Search found 4 matches

by andrew_aus
Tue Sep 06, 2022 2:01 am
Forum: ESP-AT
Topic: No "ready" message when using SPI AT
Replies: 1
Views: 2271

No "ready" message when using SPI AT

Hi, I see that after the ESP-AT (UART) firmware starts up and is ready for normal operation it emits a "ready" message out the UART. But I am using the ESP32-C3 AT SPI build, which is mostly working, but I don't seem to ever get a ready message, not after power up and not after issuing the AT+RST co...
by andrew_aus
Tue Sep 06, 2022 1:42 am
Forum: ESP-AT
Topic: ESP AT SPI on C3
Replies: 4
Views: 3740

Re: ESP AT SPI on C3

Hi banjoluck You've probably figured this out by now but the handshake is positive edge triggered, not level triggered. So, the slave status should be read only when you see the handshake line transition from low to high. Check the source code for how it works. In the AT project search for the file ...
by andrew_aus
Fri May 24, 2019 11:30 pm
Forum: General Discussion
Topic: UART hardware flow control
Replies: 2
Views: 4465

Re: UART hardware flow control

Thanks Helen, that's all I needed to know.
I couldn't try it because our custom board is yet to be manufactured and was checking if we should add any pull resistors on cts, but obviously not required.
Cheers.
by andrew_aus
Fri May 24, 2019 9:04 am
Forum: General Discussion
Topic: UART hardware flow control
Replies: 2
Views: 4465

UART hardware flow control

Hi, I plan on using the AT command firmware in an ESP32-WROOM-32D. It appears to have hardware flow control (RTS/CTS) enabled by default. I'm not using flow control and have left pins GPIO14 & 15 unconnected. My question is what is the default state of the CTS pin (GPIO15) and what is the sense of C...