*BUMP* Let me shorten the question: If I switch console output to UART1 instead of UART0 using CONFIG_CONSOLE_UART_CUSTOM and connect the modem to IO1 and IO3, how do I program the MCU? Do I have to route TX and RX from the programmer to both IO0 and IO3 (for flashing) and to UART1 GPIOs (for consol...

Sorry for bumping into an old topic but I have a question that follows along what op & others have discussed couple of years back. I'd like to use UART wakeup function for communication with an AT command modem. As far as I understood I can't use UART2 at all and UART1 has some limitations (IO9 and ...

Can someone from Espressif please answer this?

WiFive wrote: ↑

Thu Mar 03, 2022 2:56 pm

The digital core might work below 3v but I think the radio needs 3v even on esp32.

Re ESP32, documentation says 2.3V. It doesn't mention anything about the radio requiring 3V. We use an external 1.8V flash.
Attached are both ESP32 and ESP32-C3 recommended operating conditions.

Why does the C3 and S3 have minimum operating voltage 3V? I'm talking about the version without the SiP flash. What limits it so high? For example ESP32-D0WD-V3 works from 2.3V so I wonder what's the difference between them.

Would using an UART interrupt be of any help, ie. cause less data loss? I see that UART2 is not usable with UART interrupt, only UART0 and UART1. I can't use UART0 since I'm using it for flashing ang logging so the only option is UART1. I have the AT command module connected to GPIO 16 (RX) and GPIO...

esp_zag0 wrote: ↑

Sat Feb 19, 2022 8:05 pm

So you confirm that loosing 12-13 characters is expected behaviour when using DFS + light sleep and RX for wakeup? There is no way to reduce lost/corrupted characters? Would using UART for wakeup make any difference?

Can someone please comment on this?

Thanks, using ULP for buffering seems like a good solution.

So you confirm that loosing 12-13 characters is expected behaviour when using DFS + light sleep and RX for wakeup? There is no way to reduce lost/corrupted characters? Would using UART for wakeup make any difference?

Any ideas

Hi! I'm having difficulties using UART in combination with automatic light sleep. I enabled PM and tickless idle in menuconfig: CONFIG_PM_ENABLE=y CONFIG_FREERTOS_USE_TICKLESS_IDLE=y CONFIG_FREERTOS_IDLE_TIME_BEFORE_SLEEP=2 Here's my code: #define LOG_LEVEL ESP_LOG_INFO #include "driver/uart.h" #inc...