I've sent the UART data to UART0 TX line, got the response at RX line below.
Please see the attached file.
It's exactly same time with transmitted and received data.
It's not connected with TX/RX line. End of the line are connected the level shifter and LTE modem.
I've capture the scope image at R295(Yellow), R296(Blue).
How can I disable this echo? Please advice to me.
Really appreciate all. Thanks.
UART ack problem
UART ack problem
- Attachments
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- esp32_uart_levelShifter.png (34.43 KiB) Viewed 912 times
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- esp32_uart_pin_schematic.png (3.66 KiB) Viewed 912 times
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- esp32_uart_tx_rx.png (233.59 KiB) Viewed 912 times
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