How to use CTS RTS

[utya]

Hello. My gps uses CTS/RTS pin.
Im using Stm32L476JG, how i can enable cts/rts. The gps connected to USART. I tied
HardwareSerial Serial1(PA_10, PA_9);

Serial1.setCts(PB_4);
Serial1.setRts(PG_12);

please help

[ABOSTM]

HI @utya,
I don't see obvious reason for CTS/RTS not working,
pin configuration seems correct.

Knowing that variant Stm32L476JG doesn't yet exist in this core, which variant did you used ?
Note: you can add this new variant following this wiki: https://github.com/stm32duino/wiki/wiki/Add-a-new-variant-%28board%29
especially the 3 - Generic System Clock configuration, which may impact the USART capability

[utya]

@ABOSTM
thanks for replay. Im using nucleo-L476RQ (variant). I don't maybe it's not correct.
i could check another uart, and it worked with manually configured pins like this
HarwareSerial serial5 (PD_2, PC_12).
rts/cts work if download release by git, not by Arduino Broad manager

[fpistm]

rts/cts work if download release by git, not by Arduino Broad manager

This is normal as this feature has been added recently and will be available within the next release. See #1634

[ABOSTM]

nucleo-L476RQ doesn't exist, I guess you mean nucleo-L476RG.
nucleo-L476RG doesn't have PG_12 so you cannot use nucleo-L476RG variant to use PG_12 as RTS for USART :
It is not in the peripheral pin array PinMap_UART_RTS[] for this board

Arduino_Core_STM32/variants/STM32L4xx/L475R(C-E-G)T_L476R(C-E-G)T_L486RGT/PeripheralPins.c

Line 215 in e156c32

WEAK const PinMap PinMap_UART_RTS[] = {

But PG_12 is defined in PinMap_UART_RTS[] for Stm32L476JG

Arduino_Core_STM32/variants/STM32L4xx/L476J(E-G)Y_L485J(C-E)Y_L486JGY/PeripheralPins.c

Line 232 in e156c32

{PG_12, USART1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},

So I strongly suggest to follow the wiki to add your variant:
https://github.com/stm32duino/wiki/wiki/Add-a-new-variant-%28board%29

[utya]

i understood, thanks i will try to add by wiki. but unfortunately I don’t know what kind of quartz I have on the board.
if the configuration from the nucleo worked, then i should to copy it from there

nucleo-L476RQ doesn't exist, I guess you mean nucleo-L476RG.
yes. it's true.