port naming follows this scheme: The name of a port is simply the type of the port, plus a number (or symbol) for the 2nd port of that type, and so on. Example: {{BOX\|RC}} and {{BOX\|RC2}}. The STorM32 serial ports are named {{BOX\|USB}}, {{BOX\|UART}}, {{BOX\|UART2}}, and {{BOX\|UARTX}}, and are accessible in the GUI as {{PARAMVALUE\|usb}}, {{PARAMVALUE\|uart}}, {{PARAMVALUE\|uart2}}, and {{PARAMVALUE\|uartx}}. The pins corresponding to, e.g., the ports {{BOX\|UART}} and {{BOX\|UART2}} are labelled accordingly as Rx/Tx and Rx2/Tx2.

	{{~~COMMENT~~\|~~The naming scheme may be confusing to those coming from~~ the ~~FPV-world, since~~ in ~~that world it has become common to name~~ the ~~UART ports by~~ the ~~MCU peripheral~~ name. ~~STorM32 doesn't follow that scheme (STorM32 is older than the FPV scheme~~ in ~~fact LOL)~~, ~~it rather follows the PX4/ArduPilot approach~~.}}		UART1 is different. It is not a port like {{BOX\|UART}} or {{BOX\|UART2}}, and you won't find any parameter with the option {{PARAMVALUE\|uart1}} in the GUI, yet the name "UART1" appears in various places, e.g. as Rx1/Tx1 labels on boards, or in pin descriptions, or in documentary.

	=== MCU Peripherals and Special Role of UART1 ===		=== MCU Peripherals and Special Role of UART1 ===

	~~Few words on~~ microcontroller (MCU) peripherals~~. STorM32 uses~~ the ~~STM32 series of chips. The STM32's~~ serial peripherals are called UARTx or USARTx, where x goes from 1 to 5 for e.g. the STM32F103RC chip (we will not distinguish between UARTx or USARTx but just call them UARTx). Note: This naming convention is a choice of the chip manufacturer, not ours.		The microcontroller (MCU) which is used in the STorM32 controllers (STM32F103 chip) offers a number of hardware peripherals, among them the serial peripherals. These are generally called UARTx or USARTx, where x goes from 1 to 5 for e.g. the STM32F103RC chip (we will not distinguish between UARTx or USARTx but just call them UARTx). Note: This naming convention is a choice of the chip manufacturer, not ours.

	The names for the ~~MCU~~ serial peripherals must not be confused with the names of the serial ports of the STorM32 controller! ~~They may or may not coincide.~~		The names for the serial hardware peripherals must not be confused with the names of the serial ports of the STorM32 controller!

	For the ~~STM32F103 chips used by~~ the v3.3 ~~board~~, the hardware peripheral UART1 is special, since it allows us to flash firmware into the microcontroller, and ~~this~~ is ~~exploited~~ by STorM32. On the ~~v3.3~~ boards, the ~~pins for the hardware peripheral are exposed~~, ~~and this~~ is the reason for why one finds a UART1 port (or Rx1/Tx1 labels) on this ~~board~~.		For instance, on the v1.3x boards the serial port {{BOX\|UART}} is connected to the hardware peripheral UART3, while on the v3.3 and v4.1 boards it is connected to the hardware peripheral UART5. From a user perspective this is however irrelevant, since all the user needs to know is that there is a serial port {{BOX\|UART}} which can be selected in the GUI as {{PARAMVALUE\|uart}}.

			The hardware peripheral UART1 is special, since it allows us to flash firmware into the microcontroller, and it is used by STorM32 for exactly this purpose. Therefore, we want to expose it on the STorM32 boards so we can flash the firmware using it, which is the reason for why one finds a UART1 port (or Rx1/Tx1 labels) on some boards.

			Unfortunately, the number of serial ports provided by a STorM32 board or by the MCU is not sufficient for some applications. On v1.3x boards, e.g., one would want to also use the peripheral UART1 to fullfill the user's needs. In the STorM32 software, this is made possible, for some features, as {{BOX\|UARTX}} port.

