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 --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