Flashing the ESP8266-12F Joy-IT from raspberry

Question

It is possible to flash the ESP8266 12-F with the raspberry UART or I2C pins ? Has anyone ever done this? Thank you.

EDIT: OK it's work, finally I just had big problems with my breaboard and my connections. ... enter image description here

Answer 1

It is possible to flash the ESP8266 12-F with the raspberry UART pins ? Has anyone ever done this?

I've used the USB ports for this with esptool.py.

esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py --port /dev/ttyUSB0 write_flash -fm dio 0x00000 nodemcu.bin

I use "nodeMCU" style boards that have a micro USB jack (so using a normal micro USB cable). I also thought hardware flow control, which the Pi UART conventionally lacks, was necessary, but looking around this is not be the case, you just have to hold CH_PD and/or some other line high. So it should be possible.

I've found the serial interface on the ESP a bit fussy -- as in good ol' minicom is not reliable with it, the best thing seems to be miniterm.py, which is part of the pyserial package.

• goldilocks: No, I use a micro USB cable directly; the nodeMCU ones are big breakouts with a jack on them. I may have used an FTDI cable at some point, I know I've had an ESP that required it (no jack on the breakout).
• Ephemeral: Have you an idea of the minimum current for the flash boot mode or uart download mode or SDIO/SPI wifi mode please ? I cannot find this informations , I have read the datasheet.
• goldilocks: Pretty sure the ESP pins are all 3.3V, but some breakouts may include shifters. And don't quote me on that ;)
• Ephemeral: Thank you for your time and this informations. Yes also think the ESP8266 have 3.3V pinout but , his supply voltage is: Voltage 3.0V ~ 3.6VˈTypical 3.3VˈCurrent >500mA This information makes me think that it is not really tolerant ... that's what bores me actually.
• Jaromanda X: typical current usage on ESP8266 less than 200mA, not more than 500mA @Ephemeral