	=== Availability ===		=== Availability ===
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	Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:		Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:

	~~The v3.x, v4.x, v6.x~~ STorM32 boards ~~all~~ provide the ~~{{BOX\|USB}},~~ {{BOX\|UART}}~~, {{BOX\|UATRT2}}, and {{BOX\|UART3}} ports~~.		* All STorM32 boards provide the {{BOX\|UART}} port.

	The {{BOX\|~~UART3~~}} port is ~~shared with two~~ pins of the {{BOX\|RC}} port, pins RC-0 and RC-1		* The v3.3/v4.1 STorM32 boards do provide a port labeled UART1 (Rx1/Tx1), which is indeed the UART1 hardware peripheral. Some v3.3 and the v4.1 boards do also provide a physical USB connector, which is however just again the UART1 peripheral (tied together via a on-board USB-TTL adapter). The UART1 port or USB connector is accessible in the GUI as {{PARAMVALUE\|usb}}, i.e., this is the {{BOX\|USB}} port.

			* On the STorM32 v1.x boards the {{BOX\|USB}} serial is indeed the USB connector. The UART1 hardware peripheral, used e.g. for flashing firmware, is available on these boards on the {{BOX\|RC}} port, as pins RC-0 and RC-1.

			* On the v3.3/v4.1 STorM32 boards the {{BOX\|UART2}} serial is either available as an explicit {{BOX\|UART2}} port or via the {{BOX\|ESP}} port. The v1.x boards do not offer this serial at all (for these boards the GUI setting {{PARAMVALUE\|uart2}} has no effect).

			* On all STorM32 boards the {{BOX\|UARTX}} serial is available on the {{BOX\|RC}} port, pins RC-0 and RC-1 (accessible in the GUI as {{PARAMVALUE\|uartx}}). In pictures of the v1.x board one however finds it indicated as UART1 and not UARTX (on these boards {{BOX\|UARTX}} is in fact the UART1 peripheral).

	{\| class="wikitable"		{\| class="wikitable"
	! Gui		! Gui
	! v3.3/v4.1 ~~! v6.2~~		! v1.3x
			! v3.3/v4.1
	\|-		\|-
	\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port		\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port \|\| {{BOX\|UART}} port
	\|-		\|-
	\| {{PARAMVALUE\|uart2}} \|\| {{BOX\|UART2}} port		\| {{PARAMVALUE\|uart2}} \|\| has no effect, {{BOX\|UART2}} port not available \|\| {{BOX\|UART2}} port or on {{BOX\|ESP}} port
	\|-		\|-
	\| {{PARAMVALUE\|usb}} \|\| USB connector (is ~~internally connected~~ to UART1 ~~for)~~		\| {{PARAMVALUE\|usb}} \|\| USB connector \|\| USB connector or UART1 port<br>is equal to UART1
	\|-		\|-
	\| {{PARAMVALUE\|~~uart3~~}} \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled ~~UART3~~		\| {{PARAMVALUE\|uartx}} \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>is equal to UART1, labeled UART1 \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UARTX
	\|}		\|}
			<!--

			The naming of the STorM32's serial ports can be confusing. This article aims at providing some clarification.

			== Ports ==

			Generally one has to distinguish between the hardware peripherals provided by the STM32 micro-controller and their names, and the available serial ports and their naming.

			Unfortunately, there is some overlap in the naming, which certainly contributes to the confusion. Furthermore, some STorM32 serials may not be found on ports which are named accordingly, but on "other" ports. This mess is certainly unfortunate, but reflects the efforts to continually increase the STorM32's capabilities and satisfy user demands while keeping some backwards compatibility.

			The hardware peripherals are generally called UARTx or USARTx, where x goes from 1 to 5 for e.g. STM32F103 chips. We will not distinguish between UART or USART but just call them UARTx.

