Is there a way to tap into the ESP8285 chip that is onboard Sipeed M1w ?
I was wandering if it was possible to activate sleep modes from esp to trigger the main chip.
Hi ,
you can use the UART communication pin’s to connect the ESP and M1w ,
Pins on M1W:
WIFI_RXMCU_RX
WIFI_TXMCU_TX
WIFI_EN
WIFI_SPI_CS
WIFI_SPI_CLK
WIFI_SPI_MISO
WIFI_SPI_MOSI
UART is for AT commands but what about SPI - is it for data buffer transfers?
Anyone knows how ESP8285 or 8266 works with TCP using AT commands and SPI non uart transfers work?
Thanks
SPI might be for the Firmware updation .
Just if anyone is interested - now ESP8266_FRERTOS_SDK IDF-style is available which means basically all code from esp32 except dual core functions will most likely compile and run on both - esp8266 and esp8285(1MB onchip flash 
).
Additionally there is CMake support which eliminated any crazy flash-tool operations and all is done with same cmd line as esp32 env.
Just awesome )