mirror of https://github.com/laanwj/k210-sdk-stuff.git synced 2024-11-22 17:36:20 +04:00

History

Wladimir J. van der Laan d7eb8dd0e8 rust: sysctl PLL setting Port over the terrible PLL frequency setting code, and use it to set up the clocks for every demo.		2019-08-20 21:18:23 +00:00
..
demo	Fix debug printing in uart-passthrough demo	2019-05-27 09:50:44 +02:00
src	rust: sysctl PLL setting	2019-08-20 21:18:23 +00:00
.gitignore	rust: Add uart-passthrough	2019-05-20 15:58:09 +02:00
Cargo.toml	Dependencies bump	2019-07-02 17:20:39 +00:00
README.md	Add demo for uart-passthrough	2019-05-21 17:10:51 +02:00

README.md

`uart-passthrough`

Pass through UART from host to the ESP8285 WIFI chip.

Any input from the host is forwarded to the ESP8285, and any input from the ESP8285 is forwarded to the host.

Allows setting the baudrate through an out-of-band protocol. Pulling DTR low will reset the baudrate to the safe default of 115200, accepting two commands:

0x23   <baudrate 32-bit LE>
  Set baudrate (both to host and ESP)

0x42
  Reset ESP8285 MCU (toggle WIFI_EN pin)

others: no op

The connection from the K210 to the ESP can handle up to 115200*40=4608000 baud, however the connection to the host seems to get stuck at a lower number. Use AT+UART_CUR= (not UART_DEF !) to set the baudrate at the ESP side so that it is always possible to reset the MCU to get back to 115200 baud.

There's a demo in demo/weather.py.