			Concerning the STorM32's serials, the general rule is that they are named {{BOX\|USB}}, {{BOX\|UART}}, {{BOX\|UART2}}, and {{BOX\|UARTX}}, and that these are accessible in the GUI as {{PARAMVALUE\|usb}}, {{PARAMVALUE\|uart}}, {{PARAMVALUE\|uart2}}, and {{PARAMVALUE\|uartx}}. These must not be confused with the STM32's peripherals UART1, UART2, UART3, and so on.

			Concerning the availability of the serials, one can note:

			* All STorM32 boards provide the {{BOX\|UART}} port.

			* The STorM32 v3.x boards do provide a port labeled UART1, which is indeed the STM32 UART1 peripheral, and can be used for flashing firmware, but to the STorM32 firmware it is the {{BOX\|USB}} port (accessible in the GUI as {{PARAMVALUE\|usb}}). Some STorM32 v3.x boards provide in addition a physical USB connector, which is however just also UART1 (i.e. connected to UART1 with a USB-TTL adapter), with said function. On the STorM32 v1.x boards the {{BOX\|USB}} port is indeed the physical USB connector, while the STM32's UART1 peripheral used for flashing firmware is available on the STorM32 {{BOX\|RC}} port, pins RC-0 and RC-1.

			* On the STorM32 v3.x boards the {{BOX\|UART2}} serial is either available as an explicit {{BOX\|UART2}} port or via the {{BOX\|ESP}} port. The v1.x boards do not offer this serial at all (for these boards the GUI setting {{PARAMVALUE\|uart2}} has no effect).

			* On all STorM32 boards the {{BOX\|UARTX}} serial is available on the {{BOX\|RC}} port, pins RC-0 and RC-1 (accessible in the GUI as {{PARAMVALUE\|uartx}}). In pictures of the v1.x board it is however indicated as UART1 and not UARTX (on these boards UARTX is in fact the STM32 UART1 peripheral).
			-->

	== Baudrate ==		== Baudrate ==

OlliW: /* Availability */

2025-08-04T08:34:47Z

Availability

← Older revision		Revision as of 10:34, 4 August 2025
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	{\| class="wikitable"		{\| class="wikitable"
	! Gui		! Gui
	! v3.3/v4.1 \| v6.2		! v3.3/v4.1 ! v6.2
	\|-		\|-
	\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port		\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port

OlliW: /* Availability */

2025-08-04T08:34:33Z

Availability

← Older revision		Revision as of 10:34, 4 August 2025
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	{\| class="wikitable"		{\| class="wikitable"
	! Gui		! Gui
	! v3.3/v4.1/v6.2		! v3.3/v4.1 \| v6.2
	\|-		\|-
	\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port		\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port

OlliW: /* Availability */

2025-08-04T08:34:08Z

Availability

← Older revision		Revision as of 10:34, 4 August 2025
Line 23:		Line 23:
	Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:		Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:

	* All STorM32 boards provide the {{BOX\|UART}} ~~port~~.		The v3.x, v4.x, v6.x STorM32 boards all provide the {{BOX\|USB}}, {{BOX\|UART}}, {{BOX\|UATRT2}}, and {{BOX\|UART3}} ports.

	* The v3.3/v4.1 STorM32 boards do provide a port labeled UART1 (Rx1/Tx1), which is indeed the UART1 hardware peripheral. Some v3.3 and the v4.1 boards do also provide a physical USB connector, which is however just again the UART1 peripheral (tied together via a on-board USB-TTL adapter). The UART1 port or USB connector is accessible in the GUI as {{PARAMVALUE\|usb}}, i.e., this is the {{BOX\|~~USB~~}} port.		The {{BOX\|UART3}} port is shared with two pins of the {{BOX\|RC}} port, pins RC-0 and RC-1

	* On the STorM32 v1.x boards the {{BOX\|USB}} serial is indeed the USB connector. The UART1 hardware peripheral, used e.g. for flashing firmware, is ~~available on these boards on the {{BOX\|RC}} port, as~~ pins ~~RC-0 and RC-1.~~

	* On the v3.3/v4.1 STorM32 boards the {{BOX\|UART2}} serial is either available as an explicit {{BOX\|UART2}} port or via the {{BOX\|ESP}} port. The v1.x boards do not offer this serial at all (for these boards the GUI setting {{PARAMVALUE\|uart2}} has no effect).

