Feature/esp slip communication #5
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This only works with an old version of the ESPtool because newer version use a new bootloader (written by and called CESANTA)
This solves #2 and now Windows users should be able to upload new wifi firmwares.
The new esptool.py loads a special program in memory and then runs it. This special program requires byte mode (it does not use the frames of the esp rom) and so we now switch back to byte mode after seeing a MEM_END of FLASH_END command. Updated esptool to the most recent version from github. Also improved the visual feedbacks on the leds.
Follow the baudrate requested by the computer. Allows us to send data much faster. We will now default to 2Mbit/s.
This way we do not need to flash a different image on the teensy uc before flashing the ESP. Much much better. It's also super fast now and flashes in 5 seconds!
Add to invert the order in which we set DTR/RTS in the python script to get things to work on Windows, otherwise auto-detection of when to reboot did not work. This will be something to remember when eventually updating esptool.py.
add little description of what each led color means in the source.
We were waiting for a 1000ms delay (which is what the ESP sleeps for) but that was apparently too much and we did not reboot on my test on Linux. 500ms seems long enough to avoid rebooting too often but also short enough to be triggered when the ESP actually boots.
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Successfully tested on Linux/Windows/Mac. |
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This fixes #2 and makes it easier to upload firmware via standard platformio commands.
This also improves the "programmer" code by reading in frames instead of reading in bytes.