	* On all STorM32 boards the {{BOX\|UARTX}} serial is available on the {{BOX\|RC}} port, pins RC-0 and RC-1 ~~(accessible in the GUI as {{PARAMVALUE\|uartx}}). In pictures of the v1.x board one however finds it indicated as UART1 and not UARTX (on these boards {{BOX\|UARTX}} is in fact the UART1 peripheral).~~

	{\| class="wikitable"		{\| class="wikitable"
	! Gui		! Gui
	~~! v1.3x~~		! v3.3/v4.1/v6.2
	! v3.3/v4.1
	\|-		\|-
	\| {{PARAMVALUE\|uart}} ~~\|\| {{BOX\|UART}} port~~ \|\| {{BOX\|UART}} port		\| {{PARAMVALUE\|uart}} \|\| {{BOX\|UART}} port
	\|-		\|-
	\| {{PARAMVALUE\|uart2}} \|\| ~~has no effect,~~ {{BOX\|UART2~~}} port not available \|\| {{BOX\|UART2}} port or on {{BOX\|ESP~~}} port		\| {{PARAMVALUE\|uart2}} \|\| {{BOX\|UART2}} port
	\|-		\|-
	\| {{PARAMVALUE\|usb}} \|\| USB connector ~~\|\| USB connector or UART1 port<br>~~is ~~equal~~ to UART1		\| {{PARAMVALUE\|usb}} \|\| USB connector (is internally connected to UART1 for)
	\|-		\|-
	\| {{PARAMVALUE\|~~uartx~~}} ~~\|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>is equal to UART1, labeled UART1~~ \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled ~~UARTX~~		\| {{PARAMVALUE\|uart3}} \|\| RC-0,RC-1 pins on {{BOX\|RC}} port<br>labeled UART3
	\|}		\|}
	~~<!--~~

	~~The naming of the STorM32's serial ports can be confusing. This article aims at providing some clarification.~~

	~~== Ports ==~~

	~~Generally one has to distinguish between the hardware peripherals provided by the STM32 micro-controller and their names, and the available serial ports and their naming.~~

	Unfortunately, there is some overlap in the naming, which certainly contributes to the confusion. Furthermore, some STorM32 serials may not be found on ports which are named accordingly, but on "other" ports. This mess is certainly unfortunate, but reflects the efforts to continually increase the STorM32's capabilities and satisfy user demands while keeping some backwards compatibility.

	~~The hardware peripherals are generally called UARTx or USARTx, where x goes from 1 to 5 for e.g. STM32F103 chips. We will not distinguish between UART or USART but just call them UARTx.~~

	Concerning the STorM32's serials, the general rule is that they are named {{BOX\|USB}}, {{BOX\|UART}}, {{BOX\|UART2}}, and {{BOX\|UARTX}}, and that these are accessible in the GUI as {{PARAMVALUE\|usb}}, {{PARAMVALUE\|uart}}, {{PARAMVALUE\|uart2}}, and {{PARAMVALUE\|uartx}}. These must not be confused with the STM32's peripherals UART1, UART2, UART3, and so on.

	~~Concerning the availability of the serials, one can note:~~

	* All STorM32 boards provide the {{BOX\|UART}} port.

	* The STorM32 v3.x boards do provide a port labeled UART1, which is indeed the STM32 UART1 peripheral, and can be used for flashing firmware, but to the STorM32 firmware it is the {{BOX\|USB}} port (accessible in the GUI as {{PARAMVALUE\|usb}}). Some STorM32 v3.x boards provide in addition a physical USB connector, which is however just also UART1 (i.e. connected to UART1 with a USB-TTL adapter), with said function. On the STorM32 v1.x boards the {{BOX\|USB}} port is indeed the physical USB connector, while the STM32's UART1 peripheral used for flashing firmware is available on the STorM32 {{BOX\|RC}} port, pins RC-0 and RC-1.

	* On the STorM32 v3.x boards the {{BOX\|UART2}} serial is either available as an explicit {{BOX\|UART2}} port or via the {{BOX\|ESP}} port. The v1.x boards do not offer this serial at all (for these boards the GUI setting {{PARAMVALUE\|uart2}} has no effect).

	* On all STorM32 boards the {{BOX\|UARTX}} serial is available on the {{BOX\|RC}} port, pins RC-0 and RC-1 (accessible in the GUI as {{PARAMVALUE\|uartx}}). In pictures of the v1.x board it is however indicated as UART1 and not UARTX (on these boards UARTX is in fact the STM32 UART1 peripheral).
	~~-->~~

	== Baudrate ==		== Baudrate ==

← Older revision		Revision as of 20:33, 21 November 2025
Line 27:		Line 27:
	Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:		Concerning the availability of the serial ports (for STorM32 boards documented in this wik) one can note:

	* All STorM32 boards provide ~~the~~ {{BOX\|UART}} port.		* All STorM32 boards provide a {{BOX\|UART}} port.

	* All "full-size" STorM32 boards provide ~~the~~ {{BOX\|USB}} port (exception are some special designs such as micro boards). On the v1.3x and v6.x1 boards the USB connector is tied to the ~~MCUs~~ USB peripheral, whereas for the v3.3 and v4.1 boards it is connected via a on-board USB-TTL adapter to the UART1 peripheral.		* All "full-size" STorM32 boards provide a {{BOX\|USB}} port (exception are some special designs such as micro boards). On the v1.3x and v6.x1 boards the USB connector is tied to the MCU's USB peripheral, whereas for the v3.3 and v4.1 boards it is connected via a on-board USB-TTL adapter to the UART1 peripheral.

	* The v3.3/v4.1/v6.x STorM32 boards provide ~~the~~ {{BOX\|UART2}} serial on the {{BOX\|UART2}} port or {{BOX\|ESP}} port. The v1.x boards do not offer this serial (here the GUI setting {{PARAMVALUE\|uart2}} has no effect).		* The v3.3/v4.1/v6.x STorM32 boards provide a {{BOX\|UART2}} serial on the {{BOX\|UART2}} port or {{BOX\|ESP}} port. The v1.x boards do not offer this serial (here the GUI setting {{PARAMVALUE\|uart2}} has no effect).

	* All STorM32 boards ~~offer~~ the {{BOX\|UARTX}} serial~~, which~~ is found on the {{BOX\|RC}} port, pins RC-0 and RC-1, and is accessible in the GUI as {{PARAMVALUE\|uartx}}. In pictures of the v1.x board it is however labelled as UART1 and not UARTX.		* All STorM32 boards provide the {{BOX\|UARTX}} serial. It is found on the {{BOX\|RC}} port, pins RC-0 and RC-1, and is accessible in the GUI as {{PARAMVALUE\|uartx}}. In pictures of the v1.x board it is however labelled as UART1 and not UARTX.

	* ~~The~~ v3.3 STorM32 ~~boards provide a port labeled UART1 (Rx1/Tx1)~~, ~~which is indeed~~ the UART1 hardware peripheral~~. Some v3.3 also provide a physical USB connector, which~~ is ~~however just again the~~ UART1 ~~peripheral~~ (~~tied together via a on-board USB-TTL adapter~~). ~~The UART1 port or USB connector is accessible in~~ the ~~GUI as {{PARAMVALUE\|usb}}, i~~.~~e.,~~ this is the {{BOX\|~~USB~~}} port.		* On the v3.3 STorM32 board, the UART1 hardware peripheral is available as extra UART1 (Rx1/Tx1) port. On the v1.3x boards this peripheral is on the {{BOX\|RC}} port, pins RC-0 and RC-1.

	{\| class="wikitable"		{\| class="wikitable"

← Older revision		Revision as of 20:28, 21 November 2025
Line 29:		Line 29:
	* All STorM32 boards provide the {{BOX\|UART}} port.		* All STorM32 boards provide the {{BOX\|UART}} port.

	* ~~The v3.3/v4.1~~ STorM32 boards do provide a port ~~labeled UART1~~ (~~Rx1/Tx1~~)~~, which~~ is ~~indeed~~ the ~~UART1 hardware~~ peripheral~~. Some~~ v3.3 and ~~the~~ v4.1 boards ~~do also provide a physical USB connector, which~~ is ~~however just again the UART1 peripheral (tied together~~ via a on-board USB-TTL adapter~~). The~~ UART1 ~~port or USB connector is accessible in the GUI as {{PARAMVALUE\|usb}}, i.e., this is the {{BOX\|USB}} port~~.		* All "full-size" STorM32 boards provide the {{BOX\|USB}} port (exception are some special designs such as micro boards). On the v1.3x and v6.x1 boards the USB connector is tied to the MCUs USB peripheral, whereas for the v3.3 and v4.1 boards it is connected via a on-board USB-TTL adapter to the UART1 peripheral.

	* ~~On the STorM32 v1~~.x boards the {{BOX\|~~USB~~}} serial ~~is indeed~~ the ~~USB connector~~. The ~~UART1 hardware peripheral, used e~~.~~g. for flashing firmware, is available on these~~ boards on the {{~~BOX~~\|RC}} ~~port, as pins RC-0 and RC-1~~.		* The v3.3/v4.1/v6.x STorM32 boards provide the {{BOX\|UART2}} serial on the {{BOX\|UART2}} port or {{BOX\|ESP}} port. The v1.x boards do not offer this serial (here the GUI setting {{PARAMVALUE\|uart2}} has no effect).

	* ~~On the v3.3/v4.1~~ STorM32 boards the {{BOX\|~~UART2~~}} serial is ~~either available as an explicit~~ {{BOX\|~~UART2~~}} port ~~or via~~ the {{~~BOX~~\|~~ESP~~}} ~~port~~. ~~The~~ v1.x ~~boards do~~ not ~~offer this serial at all (for these boards the GUI setting {{PARAMVALUE\|uart2}} has no effect)~~.		* All STorM32 boards offer the {{BOX\|UARTX}} serial, which is found on the {{BOX\|RC}} port, pins RC-0 and RC-1, and is accessible in the GUI as {{PARAMVALUE\|uartx}}. In pictures of the v1.x board it is however labelled as UART1 and not UARTX.

	* ~~On all~~ STorM32 boards the ~~{{BOX\|UARTX}} serial~~ is ~~available~~ on ~~the {{BOX\|RC}} port, pins RC~~-~~0 and RC~~-~~1 (~~accessible in the GUI as {{PARAMVALUE\|~~uartx~~}}). ~~In pictures of~~ the ~~v1.x board one however finds it indicated as UART1 and not UARTX (on these boards~~ {{BOX\|~~UARTX~~}} ~~is in fact the UART1 peripheral)~~.		* The v3.3 STorM32 boards provide a port labeled UART1 (Rx1/Tx1), which is indeed the UART1 hardware peripheral. Some v3.3 also provide a physical USB connector, which is however just again the UART1 peripheral (tied together via a on-board USB-TTL adapter). The UART1 port or USB connector is accessible in the GUI as {{PARAMVALUE\|usb}}, i.e., this is the {{BOX\|USB}} port.

	{\| class="wikitable"		{\| class="wikitable"